Cat colonies present some interesting infectious disease challenges. Anytime we have animals congregating, there’s an increased risk of disease transmission, and when they’re outside, it also increases the risk of diseases from wildlife. Thus cat colonies can become a bridge for diseases between wildlife and people.

I’ll pause here to add a perspective that I’d

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Tritrichomonas blagburni (formerly T. foetus) is a frustrating cause of diarrhea in cats. This parasite causes chronic diarrhea that will most often ultimately resolve on its own, but it can take months (or longer). During that time, most cats are largely healthy but with very messy feces (and they’re infectious). Some cats do feel

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Veterinarians sometimes ask me, “Can I give a half dose of a vaccine to small breed dogs?” But more often they say, “An owner wants me to give their small dog a half dose of a vaccine because they are worried about adverse effects. Should I do that?

The short answer

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If I’m talking to veterinarians or veterinary students about infectious diseases and I mention Capnocytophaga canimorsus, I usually get a blank stare (or “capno-what?”). If I’m talking to physicians, it’s usually the same response, unless they’re infectious disease physicians or trainees (but I still get “capno-what?” from some of them on