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Campylobacter lari

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A gram-negative motile with long flagella and helically corkscrew-shaped bacterium involved in food borne gastroenteritis in humans.


Campylobacter lari has a size of 0.3 micrometer in diameter with 1.7-2.4 micrometer in length colonizing the mucosal surface of birds and mammals. It is commonly isolated in bird and human feces thriving in an environment in which oxygen concentration is less and carbon dioxide is more tending to change in shape when prolonged exposure to oxygen.

Campylobacter lari has a circular DNA that consists of 1,571 long nucleotides having one of the smallest genomes in the class wherein genes sets to produced sialic acid on the surface that serves as a protection when it enters the host. It has flagella known to be polar and bipolar when it is found at both ends.

Campylobacter lari is microaerophilic as well as capnophilic that needs more carbon dioxide to grow at temperature ranging from 37’C – 42’C with higher salinity concentration making it to thrives in marine environment. It produces enzymes including oxidase and catalase and has been isolated from the small intestine of pigs, dogs, cattle, poultry, birds and human.

Scientific classification:

 Kingdom: Bacteria
 Phylum: Proteobacteria
 Class: Epsilonproteobacteria
 Order: Campylobacterales
 Family: Campylobacteraceae  
 Genus: Campylobacter
 Species: Campylobacter lari

See also:

• Bacteria

• Gastroenteritis