Gram Positive bacteria Phylum Firmicutes
C. botulinum
causes botulism produces neurotoxin that causes flaccid paralysis
C. tetani
causes tetanus produces neurotoxin that causes muscle rigidity and locks jaw
What bacteria can produce antibiotics?
Bacillus sp.
Phylum Firmicutes genera of medical significance
Clostridium Bacillus Streptococcus Staphylococcus
Clostridium characteristics
Obligate anaerobes and form endospores
Betahemolytic Group B strep is called what
S. agalacitia
What is the most common cause of staph infections.
S. aureus
Staphylococcus leading cause of nosocomial infections is what?
S. aureus many are AB resistant including MRSA ( methicillin resistant)
what is a healthy inhabitant os staphylococcus on the skin?
S. epidermis
S. aureus in the healthy population
approx 30 % of the healthy population is affected but it asymptomatically
S. pneumoniae
best known for causing pneumococcal pneumonia can also cause pneumococcal meningitis in elderly hospitalized patients most susceptible rare but high mortality rate
Bacillus environment
common in soil ,only a few are pathogenic
S. mutans causes what
dental carries
S. pyogenes
especially beta hemolytic strains ,sore throat, impetigo, necrotizing fasciitis , toxic shock syndrome
Staphylococcus characteristics , motility ,o2 req
grapelike clusters and immoblie faculative anaerobes
Streptococcus characteristics
grow in chains , and often classified according to their hemolytic enzymes
Staphylococcus environment
grow well under high osmotic pressure and low moisture
Harmless strains of streptococci are used where
in dairy products.
C. difficile
may cause serious diarrhea when long term antibiotic use alters the normal intestinal flore
What diseases is S. aureus responsible for?
mild skin infections, impetigo ,folliculitis,invasive diseases like necrotizing fasciitis (wound infections ,bacteremia w/ complications )and toxin mediated diseases l(food poisoning toxic shock syndrome)
Betahemolytic Group B strep is called what S. agalacitia causes what
neonatal meningitis and sepsis
Bacillus characteristics
rods and produce endospores
