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Difference Between HIV Type 1 and 2


Notes on HID AIDS Type 1 Vs Type 2 For Medical & Biology Student in Word / .doc Format

Types of HIV

HIV are of 2 types (antigenically related, but genetically different)

HIV-1 and HIV-2

HIV-1 is common type in most parts of the world and HIV-II causes similar disease in West Africa.

HIV – 2 is associated with a more indolent course & less efficient transmission & a long incubation period.  (20 years for HIV-2, 10 years for HIV-1)

Phylogenic analysis suggests that HIV-2 and Simian ID virus may have originated from the same source in Africa.

It is assumed that SIV from Chimpanzees is the source of HIV-1, whereas HIV-2 has slightly different genetic make up than HIV 1. It is slower in progress towards AIDS. Mainly concentrated in West Africa. It is originated from Sooty mangabeys.

Download Information on HIV Type I & Type II

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