UNIT V
FOOD-BORNE DISEASES AND
FOOD POISONING
Causes of disease,
Investigations and Origins of food poisoning outbreaks,
Importance of food poisoning to individual and economy, Contr
Food poisoning bacteria causing infections, intoxications
,Food-borne diseases are harmful illnesses mainly affecting the gastro-intestinal
are transmitted through consumption of contaminated food and drink.
Causes of Disease
Agents responsible: Microbes, parasites, chemicals,
natural plant toxicants, fish toxicants, metabolic disorders,
allergy-causing foods, radioactive materials
A. Bacteria - Toxins
• Exotoxins - protein from metabolic activity, produced by gram + ,-ve bacte
structural component, secreted into environment.
• Endotoxins - Lipopolysaccharides, cell wall component released when cel
down/dies, produced by gram -ve bacteria.
May act as enterotoxin (affects gut), stimulate pyrogens release, increas
permeability, produce rashes, septic shock .
,
,
FOOD-BORNE DISEASES AND
FOOD POISONING
Causes of disease,
Investigations and Origins of food poisoning outbreaks,
Importance of food poisoning to individual and economy, Contr
Food poisoning bacteria causing infections, intoxications
,Food-borne diseases are harmful illnesses mainly affecting the gastro-intestinal
are transmitted through consumption of contaminated food and drink.
Causes of Disease
Agents responsible: Microbes, parasites, chemicals,
natural plant toxicants, fish toxicants, metabolic disorders,
allergy-causing foods, radioactive materials
A. Bacteria - Toxins
• Exotoxins - protein from metabolic activity, produced by gram + ,-ve bacte
structural component, secreted into environment.
• Endotoxins - Lipopolysaccharides, cell wall component released when cel
down/dies, produced by gram -ve bacteria.
May act as enterotoxin (affects gut), stimulate pyrogens release, increas
permeability, produce rashes, septic shock .
,
,
