I believe one of the reasons there were few cats around is basically because they used to eat them. And once in a while the restaurant kitten catches would grab an cat they may find and take them back to the restaurant. I recall seeing pet cats in glass displays out the front of the restaurants. But somewhere between then and now they prohibited eating cats. So cats are actually not on the menu and now there are cats everywhere. Most of them started off in someone's house and received thrown away, because so many are very friendly. Also they have this thing about tummy worms. And in those times China was not as modern as now so abdominal worms would have been a problem. Fleas are not a really problem because they may have tile floors and real wood furniture.
Cats actually bring a few parasites, a few fleas plus some diseases and a few can turn serious but not many. If felines were causing too much sickness they might not have invaded our lives as well as they have. But there are still people out there who do nothing like felines. When I first went to China about twenty years ago there were very few pet cats living with people and incredibly few wild cats. I was astonished because I've acquired cats all my entire life and I never thought people didn't like cats. But then in China the folks said cats taken disease and that was it. I think that may have something to do with that cat sick you get in your eyesight. Not serious simply a slight problem for weekly Of course, if you were pregnant you'd to stay away from cats. I think they were referring to toxoplasmosis, but if you get that when you are a youngster it should not affect your child. In addition they said felines were dirty but I don't think so. I think felines are one of the cleanest pets you can have. I think that originated from the cats getting rid of the rats and mice. Because rats are incredibly dirty pets or animals then because the felines killed and ate them they will also be filthy. A dusty by connection type of thing. Also there were some big sewer rats running round during the day. Once I noticed a rat and a cat face off the other person and the pet cat wasn't much bigger than the rat. These were about a feet apart staring each other out and the cat ran away. I'm not shocked the rat's tooth were bigger that the cats.