Bacillus cereus exist in soil and several plants. Especially rice, pasta, cream and puddings are sources of the B. cereus. But the main sources of the bacterium are improperly reheated rice meals. It  is spor-former bacteria and causes several illness such as keratitis.

Bacillus cereus Protection

Dry foods such as cereal and legume must be stored in [...]

Clostridium botulinum is spor former bacterium which exists in soil, spring water and sea. Canned foods are the important source of C. botulinum, because it easily can multiply in anaerobic conditions. C. botulinum causes causes the flaccid muscular paralysis seen in botulism by producing neurotoxin botulin.
Clostridium botulinum Protection

When you buy canned foods, you must not [...]

L. monocytogenes is a foodborne pathogen that causes human listeriosis. It is stubborn pathogen which can tolerate salt, pH changes, refrigerated temperatures and inadequate thermal pasteurisation.
Scientist have been developed several test kits which use antibodies to determine L. monocytogenes. But according to US and Indian scientists, these test kits are not sensitive and rapid enough.
The [...]