Listeria monocytogenes is the bacterium that causes the infection listeriosis. It is a facultative anaerobic bacterium, capable of surviving in the presence of oxygen. It can grow and reproduce inside the host’s cells and is one of the most virulent food-borne pathogens, ...
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Vibrio cholerae 01 and 0139 are the bacterial agents for the disease. V. cholarae 01 includes two biotypes- classical and E1 Tor- each of which includes organisms of Ogawa, Inaba and rarely Hikojima serotypes. Epidemiology​ They are Gram-negative, facultative anaerobic, motile, non-spore forming rods that ...
Staphylococcus aureus is gram positive cocci that occur in singles, short chains and irregular grape like cluster. Only the strains that produce enterotoxin can cause food poisoning. Epidemiology​ The most important sources to foods are nasal carriers and individuals whose hands and arms ...
The salmonella is small, gram negative, non-spore forming rod. They are widely distributed in nature with humans and animals being their primary reservoirs. Salmonella food poisonings result from indigestion of food containing appropriate strains of this genus in significant numbers. The genus Salmonella are considered ...
Aetiological agent of brucellosis is bacteria: Brucella abortus, Brucella melitensis and Brucella suis Epidemiology They are Gram-negative, aerobic, non-spore forming, short, oval, non-motile rods that grow optimally at 37°C and pH 6.6-7.4. They are heat labile. Symptoms Incubation period varies and can take several weeks or months. ...
Aetiological agent is Bacillus cereus bacteria toxin. B. cereus can cause two different types of foodborne illnesses: the diarrhoeal type and the emetic type. Diarrhoeal toxin causing toxico-infection due to production of heat-labile toxins either in the gut or in food. The enterotoxins are produced ...
Aetiological agent is Protozoa: Entamoeba histolytica Epidemiology The organisms are amoeboid, aero-tolerant anaerobe that survives in the environment in an encysted form. Cysts remain viable and infective in faeces for several days, in soil for at least 8 days at 24-34°C. They ...