Brucellosis is an infection caused by Brucella bacteria. The common reservoirs for Brucella bacteria that may infect humans are cattle, dogs, sheep, goats, and pigs.
Plague is caused by the bacillus Yersinia (Y.) pestis, belonging to the family of the Enterobacteriaceae. It evolved several thousand years ago from Y. pseudotuberculosis.
Plague is caused by Yersinia pestis bacteria. Blood sucking fleas transmit the bacteria among animals, and various species of rodents can become infected.
Sindbis virus is widely and continuously found in insects, such as Culex mosquitoes, in Eurasia, Africa, and Oceania. However, clinical infection in humans has almost exclusively been reported in northern Europe where it is endemic and where large outbreaks occur intermittently.
Arenaviruses cause diseases with two types of clinical presentations: neurological and haemorrhagic fever. However, asymptomatic arenavirus infection may occur.