If you’re a regular reader, you’ll note the recurring theme of "every animal (and person) is carrying multiple microbes that can harm you, given the right circumstances. Fortunately, the right circumstances don’t usually occur."

There are situations in which those risks increase, and understanding cost-benefit is a key aspect of disease prevention. Sometimes pet

Pasteurella multocida is a bacterium that is commonly found in various pet species. It typically inhabits the upper respiratory tract of healthy pets, although it is an important cause of respiratory disease in rabbits ("snuffles"). It is also a zoonotic pathogen, and human infections are sporadically reported. Most are associated with bites, mainly from cats.

Peritoneal dialysis is used to treat some people with chronic kidney failure. Infection is a major concern, particularly peritonitis (infection of the lining of the abdomen) because peritoneal dialysis involves having an indwelling catheter that goes through the skin and body wall directly into the abdominal cavity.

Infections can occur from bacteria that inadvertently get