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<big><center>[[Infectious agents and parasites|'''BACK TO INFECTIOUS AGENTS AND PARASITES''']]</center></big>
 
<big><center>[[Infectious agents and parasites|'''BACK TO INFECTIOUS AGENTS AND PARASITES''']]</center></big>
 
<big><center>[[Bacteria|'''BACK TO BACTERIA''']]</center></big>
 
<big><center>[[Bacteria|'''BACK TO BACTERIA''']]</center></big>
* These curved, microaerophilic, Gram-negative rods were discovered in the stomach of humans in 1987.
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* ''Helicobacter pylori'' in man.
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* In dogs: ''H. felis'', ''H. bizzozeronii'', ''H. salomonis'' and ''H. bilis''.
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* A [[Intestines - disease due to pathogens#|bacterial pathogen of the intestines]].
      
===Overview===
 
===Overview===
    
*Related to ''Campylobacter'' species and ''Arcobacter'' species
 
*Related to ''Campylobacter'' species and ''Arcobacter'' species
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*A [[Intestines - disease due to pathogens#|bacterial pathogen of the intestines]]
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*Discovered in the stomach of humans in 1987
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*''H. felis'', ''H. bizzozeronii'', ''H. salomonis'' and ''H. bilis'' found in gastric mucosa and intestines of dogs and cats
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*Helical, S-shaped or curved Gram negative rods
 
*Helical, S-shaped or curved Gram negative rods
 
*Require enriched media; some grow on Skirrow agar
 
*Require enriched media; some grow on Skirrow agar
*Microaerophilic
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*Microaerophilic, non-saccharolytic
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*Oxidase positive and catalase positive except for ''H. canis''
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*Helicobacters which colonise gastric mucosa are urease positive
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===Clinical infections===
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*''Helicobacter pylori'' causes gastritis and duodenal and gastric ulcers in humans
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*Association with gastric adenocarcinoma in humans
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*''H. mustelae'' has been associated with chronic gastritis and gastric ulcers in ferrets
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*Significance in gastrointestinal diseases of domestic carnivores not known
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