Biological Transmission of Diseases 3 Types
1. Propagative : Only multiplication of organisms, no change in form inside the vectors
Eg:- Plague bacilli in Rat fleas.
2. Cyclopropagative : Both multiplication in number and change in form.
Eg:- Malarial parasites in female anopheles mosquiotes.
3. Cyclodevelopmental : Only change in form, but no multiplication in numbers.
Eg:- Filarial parasite in Culex mosquito**, Guinea Worm in Cyclops.
** asked many times in exams.
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