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UNIT IV - Class Crusteacea - Cyclops - life cycle and vector relationship.

UNIT V - Mosquito - Borne diseases - Malaria, Filariasis, viral encephalitis, Dengue fever, Yellow Fever, Haemorrhage fever - Their epidemiology, transmission and control.

UNIT VI - Housefly - Borne diseases - Typhoid, Paratyphoid, Cholera, Dysentry, Gastroenteritis, Amoebiasis, Trachoma and other diseases Their epidemiology, transmission and control.

UNIT VII - Miscellaneous vectors - Bed bugs, Sandfly, Tsetse fly, Black fly, sand fly, Kalaazar, Oriental sores, Sand fly fever. Tsetse fly - Sleeping sickness (African and American) - Their epidemiology, transmission and control.

UNIT VIII - Ratflea - Bubonic Plague, Endemic typhus - Their epidemiology, transmission and control.

UNIT IX - Rodents - Antirodent measures - Use of rodenticides - Fumigation, trapping methods use of chemosterilants.

UNIT X - Vector control - Classification and use of insecticides - important groups of insecticides - Advantages and Disadvantages - Biological Control - Use of Bacillus phaericus, Gambusia fish.