Lecture%204

Lecture%204 - Gm ve rod family Enterobacteriaceae...

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Unformatted text preview: Gm ve rod family Enterobacteriaceae Psychrotroph-grows at refrigeration Hazard for improperly pasteurized milk or milk contaminated after pasteurization Yersinia pestis bubonic plague Different virulence factors Causes gastroenteritis Infective dose ? Often indistinguishable from Salmonella infection More invasive than Salmonella enteritidis Produces an enterotoxin gastroenteritis Abdominal pain due to invasion of the lymph nodes Mistaken for apendicitis Gastroenteritis syndrome is sometimes referred to as pseudoappendicitis Outbreaks are rare (not human pathogens?) Primary reservoir is domesticated pigs and rodents Water Ailment due to dissemination of bacterium to the mesenteric lymph nodes subsequent induction of acute inflammatory response by the host Fever and vomiting Disease occurs in 3 stages Primary phase begins in 2-3 days Gastroenteritis (abdominal pain, diarrhea, fever) Last 5-14 days to several months Secondary phase begins 1-3 weeks after consumption of food Skin disorders, hemorrhaging etc Tertiary phase Rheumatoid arthritis Graves disease or hyperthyroidism Crohns disease and septicemia Tend to occur in winter and fall High risk groups More cases in Canada and Europe-raw or undercooked pork Control: Proper heating of foods...
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Lecture%204 - Gm ve rod family Enterobacteriaceae...

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