Bacteria Phyla

Proteobacteria- Largest and most diverse phylum- Contain genus Rhizobium – convert nitrogen into ammonia- Contain genus Nitrosomnas –convert ammonia to nitrite which allows other bacteria to convert to nitrate- Contains genus Agrobacterium causes tumors in plants- Rickettsiae causes Rocky Mtn. Fever- Helicobacter pylori causes stomach ulcers- Species are enteric such as E. coli make vitamin K and help enzymes break down food- Contains genus Salmonella which invades intestinal cells or creates toxins

Gram-Positive Bacteria- Most gram+ but some are gram –- Contains streptoccal species causes strepthroat- Contains Clostridium botulinum- Contains Lactobacilli – creates lactic acid turns milk soar and used to make yogurt- Contains Bacillus anthrax – biological weapon- Contains Actinomycetes used to make antibiotics such as tetracycline & Streptomycin- Contains genus Mycobacteria causes tuberculosis and leprosy

Cyanobacteria- Contain genus Anabaena which form specialized cells called heterocysts that convert nitrogen into ammonia- Responsible for Oxygen rich atmosphere

Spirochetes

- Gram negative bacteria- Some aerobic or anaerobic- Contains Treponema pallidum causes Syphilis- Contains Borrelia burgdorferi causes Lyme disease

Chlamydia- Gram Negative- Coccoidal- Live only inside animal cells- Cell walls lack peptidoglycan- Chlamydia trachomatis causes nongonococcal urethritis or chlamydia