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How to use parasites in a sentence

Looking for sentences and phrases with the word parasites? Here are some examples.

Sentence Examples

Blood used for counts of blood parasites was obtained by puncturing a wing vein with a small syringe tip.
Oral ivermectin is used for treatment of intestinal parasites, but recently has been proposed as an alternative agent for head lice infestation.
Drug-resistant coccidia parasites are on the rise, reducing the effectiveness of antibiotics.
Many studies have highlighted the emergence of important gastrointestinal coccidian parasites.
This family includes heteroxenous coccidian parasites that have the ability to form tissue cysts in intermediate hosts.
Other parasites will feed on any host available and are called facultative parasites.
Traditional immunizations prime the immune system to fight off parasites, bacteria, or viruses.
There was no evidence that the magnitude of the effect on allergen skin test reactivity differed between the three parasites.
The strain of staphylococci are recognized by natural virus parasites called phages.
Methods using photochemical treatment focus on inactivating bacteria, viruses, and parasites that are present in the component.
Populations fluctuated with the extent of monoculture, choice of cultivars, and extent of parasites.
The fiery local hot peppers may kill the local intestinal parasites before they start trying to kill you.
They too were reviled as outsiders, branded as parasites on the indigenous society.
Hundreds of peacekeeping troops have succumbed to the disease, after becoming infected with single-celled parasites called leishmania.
After all, more than half the species on Earth are parasites, and most organisms are host to a number of them.
Another hallmark of parasites is that hosts often evolve defenses against them.
Good places for reliable encounters are where small fish act as barbers to their hosts, cleaning away parasites from their skin.
All parental hosts of heterospecific brood parasites must pay the cost of rearing non-kin.
There are many species of parasites and disease organisms that infect dogs.
These genes are essentially immune system genes and defend the host organism from parasites.
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An implicit requirement is that parasites and their hosts match up to some degree.
The most sophisticated defense system used by hosts against parasites is the immune system.
If hosts and parasites are coevolving, this can drive the rapid divergence of amino acid sequences.
Another constraint on ejection is the close resemblance of eggs of hosts and parasites.
Selection has been intense as the parasites are host specific and the drugs are very widely used.
They are all a pack of bludgers and parasites who pay no taxes but spend ours.
I've repented my sins to Sepp and he has led me away from the bloodsuckers and parasites that threatened to dissolve my soul.
And that's what it will come to, for the council workers and other public sector parasites.
In the unionists' imagination, the rich are social parasites living lives of leisure on inherited wealth.
They were like parasites, leeching on to him, just wanting him to do this or that, or to torture him.
Insects include among their number parasites, parasitoids, carnivores, herbivores, scavengers, and detritivores.
In Costa Rica he watched parasitologists dissecting frogs, turtles, and iguanas and finding new species of parasites in each group.
The study of the strategies used by parasites for their transmission is a central topic in parasitology.
As the parasites accumulate in the blood vessels, they can restrict circulation and cause fluid to build up in surrounding tissues.
The society is characterised by class relations between producers and parasites.
They are by nature fastidiously clean and typically free from body odour and parasites.
Infection by pathogenic parasites may be a symptom of ill health, rather than the simple or single cause.
Birds that exhibit no infection may be immune to parasites or susceptible but not yet exposed.
The mycoplasmas are extra cellular parasites usually attached to the external surface of cells, but can also penetrate these.
All microbes, be it viruses, bacteria, mycoplasma, fungi or parasites interfere in research.
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An allele that provides better immunity against parasites will increase in frequency within a population.
The causes for chewing wood can be tooth problems and teething, stomach or intestinal parasites or mineral deficiency.
Trichogramma wasps, tiny parasites of the moth's egg stage, are commonly reared by insectaries and sold for pest control.
In order to control parasites, the goats would be drenched with anthelmintics.
There was no evidence of villous abnormality or parasites on duodenal biopsy.
Expulsion of resorufin was readily observed from the nephridiopore during observation of the labelled parasites.
The parasites encyst and lay their fertilized eggs within the lung of the host, to be passed enterically or via bronchial secretions.
These animals possess effective defense systems against microbes and parasites which involve engulfment of bacteria into specific cells.
