Bergey's Vol 3

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Author:
shughesi
ID:
182875
Filename:
Bergey's Vol 3
Updated:
2012-11-11 01:43:50
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Description:
Low G + C Gram Positive Bacteria
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  1. Genus Clostridium
    • Class Clostridia
    • Form endospores (spherical or oval)
    • Strictly anaerobic rods found in soil, water, intestinal tract of humans & other animals. 
    • Also in Sewage , marine sediments, and decaying vegetation. 
  2. Class Mollicutes
    • Bacteria lacking cell walls and cannot synthesized peptidoglycan precursor. 
    • Gram negative by default. 
    • Genus Mycoplasma, Ueraplasma, and Spiroplasma. 
  3. Genus Mycoplasma
    • Class Mollicutes
    • Mycoplasma pneumoniae
    • Produces a human disease called atypical pneumonia or walking pneumonia. 
    • Most freguently affects person 5-25 years old.
    • Causal agent in 25% of all pneumonias in young adults.
  4. Genus Ureaplasma
    • Class Mollicutes
    • Ureaplasma ueralyticum
    • hydrolyzes urea and requires a 10% urea medium to grow. 
    • Approx 1-2.5 million ppl in the U.S. are infected and can result in NGU. 
    • The organism tightly to sperm and can be transmitted by them to sexual pertners. 
    • Can be cultured from urethral and vaginal discharges. 
    • Estimated that it accounts for more than half of all infections that make couples infertile.
  5. Genus Spiroplasma
    • Class Mollicutes
    • Spiroplasma citri
    • causes citrus stubborn disease. 
    • Transmitted by leafhopper.
  6. Genus Bacillus
    • Class Bacilli
    • Cells rod shaped, straight, or nearly so. 
    • Form endospores with only one per cell. 
    • Sporulation not repressed by exposure to air. 
    • Gram positive or positive in the early stages of growth. 
    • Motility by peritrichous flagella or nonmotile. 
    • Aerobic or facultatively anaerobic. 
    • Most species are saprophytes in soil, water, and vegetation.
  7. Genus Listeria 
    • Class Bacilli
    • Short rods
    • Motile by peritrichous flagella
    • Aerobic or facultative anaerobic. 
  8. Genus Staphylococcus
    • Nonmotile cocci
    • Facultative anaerobes
    • usually form irregular clusters. 
    • Natural populations mainly assoicated with skin, skin glands, and mucous membranes of warm blooded animals including humans. 
    • Species are opportunistic pathogens of humans and/ or animals.
  9. Genus Lactobacillus
    • Class Bacilli
    • Long rods to short rods. 
    • Large amounts of lactic acid formed. 
    • Important in production of yogurt and sauerkraut
    • Also parasites in the mouth, intestinal tract and vagina of humans and warm blooded animals. 
    • Pathogenicity is rare. 
  10. Genus Leuconostoc
    • Class Bacilli
    • Cocci arranged in pairs or chains. 
    • Heterofermintative- form CO2 and ethanol or acetic acid in addition D - lactic acid
    • Nonpathogenic to plants and animals. 
    • Important in production of sauerkraut.
  11. Genus Streptococcus
    • Class Bacilli
    • Cell arrangeed in pairs or chains. 
    • Catalase negative. 
    • Most species are facultative anaerobes. 
    • Homofermentative- production of one primary product as a result of fermentation. 
    • With the production of L + lactic acid. 
    • Commensals or parasites on humans or animals
    • Some are highly pathogenic.

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