Retroviridae
The commonest bacterial infection in HIV disease is/are

all of these
bartonella infection
salmonella infection
mycobacterial infection

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Retroviridae
HIV or Human Immunodeficiency Virus is considered unique because each virus contains:

more than 100 copies of the viral genome
a viral enzyme known as reverse transcriptase
a genome made up of both DNA and RNA components
sticky proteins that allow it to bind tightly to host cells

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