Wild gorillas suffer a range of viral and bacterial illnesses as well as internal and external parasites.
Parasitic worms have evolved with their human hosts over thousands of years, and as successful parasites, do not kill their hosts.
Other typically much larger organisms, including parasites such as lice, worms and scabies can also spread from person to person.
In fact, the candiru is one of a very few vertebrate parasites that targets humans.
Numerous primates, including chimps, baboons, black lemurs and capuchins, dip into the jungle pharmacy to combat parasites.
This will allow the vet to insure the dog's health as well as test for parasites that may be there.
Garlic helps prevent and eliminate infections as well as destroys parasites, worms and viruses in addition to stimulating the immune function.
Chronic inflammation, a common feature of helminthic infections, has been proposed to play a key role in carcinogenesis induced by parasites.
In 1999 we prepared blood smears from all adults to check for the presence of hematozoa, bloodborne parasites transmitted by biting Diptera.
The most serious internal parasites are large and small strongyles, ascarids, bots, and pinworms.
Prevalence and intensity analyses included only strongyle and coccidian parasites.
Large remoras may attach themselves to turtles and act as cleaners, removing various external parasites.
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Some common ailments affecting the Congolese include malaria, parasites, tuberculosis, schistosomiasis, diarrhea, AIDS, and malnutrition.
The remoras themselves are covered with little parasites, crustaceans called copepods.
Infection with these food-borne parasites is prevalent in areas where uncooked cyprinoid fish are a staple of the diet.
Unlike many plants that grow in trees, epiphytic orchids are not parasites and don't harm the plants on which they grow.
The Venetian comedy also includes a pair of social parasites living off the prodigality of the extravagant young couple.
Patients return to hospital deaf from cinchonism, ill with fever, and showing parasites in their peripheral blood.
This famous game of war is played by parasites, panderers, bandits, assassins, peasants, sots, bankrupts, and such other dregs of mankind.
Brood parasites in general lay eggs with shells thicker than those of their hosts.
The little helpers known as cleaner fish, which nibble parasites off larger reef fish, actually prefer to nibble their clients.
Also hepatitis B, glandular fever and intestinal parasites have been associated.
Infections in these patients localize to the viscera rather than the skin, and parasites are found throughout the reticuloendothelial system.
Repeat peripheral smears on day 3 and day 7 were negative for malarian parasites.
An obstruction series or plain abdominal radiographs may be necessary to distinguish obstruction from parasites or bezoars.
The standard microscopic examination technique for malaria parasites enables the detection of all four human plasmodium species.
It may be that the West is fated, by its very cultural plenitude, to host some minimal number of such parasites.
Scientists theorize that birds could use toxins in their feathers and skin to ward off parasites and insects.
Altitude sickness, parasites, frostbite and being gored by a yak are some of the reasons most people prefer to travel in their armchairs.
Useful insects such as bees or natural parasites and predators of pests may be affected by pesticide residues.
Honey bees, when plagued by tiny tracheal mites, will use their legs like a fine-tooth comb to rid themselves of the life-threatening parasites.
The weakness of the neocons is that, politically speaking, they are parasites.
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Leishmania are protozoal parasites that are transmitted to humans by Phlebotomus sandflies.
The genus Dirofilaria includes various species that are natural parasites of dogs, cats, foxes and wild mammals.
Moreover, it can detect asexual parasites and young gametocytes with reasonable sensitivity and specificity.
Acquired immunity is the main physiological mechanism of defense available to vertebrates against parasites.
The fish clean the anemone's upper surface, remove parasites, drop food on the anemone, and chase away butterflyfishes that eat anemones.
Acute diarrhea is an important defense mechanism that enables your body to expel foreign bacteria and parasites quickly.
Others are rather unpleasant parasites themselves, such as ticks, chiggers, and the skin mites that cause mange and scabies.
In biological-control arms races, scientists bring in exotic predators and parasites to control exotic pests.
Its main study area is infectious diseases caused by viruses, bacteria and parasites.
These tiny parasites have been burrowing under your spiritual armour for way too long now.
Most of the leeches found in our lakes are parasites feeding on the body fluids of fish.
