| Various parasites such as lice, ticks, mites, aphides and chiggers attack untreated and unprotected animals and plants. |
| Cervical screening detects abnormalities which, if left untreated, could lead to cervical cancer. |
| The cultures were divided into two aliquots, one of which was irradiated while the other one was left untreated. |
| All 10 mice that received the drug thrived and never developed an arrhythmia, while 8 out of 9 untreated mice became arrhythmic and died. |
| The follow-up did not allow for comparison with an untreated control group since the original wait-listed group had gone on to receive therapy. |
| If untreated, jaundice can lead to infection and abscesses in the liver, which can be fatal. |
