Parasites exhibit the combinations of biochemical, physiological and nutritional unique adaptations and display a range of mechanisms to evade the immune system. The book possesses the most important places of lectures on parasitology. Particular attention is given to environmentally sustainable development, control and prevention of epizootic situation of parasitic diseases of humans and animals in East Africa.This manual can be read students passed entomology and zoology courses. Author express hopefulness this manual will be the useful to students qualifying in biotechnology and bioinformatics as well as to specialists involving in a broad spectrum activity like sustainable development, wild life management and conservation policy.