We measured various indicators of male health and condition, including the intensity of infection from ectoparasites and blood parasites.
The core of the work is the data set related to parasites recorded from grebe species.
At fish-cleaning stations, cleaner fish nibble the parasites from the gills and mouths of fishes much larger than they are.
Although their roles as parasitic castrators has been documented, relatively little is known about the biology of ciliate parasites in mayflies.
Birds need grit and places they can take a dust bath, which helps them rid their feathers of mites and other parasites.
How many times have truffle parasites evolved from cicada parasites in Cordyceps?
Various types such as guest ants, temporary parasites, inquilines or permanent social parasites, and slave-makers or dulotic species are known.
Other causes of bladder infections include parasites such as schistosomiasis, and fungi such as candida, which causes thrush.
The effects of internal parasites range from a dull haircoat and unthriftiness to colic and death.
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An enema of asafoetida is effective in treating threadworms and other intestinal parasites.
Five sharks circled us as rainbow runners scraped off parasites from their sides.
Be it parasites or disease, the apiculturist has a plethora of tools at their disposal.
She knew that the parasites were neither lethally poisonous nor big enough to do any real damage.
Water-borne parasites like giardia and viruses like Norwalk virus could cause similar problems.
They had to fight against the corporate parasites up top and imperialism abroad to retain the value they produced.
Chlamydia are obligate intracellular parasites that are present in 2 forms.
Various parasites such as lice, ticks, mites, aphides and chiggers attack untreated and unprotected animals and plants.
Microsporidia are a monophyletic assemblage of obligate intracellular parasites that generally infect animals.
The lice are parasites and are sucking off essential fluids, while leaving a gaping wound prone to infection.
Opportunistic bacteria, other parasites, fungi and candida, are threats whenever the healthy bacteria diminish.
Food poisoning is caused by consuming food or drink that is contaminated with bacteria, parasites or viruses.
Similarly, fruit flies selected to resist the attacks of parasites are less competitive foragers than their nonresistant counter-parts.
Methods of improved control of lac parasites and of preventing the lac insect from developing as a pest on non-host species need further study.
But the scientists cautioned that biological control of pests is risky if the parasites are not specific to the target pest.
As the rays hover over the seamounts, the diminutive angelfish come up and feed on the parasites that attach to the rays' skin.
Yes, squirrels, like humans, get sick and can be infected by a variety of parasites, bacteria, and viruses.
Athletes and owners would start looking like heroes instead of money-grubbing parasites.
Seven laboratories reported the presence of malarial parasites on a normal blood film.
Fly parasites are useful for the control of house flies, stable flies, blowflies, and many other fly species.
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Indeed, some parasites are castrators, completely destroying the host's reproductive machinery.
If these wild dogs don't die of sheer starvation, he said, diseases such as parvovirus, heartworm, or intestinal parasites usually kill them.
Medicines targeting fleas, ticks, heartworm, and intestinal parasites prevent both the pests and the diseases they cause.
If your child has ascariasis, she should be evaluated for other intestinal parasites, such as pinworm.
They keep their distance because the manure often carries the eggs of parasites such as lungworms.
Sea lice are natural parasites of wild salmonids in salt water, feeding on their mucus, skin, and blood.
These parasites are transmitted via oocysts that are excreted with the feces of the host.
Most sporozoans are intracellular parasites or at least part of their life-cycle takes place inside a host cell.
Also, prior to deworming again I would suggest a fecal exam to check to see what type of parasites the filly has and the amount.
Understanding trypanosomes at the molecular level is key to fighting African sleeping sickness and diseases caused by similar parasites.
In India, Nigella seeds are combined with various purgatives to allay gripping and colic and also help kill and expel parasites.
The solution of several apicomplexan, acanthocephalan and trematode parasites to this problem is a particularly efficient yet improbable one.
If your diarrhea lasts more than one week after returning, parasites such as giardiasis or amebiasis should be looked for.
The major group of mesozoans, the Dicyemida, live as microscopic parasites in the renal organs of squid and octopuses.
The dicyemid mesozoans are obligate parasites that inhabit the cephalopod renal appendage.
Greater Poison potions can be used to combat insects or parasites that infest a hive.
