gram negative Flashcards
Rickettsia: shape, (obligate yes or no), transmitted, causes?
-gram negative rod
-obligate intracellular parasite
-transmitted by insect and tick bites
-causes spotted fevers in humans
Wolbachia: Shape?, Where do they live in?, what do they do?
Gram negative rods
live inside insects and invertebrates
can turn male insets into females
Bordetella pertussis: shape, causes, what does it have?
gram negative coccobacillus, ENCAPSULATED
Whooping cough
Bordetella Pertussis Virulence factors
Pertussis toxin: inhibits monocytes migration to infection
Tracheal cytotoxin- kills ciliated epithelial cells, accumulation of mucus
Pili- adhere to respiratory tract
What is the trasmittion route of Bordetella pertussis
respiratory route
How many stages are there in Bordetella Pertussis and what stage does the whooping cough start? What is the vaccine being used?
3 stages
second stage: Paroxysmal stage
SUBUNIT vaccine (DTap)
What is Pseudomonas Aeruginosa resistant to and why
antibiotics, outer membrane contains porins that pump these chemicals, and grows inside disinfectant bottles
What causes pneumonia, utis and infections in burns?
Pseudomonas Aeruginosa
What does pseudomonas Aeruginosa secrete
blue green pigment
Enterobacterial: shape? How many genera are there?
gram negative rods
7 genera
What organism indicates fecal contamination in food and water
e.coli
What causes travelers diarrhea and UTI’s?
E.coli
what causes food poisioning due to undercooked poultry?
Salmonella enterica
what shape is salmonella and o2 requirements
gram negative rods, facultative anerobe
found in rodents and direct contact with fleas and can cause the bubonic plague
yersinia pestis
What species causes meningitis in children under 6?
Hemophilus influenzae
What are the culture requirement for Haemophilus influenzae ? and o2 requirements
,Requires blood to grow
X and v factors,
what causes blindness in human and non-gonococcal uteritis (Std)
Chlamydia trachmotasis
name two obligate intracellular parasites?
Chlamydia and ricketssia
What species of spirochetes causes syphilis
Treponema Pallidium
Spirochetes: shape__
gram negative helical rods
All enterics are ____ anerobes, what are they?
facultative, e.coli, salmonella, yersinia
What are the two gram negative spirals? o2 requirements?
Vibrio
Helicobacter
facultative anerobes
What species of helicobacter causes gastritis and peptic ulcers? it can also cause stomach cancer
Helicobacter pylori
how are spirochetes motile?
motile via axial filaments
Name the gram negative cocci
Neisseria
What gram negative rod is encapsulated
Bordetella pertussis
