In cities, where cat populations are high, the spread of feline AIDS (which is contracted through scratches and bites) is greatly facilitated.

在城市中，猫的数量很多，因此猫艾滋(由于抓伤和咬伤而感染)很容易传播。

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It turns out that coat color in cats may be associated with genetic changes that confer a defense against feline AIDS, and that in turn are linked to behavioral traits.

原来，猫的毛色很有可能与基因的变化有联系。基因变化使猫获得抵抗力抵挡猫艾滋，反过来也与猫的行为特征产生了联系。

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The researchers found that there was reduced replication of the feline Aids virus - known as feline immunodeficiency virus (FIV) - in these cats.

BBC: Glowing cats shed light on Aids

The scientists inserted one gene into the cats that helps them resist the feline form of Aids.

BBC: Glowing cats shed light on Aids