Every living creature, including plants, must contend with the ravages of diseases and parasites.
At the same time I had sharks, parasites and con artists turning up, all trying to get a piece of the action.
Mosquitoes, biting flies, and ticks are some of the well-known blood parasites that use CO2 as a directional cue.
Therefore, it is not surprising that parallels are drawn between transpositional activity and the virulence of conventional parasites.
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However, among helminth parasites, e.g., trematodes, cestodes, nematodes, and acanthocephalans, this is not the case.
Reid agrees that the swarming nature of krill likely increases their susceptibility to the parasites.
The good news is horsehair worms are internal parasites of insects only and do not harm humans, animals or plants.
If blood parasites have a detrimental effect on their hosts, heavy parasite infections will correlate with low host reproductive success.
There are a few parasites of the black crappie, which include many protozoa, trematodes, cestodes, and nematodes.
Future research should focus on such traits of cowbird relatives and on how these traits preadapted a particular lineage to become parasites.
These can be infected with water-borne parasites such as schistosomiasis, which is responsible for the disease bilharzia.
The European Union has instituted some tough new measures requiring that all cut flowers be whole, fresh and free of animal or vegetable parasites.
The progress of medical science has burdened society with a hoard of parasites, rentiers, pensioners, and other retired persons whom society has to support and even to nurse.
Stay well clear of them as they are all blood sucking parasites.
Taken together, our analysis provides strong evidence for a reductive mode of evolution in obligate intracellular parasites with high rates of DNA loss.
It occupies a wide-range of ecological niches throughout the Afrotropical region, is highly anthropophilic, and is susceptible to the human malaria parasites.
Some arachnid chelicerates are parasites, such as ticks and mites.
The present study demonstrates that digenean parasites induce population structure changes and shorten lifespan of mudsnails, through increasing size-dependent mortality.
Because infectious agents can produce symptoms indistinguishable from ulcerative colitis, microbiologic analyses for bacteria, parasites, and amoebas should be performed.
Numerous histiocytes contained small oval organisms with bar-shaped paranuclear kinetoplasts, morphologically consistent with leishmanial parasites.
Unlike most plant parasites, the broom-forming dwarf mistletoes may considerably benefit a forest community by creating additional food resources and habitat for many animals.
The other well-known xylem tapping parasites are the mistletoes.
In many instances the presence of infection can be determined by microscopic examination of the stool for evidence of parasites and microbiological culture for bacteria.
Consequently, the ability of parasites and predators of the orange tortrix to substantially suppress pest populations is greatly diminished by the use of insecticides.
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In contrast, crocodile birds wander freely among the basking creatures, picking leeches and parasites from their skins, and food fragments from their mouths.
Once infected with flukes, for instance, some species of snails have only a month or so before the parasites castrate them and turn them into food-gathering slaves.
Swimmers' itch, also called cercarial dermatitis, is an itchy rash caused by certain parasites that normally live on waterfowl and freshwater snails.
These parasites, such as roundworm, hookworm and whipworm, are found in the soil in some areas and spread through ingestion of infected soil or through the soles of bare feet.
Like all the best teachers, he was a great showman and his grand round presentations were occasionally enhanced with giant home made models of parasites and their vectors.
The farmer would either cull the vulnerable calves or, if they are valuable for other reasons, treat them for parasites and then sell the meat in the nonorganic market.
While people once might have attributed maladies to demonic possession, we now talk confidently about disease-generating microorganisms and parasites.
They are also hosts to a number of blood parasites and feather lice.
Some vermicides are poisonous to people as well as the parasites.
Unlike certain avian brood parasites, such as cuckoos and honeyguides, hatchling brown-headed cowbirds rarely directly destroy or actively displace host eggs and nestlings.
The advantages of being venomous are less clear for ticks, which are obligate, hematophagous parasites that depend on their host for a blood meal.
If they could have made money without work they would have gladly engaged in shady deals or just acted as parasites, leeching off society or their parents.
Same recipe used externally for crabs, lice, and all external parasites.
At that time, several groups of parasitologists interested in the microanatomy of filarial parasites examined the organisms with electron microscopes.
The banded coral shrimp feeds on parasites that live on reef fish.
