Table 2.

Patient characteristics associated with increased prevalence of retrovirus infection^{4,45,47,75,78,80,81}

Risk factor	FeLV	FIV
Increasing age	xx	xxx
Male sex	xx	xxx
Sexually intact status	xx	xxx
Outdoor access	xxx	xxx
Close contact with infected cats	xxx	xx
Inter-cat aggression	xx	xxx
Illness (especially oral disease, abscess, respiratory tract disease)	xxx	xxx
Kitten born to an infected queen	xxx	x

‘xxx’ indicates a stronger risk association than ‘xx’ or ‘x’

FeLV = feline leukemia virus, FIV = feline immunodeficiency virus