Human race has been affected with parasite infections since the time immemorial. The mouth is the entry port for many parasites. Parasitic infections are commonly seen in tropics. It is commonly seen among people with poor living conditions and where personal hygiene is commonly ignored. To treat the infection, early diagnosis of the specific parasite is important. Early treatment must be delivered at the right time as many may develop into serious diseases. Это и многое другое вы найдете в книге Oral Parasitology (Masthan K. M. K.,Aravindha Babu N. and Priyadharsini C.)