A third method of pathogen inactivation is therefore being considered that not only inactivates all viruses but also kills bacteria, parasites, and lymphocytes.
Garlic also helps knock out intestinal worms and other parasites.
These guys are full parasites, taking sugar, water, and minerals from the tree.
They are represented now only by the lampreys, eel-like forms that are parasites on fish, and the hagfish, also eel-like but feeding on dead or dying animals.
A strong solution of it can even remove lice or other skin parasites.
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The next time the mosquito feeds, the parasites invade a new victim.
Dozens of demoiselles hovered, waiting for the combfish to remove their parasites while the goatfish below seemed oblivious to the free grooming services available.
They include several parasites that have an enormous impact on human populations, such as human liver flukes and the blood flukes that cause schistosomiasis.
These developmental differences between autotrophs and parasites suggest that the functions of photoreceptors differ among autotrophs, hemiparasites, and holoparasites.
An observed attraction of infected crickets and mantids towards water indicates that the parasites may induce this behavior, but the physiological stimulus is unknown.
Botfly larvae often attack nestlings as do other nest parasites.
Another trick used by chimps is to swallow bristly leaves whole, which irritate their stomachs and induce diarrhoea, flushing out tapeworms and other gut parasites.
Fifth, we test for correlations between ectoparasites and blood parasites.
We have recently reported a study of the digenean intestinal parasites of 956 eels captured in the estuarine bays of Arousa and Ferrol in the northwest Iberian Peninsula.
Thoughtless musical parasites nearly brought the entire record industry to its knees by recording scratchy vinyl or crackly medium wave onto hissy cassettes.
An abundance of parasites, such as viruses, bacteria, fungi, nematodes, tapeworms, and the larvae of flies, wasps, and moths, are known to infect bumblebees.
At the end of the antimonial therapy, the bone marrow aspirate did not show any L-D bodies or malarial parasites, and there was no residual lymphadenopathy.
All workers were oppressed, all middle class people parasites.
Novelists, poets and playwrights all see such biographers as parasites.
Almost all Egyptian mummies contained parasites which caused amoebic dysentery and bilharzia, and mummies in the New World had whipworm and roundworm eggs.
He's bushwhacked 2,000 miles through the some of the last untouched forests of Africa and hosted a rogue's gallery of tropical parasites and disease along the way.
Yes, branding roughly half the nation as lazy, entitled parasites is impolitic.
And parasites unable to transmit Chagas' disease are being engineered.
Threadworms, or pinworms, are small intestinal worm parasites.
One of their main parasites is a gut nematode, the caecal threadworm T. tenuis, which has a direct lifestyle with no alternative hosts within the same habitat.
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I tested these hypotheses experimentally in a host-parasite system involving wild turkeys and their intestinal protozoal parasites, the eimerian coccidia.
Such mothers were simultaneously seductresses and parasites.
They have antioxidant properties, antidiarrheal effects, and are toxic to a wide range of microbial organisms including parasites and some common viruses.
We tested whether male finches with experimentally elevated testosterone would be more likely to harbor coccidia, protozoan parasites that may cause coccidiosis.
Many of them were caused by fungus and parasites in the water.
Mullen presented 238 world-wide records of acarine parasites of mosquitoes but more than half of the observations concerned unidentified or doubtfully identified mites.
They are literary parasites, the enemies of creativity and imagination.
Host finding is an essential part of the life history of social parasites.
His line was that there are people living like parasites in Grub Street while other clean-limbed, honourable fellows are trying to improve the world.
More studies are needed before any conclusions regarding stunting, no effect or enhanced growth rate due to parasites can be reached.
Many species of Calliphoridae are saprophages that feed on animal carcasses, whereas others are obligate parasites.
Products available can thwart parasites such as sand flies, ticks and tapeworms.
Prevalence and intensity of haemogregarine blood parasites and their mite vectors in the common wall lizard, Podarcis muralis.
The majority of the Legionella cells in water are believed to live intracellularly as protozoan parasites.
This clean cut promotes healthier, thicker and more resilient lawn growth that is more resistant to disease, weeds and parasites.
Meloids are herbivorous as adults, and their larvae are parasites of bees or eat grasshopper eggs.
