|Description:||This image depicts a group of epidemiologists in the process of conducting an analysis on a domesticated dog, in order to determine if it had come into contact with plague infected prey, including rodents or rabbits. Here, they were extracting a blood sample from the canine, which would subsequently be tested for the presence of antibodies indicating whether or not this dog had been exposed to plague.|
Visual observation are very important, but conclusive proof of an epizootic depends on laboratory testing of sera, fleas, or animal tissues. Serological surveys of wild carnivores, or free-roaming domestic carnivores, are very useful in the detection of zootic plague. A positive antibody titer from a carnivore usually means that it has ingested plague-infected rodent or rabbit, or possibly been bitten by an infected flea.