Final answer:
The contagious disease in question could be toxoplasmosis, rabies, or leishmaniasis, which are all zoonotic diseases that are not treatable in schools or salons and are caused by animal parasites.
Step-by-step explanation:
The contagious disease caused by an animal parasite and cannot be treated in the school or salon could likely be toxoplasmosis, rabies, or leishmaniasis. These diseases are zoonotic, which means they are transmitted from animals to humans. Specifically, toxoplasmosis is caused by the protozoan Toxoplasma gondii and is a significant concern for pregnant women due to the risk of serious birth defects. Rabies is a fatal viral disease primarily transmitted through the bite of an infected animal. Lastly, leishmaniasis is caused by various species of the protozoan parasite Leishmania and is transmitted by the bite of infected sand flies.