The parasites of the shark are a good snack for the abundant butterflyfish and the king angelfish.
When animals are imported from one country to another, there is the possibility that diseases and parasites can move with them.
As other fish, groupers harbour parasites, including digeneans, nematodes, cestodes, monogeneans, isopods, and copepods.
An examination of human and Neanderthal genomes and adaptations regarding pathogens or parasites may shed light on this issue.
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The psocopterans most readers are likely to encounter seem more social parasites than social.
As for birds, the European starling and the brown-headed cowbird are both nest parasites, Swift said.
Some African groups carry duplications of genes that may protect against sleeping sickness caused by trypanosome parasites.
Survey of blood parasites in two forest owls, Northern Saw-whet Owls and Flammulated Owls, of western North America.
Alwan said that pools are often dangerous and result in the spread of parasites and amebas.
The 10 parasites sicken millions of people every year causing epilepsy, anaphylactic shock, amoebic dysentery and other illnesses.
These findings strongly suggest that a large proportion of parasites might show clinical resistance to chloroquine and antifolate drugs.
They are often called bootlickers, apple-polishers, yes men, crawlers or even parasites.
In humans, Cryptosporidia parasites cause cryptosporidiosis, an acute diarrheal illness for which there is no effective medical treatment.
Visceral leishmaniasis is a systemic infection of the reticuloendothelial system caused by protozoan parasites of the genus Leishmania.
Rickettsiae are gram-negative coccobacillary bacteria that are strict intracellular parasites.
A number of common parasites, including roundworm, are transmitted via dog feces.
King Richard III suffered from a roundworm infection, with foot-long parasites living in his intestines.
When infected dog droppings are left on the ground the eggs of the roundworms and other parasites can linger in the soil for years.
We examined blood parasites in a seabird with an exclusively high-Arctic breeding distribution, the little auk.
In other cases, cirrhosis is believed to be caused by parasites in the liver ducts.
Also known as 'cestodes', these parasites are flat, segmented worms that live in the small intestine of cats.
Inhibitory effects of pepstatin A and mefloquine on the growth of Babesia parasites.
Giemsa stained thin blood films revealed enlarged oval and fimbriated red cells with trophozoite and schizont forms of malarial parasites.
Yes, moochers, schnorrers, sponges, free riders, freeloaders, and parasites exist.
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Schistosomiasis is caused by flatworm parasites that live in the blood vessels of the bladder and intestines.
A Ticks can be a serious problem, carrying microscopic parasites which cause tick fever.
The new species, which has been named Invavita piratica, belongs to a group of parasites known as tongue worms.
He shows how our relationships to our predators, parasites, and mutualists have changed, and how we have adapted to these changes.
The specimens she collected are being used to document the poorly known parasites of New Zealand's chondrichthyans.
Protozoan and metazoan parasites of Strecker's chorus frog, Pseudacris streckeri streckeri, from north-central Texas.
Epizootic infestations by nemertean brood parasites on commercially important crustaceans.
Cooking your meat to an internal temperature of 137 degrees will kill any trichinella parasites that may have invaded your wild hog.
The meat looks like lamb but must be cooked for at least an hour at 135 degrees to kill off trichinosis parasites.
Butterflyfish, damsels, and wrasses rushed up to the mantas' white undersides, speckled with black markings, to eat the parasites there.
The use of acetoorcein-stained squash preparations for enumeration of nuclei in microfilariae of various filarial parasites.
Of the 20 lizards collected alive, blood was negative for plasmodial or trypanosomal parasites, and feces were negative for coccidian oocysts.
Diminazene aceturate is an effective drug used in the treatment of trypanosomosis a disease caused by protozoan parasites known as trypanosomes.
Occurrence of Perkinsus olseni and other parasites in the venerid commercial clam Pitar rostrata from Uruguay, southwestern Atlantic Coast.
Examples include filariasis, malaria, trypanosomiasis, cysticercosis, schistosomiasis, and intestinal parasites.
Helminth parasites of cats from the Vientiane province, Laos, as indicators of the occurrence of causative agents of human parasitoses.
Common intestinal parasites include pinworm, whipworm, roundworm, hookworm, threadworm, and tapeworm.
