Can infected fleas with plague transmit it to horses?

Yes, infected fleas can transmit the plague bacterium, Yersinia pestis, to horses, although such cases are rare. Horses are not the primary hosts for the plague, and transmission typically occurs through flea bites or contact with infected animals. While horses can become infected, they usually do not develop the same severe symptoms as humans or other susceptible mammals. It's important for horse owners in endemic areas to monitor for fleas and take preventive measures.