Haemophilus, histophilus, avibacterium Flashcards
1
Q
haemophilus info
A
- gram negative, coccobacillary rods (pleiomorphic)
- non-motile, non-spore forming
- aerobic and facultatively anaerobic
- capsule
- require one or both of X or V factor
2
Q
X and V factors
A
- haemophilus
- X: haemin
- V: coenzyme 1 –> NAD+
3
Q
is haemophilus commensal or pathogenic
A
- most are commensals on mucus membranes of upper digestive, respiratory, and genital tracts
- some are potential pathogens
4
Q
modes of haemophilus infection
A
- inhalation
- fomites
5
Q
9 species of haemophilus
A
- parasuis
- ovis
- haemoglobinophilus
- influenzae
- parainfluenzae
- felis
6
Q
haemophilus parasuis
A
- normal inhabitant of porcine respiratory tract
- opportunist pathogen
- requires only V factor
- animals under stress
- glasser’s disease
7
Q
glasser’s disease
A
- haemophilus parasuis (pigs)
- fibrinous inflammation of serous membranes, lesions on pericardium, pleura, peritoneum, joints
- young pigs under stress
- polyserositis
- vaccination available
8
Q
histophilus somni
A
- infectious thromboembolic meningioencephalitis (TEME) in cattle
- CNS involvement, respiratory distress, joint/coordination issues
- does not require X and V factors
- colonizes nasal cavity, gets into blood –> bacteremia, cerebral thrombus
- reproductive failures, endometritis, abortion
9
Q
predisposing factors for TEME
A
- stress of shipping
- climatic change
- crowded conditions
10
Q
avibacterium paragallinarum info
A
- requires both X and V factors
- gram negative, non-motile
- capsule, bipolar
- infectious coryza of chickens
11
Q
signs of avibacterium paragallinarum
A
- nasal discharge
- sneezing
- edema of the face
- drop in egg production
- high mortality
- birds can be carriers –> infection source
