BACILLUS GRAM NEGATIVE

Bacteria are single cellular microscopic organisms. The study of bacteria is known as bacteriology and it’s a branch of microbiology. The singular world for bacteria is “bacterium”. Bacteria have been grouped into prokaryotic, which means absence of nucleus.

Bacillus gram negative is the genus of bacteria family and a member of the phylum Firmicutes. There are many gram-negative bacilli of medical significance. The most important of these are members of the family enterobacteriaceae. Other genera of bacillus include vibrio, campylobacter and pseudomonas.

 

Gram negative bacteria when stained in gram stain results in pink color due to the action of decolorizing agent.

 

CHARACTERISTICS OF ENTEROBACTERIACEAE:

• Usually they are rod shaped bacillus.
• They are Anaerobic.
• Usually they are motile.
• Absence of capsule.
• Abundantly found in soil, water, and plants and Intestines of humans and animals.
• Ferment glucose with acid production
• Reduce nitrates into nitrites

CHARACTERISTICS OF PSEUDOMONAS:

• They are small Gram-negative rods shaped bacillus with a single polar flagellum.
• They are free living and are most abundantly found in soil, sea water, fresh water, colonize plants and animals.
• They are good decomposers and bioremediations.
• They are aerobic bacillus.
• They produce oxidize and catalyses.

The diseases caused by bacillus gram negative are: diarrhea, inflammatory disease of the large intestine, infantile diarrhea, kidney damage, typhoid fever, Plague, etc. The diagnosis depends on history, and the symptoms of patients. General treatment with streptomycin, tetracycline or chloramphenicol.