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a bacterial species that causes emetic and diarrheal types of food poisoning in humans; can cause infections in humans and other mammals and a highly destructive infection of the traumatized eye.
a species of bacilli found in the soil. It causes food poisoning (an emetic type and a diarrheal type) by the formation of an enterotoxin in contaminated foods. The symptoms are similar to those of Staphylococcus food poisoning. It can also cause infections, such as ocular infections, and septicemia.
Bacillus cereusA ubiquitous, aerobic spore-forming, gram-positive non-anthrax bacillus.
B cereus causes foodborne outbreaks of gastroenteritis in Europe, but not in the US. Of the two clinical forms of disease, the diarrhoeal form is more common and has a 24-hour incubation period; the emetic (vomiting) form has a shorter (1–6-hour) incubation period.
• Diarrhoeal form—Epidemic gastroenteritis, diarrhoea.
• Emetic form—Watery diarrhoea, abdominal cramping, fever.
Because symptoms are mild, self-limited and mediated by an enterotoxin, antibiotics are not indicated.
B cereus is found in uncooked rice; the heat-resistant spores survive boiling, and germinate when uncooked rice is left unrefrigerated. Each type of gastroenteritis is caused by a different enterotoxin.
Ba·cil·lus ce·re·us(bă-sil'ŭs sĕr'ē-ŭs)
A species that causes an emetic type and a diarrheal type of food poisoning in humans and can cause infections in humans and other mammals.
a genus of bacteria that are gram-positive, aerobic, spore-forming rods. With the exception of B. anthracis and the occasional wound contamination and bovine mastitis caused by B. cereus, the organisms are largely saprophytic and do not cause disease. However, they may invade devitalized tissue. They do have importance in the area of food preservation.
Bacillus aneurinolyticus, Bacillus thiaminolyticus
are thiaminase-producing bacteria which may proliferate in the rumen and contribute to the cerebral lesions in carbohydrate engorgement and polioencephalomalacia in cattle.
characterized by its capacity to form spores when exposed to the air and to survive for long periods in soil and other inert materials. Has a characteristic appearance with McFadyean's stain. Causes anthrax in all species.
the source of tyrothricin.
a species causing food poisoning, occasional cases of septicemia and bovine mastitis and abortion.
Bacillus circulans, Bacillus coagulans, Bacillus stearothermophilus
very heat-resistant bacteria which cause fermentation of cereals in canned meat foods. They cause souring but no gas production so that the can does not bulge. Called also flat sour. B. stearothermophilus spores are used to test efficacy of autoclaves.
the cause of American foulbrood in honeybees.
reported as a cause of abortion in cattle, sheep and pigs, and also isolated from suppurative lesions of horses and cattle.
Bacillus polymyxa (Bacillus aerosporus)
strains of this organism are the source of the antibiotic polymyxin.
a common saprophytic soil and water form, often occurring as a laboratory contaminant, and rarely, in apparently causal relation to pathological processes, such as conjunctivitis.