Act 12 Gram Negative Bacteria The Nether Flashcards
Characteristics of gram negative bacteria
- common in nature
- inhabits the intestinal tract of humans and animals
- facultative anaerobe or aerobe
-
pathogenic: encapsulated, produce toxins
Tests: IMViC
Common name of Escherichia coli
Colon bacillus/ Traveller’s diarrhea
Specialized structures of E. Coli
- Fimbrae
- pili
- capsule
Where is e.coli usually found
Gastrointestinal tract; colonize vagina and urethra
Morphological characteristics of e.coli
Lactose fermenter, eosin methylene blue agar: greenish metallic sheen
Diagnostic test of e.coli
IMViC: ++—
TSI: A/A
Specialized structure of Vibrio cholerae
Flagella
Diagnostic test of Vibrio cholerae
TSI: A/A, ferments glucose and sucrose
Specialized structure of Salmonella typhosa
Flagella
Diagnostic test of Salmonella typhosa
TSI: K/A, no gas and with H2S
IMViC: -+-+
Common name of Klebsiella pneumoniae
Friedlander’s bacillus
Specialized structure of Klebsiella pneumoniae
Capsule
Diagnostic test of Klebsiella pneumoniae
TSI: A/A with gas
IMViC: —++
Common name of Shigella dysenteriae
Shiga’s bacillus
Specialized structure of Shigella dysenteriae
Capsule
Pili
Fimbrae
Diseases caused by Shigella dysenteriae
- shigellosis
- bacillary
- dysentery
Representative organisms of gram negative cocci
Neisseria gonorrheae
Neisseria meningitidis
Moraxella catarrhalis
What diseases are caused by Moraxella catarrhalis
Otitis media
Acute sinusitis
Bronchitis
Pneumonia
Diseases caused by Neisseria meningitidis
Meningitis
Meningococcemia
Common name of Neisseria gonorrhoeae
Gonococcus
Does Neisseria gonorrhoeae have a reservoir outside of a human
Naur
Specialized structure of Neisseria gonorrhoeae
Fimbrae
Pili
Capsule
