BORDETELLA!!! MICROM 442 Deck 16 Flashcards
- B. pertussis
- B. parapertussis
- B. bronchiseptica
- B. holmesii
- B. hinzii (rarest)
Five human pathogenic species
clinical diagnosis sometimes complicated because?
Overlapping clinical pictures for B. pertussis & B. parapertussis
gram negative and what shapes??
cocobacilli
what type of aerobe?
strict -> makes sense they like the lungs :)
what color pigment does parapertussis have?
brown
all of these are non-motile except?
B. bronchiseptica
Regan-Lowe, Bordet-Gengou, Stainer-Scholte
– Colonies: Small, shiny, round, domed, silvery (on RL)
– On BG slight hemolysis
these are encapsulated but also they do not produce?
spores
Recall CFUs decrease over time because
fastidious
oxidase positive or negative?
positive
exceptions
– B. bronchispetica is motile
– B. parapertussis has brown pigment
– B. bronchiseptica & rare Bordetella spp can grow on MacConkeys
who are resevoirs?
Adults, adolescents & older children = reservoir
Dz in unimmunized (too young, no immune system)
– esp < 1 yr
– < 6 mos most at risk
Clinical Pertussis Sx
> Prolonged cough
Distinct whoop, infants
CFU #’s decrease over time
Lymphocytosis
Infectious ~3 wks
– Most non-infx by 4 wks
– 90% non-infx by 5wks
Lower respiratory tract, large airway dz
what distinct shape does pertussis have?
CLUB