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Micro - G+ Rods
Stack #79448
Question | Answer |
---|---|
Bacillus | chains and singles; found in dirt; makes an endospore; some species are harmful to man |
Bacillus cereus | prefers to grow on grains (cereal, breads, etc); CAUSES: food poisoning |
Bacillus anthracis | usually harmless; CAUSES: anthrax - eating, in wound, inhale large dose |
Lactobacillus | not considered a pathogen; normal in mouth, throat, gut, and vagina, found in dairy products (esp. yogurt), ID - lactose + |
Corynebacterium | tiny rods; singles; normal to skin; aerobic; only one species is harmful: C. diphtheriae |
Propionibacterium | iny rods; singles; normal to skin; anerobic; only one species is harmful: P. aches |
Clostridium | makes endospores; found in dirt; doubles every 12 min; makes toxins (VF); anaerobic; normal gut flora; metabolizes to make gas |
Clostridium botulinum | causes: botulism (home canning) |
Clostridium tetani | causes: tetanus - VF: toxin |
Clostridium perfringens | causes: gangrene - kills tissue and dying tissue spreads; to heal: scrape wound to rid it of dead tissue |
Clostridium difficile | normal gut flora; causes - bad diarrhea |
Mycobacterium | grows slowly = 33 hr. to double; cell wall has waxy coat = nutrients in/out slower; strict aerobe; found in dirt, water, and respiratory tract |
Mycobacterium tuberculosis | grows best in lungs; test for exposure: PPD (Purified Protein Derivative) |
Mycobacterium bovis | causes: tuberculosis in cows; BCG = Baccillus of Calmet and Guerin |
Mycobacterium avium | intracellulare (2 kinds into 1); caused by birds that have tuberculosis; common in AIDS patients |
Mycobacterium leprae | causes: leprosy; grows very slowly (about 10-20 years; degrades cartilage |