In these areas protozoan parasites of the Plasmodial family are carried between human hosts by the female Anopheles mosquito.
Blood smear showed poikilocytes with some tear drops and reticulocytes and was negative for malaria parasites.
Herbivores included consumers of pollen, nectar, or homopteran egesta, and predators included parasites.
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Nearly all were Korean and Chinese Ageniaspis fuscicollis wasps, parasites of the apple ermine moth, received during the summer.
Prospective case-control study of the association between common enteric protozoal parasites and diarrhea in Bangladesh.
The 5th edition of Ash and Orihel's Atlas of Human Parasitology is a superb, up-to-date compendium of protozoan and metazoan parasites.
With produce, the bacteria, viruses and parasites that cause the most concern come from human fecal matter, Cody says.
Two of the three remaining Holarctic species are social parasites, inquilines, which have different hosts in the Nearctic and Palearctic Regions.
The flagellated protozoan Dientamoeba fragilis is one of the most common parasites in the intestinal tract of humans.
The viability of the encapsulated parasites is long enough to enable the study of intravacuolar amastigogenesis and replication.
Samples of nauplius, copepodid and chalimus stages consisted of pools of parasites.
Synchronised parasites were harvested using gelafundin floatation at the trophozoite stage which was then cultured to ring stage.
Several hippoboscid flies have been identified as vectors of Haemoproteus species,haemosporidian blood parasites that cause bird malarias.
Most cows are presently periodically dosed to rid them of lungworms, warble larvae and intestinal parasites.
Gregarine parasites alternate hosts, having the reproductive and vegetative phase in the intestines of xanthid crabs, and sporogony in oysters.
It seems that growth rate is primarily affected on available food and time available for feeding, and not parasites.
The distribution of alkaloids within tissues may also reflect defence against parasites.
Crustaceans, nematodes, trematodes, and polychaete annelids also serve as parasites.
Sea urchins can also be infected by many parasites, be they internal or external.
The larvae of some sea anemones are parasites on ctenophores, as are the larvae of some flatworms that parasitize fish when they reach adulthood.
Some dinoflagellates may feed on other organisms as predators or parasites.
In addition to being parasites themselves, copepods are subject to parasitic infection.
Green sea turtles have a variety of parasites including barnacles, leeches, protozoans, cestodes, and nematodes.
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The yellow tang fish swims along with the turtle and feeds on the algae, barnacles, and parasites on its shell and flippers.
These activities may have a variety of purposes, such as courtship, communication, dislodging parasites, or play.
Many cleaner shrimp, which groom reef fish and feed on their parasites and necrotic tissue, are carideans.
In turn, carideans are eaten by various animals, particularly fish and seabirds, and frequently host bopyrid parasites.
External parasites include chewing lice of the genus Saemundssonia, feather lice and fleas such as Ceratophyllus borealis.
Terns are normally free of blood parasites, unlike gulls that often carry Haemoproteus species.
As with other bird families, pelicans are susceptible to a variety of parasites.
Other plausible explanations include escape from predators, shedding parasites, or to gulp or expel air.
The latitudinal distribution of parasites does not appear to follow this rule.
The exotic organisms may be predators, parasites, or may simply outcompete indigenous species for nutrients, water and light.
This may be due to competition from more effective, specialized parasites which occupy the same niche.
Internal parasites of badgers include trematodes, nematodes and several species of tapeworm.
Most of these parasites infect wolves without adverse effects, though the effects may become more serious in sick or malnourished specimens.
In areas where wolves inhabit pastoral areas, the parasites can be spread to livestock.
Tapeworms generally cause little harm in wolves, though this depends on the number and size of the parasites, and the sensitivity of the host.
The house sparrow is host to a huge number of parasites and diseases, and the effect of most is unknown.
The fungi involved include those that form ectomycorrhizas with trees and other woody plants, parasites such as Armillaria, and saprotrophs.
Fungi include symbionts of plants, animals, or other fungi and also parasites.
The blastocladiomycetes are saprotrophs, feeding on decomposing organic matter, and they are parasites of all eukaryotic groups.
When they grow on plants, they do not live as parasites, but instead use the plants as a substrate.

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