Understanding Microfilaria Transmission Modes
The transmission of microfilaria by vectors like the female Culex mosquito involves specific biological processes. Understanding these modes is key to identifying how pathogens spread.
Cyclodevelopmental Transmission Explained
Cyclodevelopmental transmission refers to a process where the parasite undergoes developmental stages (morphological changes) within the vector's body, but it does not multiply (increase in number) there. After a period, the parasite reaches an infective stage.
Application to Microfilaria and Culex Mosquitoes
- Microfilaria, the larval forms of filarial worms, are ingested by a female Culex mosquito when it feeds on an infected host.
- Inside the mosquito, the microfilaria develop into infective larvae (typically the third-stage larvae). This constitutes the developmental part.
- The microfilaria do not multiply within the mosquito; their numbers do not increase.
- Therefore, the transmission cycle involving microfilaria in a Culex mosquito fits the definition of cyclodevelopmental transmission.
Options like 'propagative' involve multiplication, 'cyclopropagative' involve both development and multiplication, and 'vehicle-borne' relates to inanimate objects, none of which accurately describe this specific vector-parasite interaction.
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Important Questions from Miscellaneous
- Which of the following scheduler/schedulers is/are also called CPU scheduler ?
(A). Short Term Scheduler
(B). Long Term Scheduler
(C). Medium Term Scheduler
(D). Asymmetric Scheduler
Choose the correct answer from the options given below: - A situation where two or more processes are blocked, waiting for resources held by each other is called:
- External fragmentation occurs ________.
- Which disk scheduling algorithm looks for the track closest to the current head position?
- Which CPU scheduling algorithm prefers the process with the shortest burst time?
