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Brucella species

Published on December 31, 2025   12 min

A selection of talks on Microbiology

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0:00
Hello, everyone. My name is Dr. Sarah Fouch. And welcome to this short recording, where we will be considering Brucella species. We will discuss the clinical condition that this organism is associated with and the virulence factors that make it a successful pathogen.
0:22
Brucella species are small gram-negative bacilli. They are aerobic organisms, which means they cannot survive without oxygen. There are 12 species of Brucella that can cause infections in a range of animals such as primates, foxes, pigs, rodents, sheep, goats, dogs and cattle. Many of the issues associated with this type of infection are serious and include abortion, impaired fertility or infertility. There are four main species of Brucella that are associated with human infections, and these are: Brucella abortus, which originates from cattle. Brucella melitensis originating from sheep or goats. Brucella suis originating from pigs or Brucella canis originating from dogs. When we think about the areas of the world where we see the most Brucella infections, this is associated with the Middle East, Asia, Africa, South and Central America and also some Mediterranean countries. As all of the Brucella species originate from animal sources, it's no surprise that these are zoonotic infections. And infections are reported worldwide when you think about some of those areas that I've just discussed. We don't tend to see many Brucella infections in the UK, but we do get them occasionally. Human infection is normally a result of consumption of contaminated dairy products and insufficient animal health protection. And this will result in the contamination of food products reaching the consumer.

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