Bacteria Associations/Key Points Flashcards
B. anthracis
Spores may persist in dry earth for years
B. cereus
Causes food-poisoning
L. monocytogenes
Grows well at refrigeration temperatures, infects many animals, foodborne transmission (avoid raw meat, unpasteurized milk, thoroughly wash raw vegetables), internalin, meningitis
Corynebacteria diphtheriae
Pseudomembrane, Chinese letter, palisade appearance
C. tetani
Soil and animal feces, terminal spores (“tennis racket”, “drumstrick” shaped)
C. botulinum
Soil, ponds, lakes, plants, high concentration in honey, associated with home-canned food products
C. perfringens
Associated with ingestion of contaminated meat, poultry, or vegetables, gangrene and food-poisoning
Clostridioides difficile
Causes diarrhea associated with antibiotic use
Nocardia spp
Infects individuals with deficient cell-mediated immunity, subacute pneumonia -> dissemination
Actinomyces israelii
Spread contiguously, ignoring tissue planes, indolent, suppurative infections
Enterobacterales
Many are opportunistic pathogens
UPEC
UTIs, type I and P pili
ETEC
Traveler’s Diarrhea (spread through contaminated food and water)
EPEC
Diarrhea in developing countries
EHEC
Cattle are reservoir (acquire from undercooked meat, unpasteruized milk and juices), bloody diarrhea, abdominal pain, leads to HUS in 10% of cases
Shigella
Cause dysentry
S. enterica
Common cause of diarrhea, reservoirs (farm animals esp chickens, turtles and other reptiles)
S. enterica serovar Typhi
Typhoid fever (prolonged fever, orccasionally a rash consisting of a few pink macules)
Y. enterocolitica
Causes infectious diarrhea
Y. pestis
Causes plague, usually in hikers or hunters who acquire illness from wild animals (e.g. prairie dogs)