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dwt test 2 > bacteriology 10 > Flashcards

bacteriology 10 Flashcards

1
Q

shared features of pasteurellaceae

A

gram negative rods (short rods or coccobacilli)
facultatively anaerobic (Some like increased CO2)
oxidase positive
most are non-motile
grow in blood agar-except histophilus, glaserella, avibacterium (chocolate agar)
variable growth on macconkey agar even though gram negative

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2
Q

primary species of importance for pasteurellaceae

A

pasteurellaceae multocida

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3
Q

where is pasteurellaceae

A

normal flora of mucus membranes of animals and birds
URT (nasal cavity and nasopharynx)
digestive track
lower genital tract
some carrier animals and birds-URT (nasal cavity and nasopharynx)
none survive in the environment for a long time

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4
Q

pasteurellaceae transmitted

A

occur in site near where these bacteria occurs as part of the normal flora
transmission by
inhalation
direct inoculation either locally or systemically

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5
Q

how do pasteurellaceae cause disease

A

attachement-fimbriae (pili) or adhesins
avoidance of phagocytosis-Capsule- 5 types of capsule in P. multocida
cellular toxicity-exotoxin-large role in disease
local and systemic effects-endotoxin
opportunistic infection
some disease caused by P multocida, host and environment factor plat less of a role
strains involved are not normally part of the NF and are better pathogens

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6
Q

pasteurellacease risk factors

A

age
co-mingling
crowding or indoors
other infection (1 degree viral)
poor weather

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7
Q

diseased do pasturellaceae cause

A

pasteurella multocida-pneumonia, rhinitis, bite wound, septicemia
mannheimia haemolytica-pneumonia/bronchopneumonia, necrotizing mastitis and septicemia
actinobacillus spp.-actinobacillus equuli, actinobacillus lignieresii, actinobacillus pleuopneumoniae, actinobacillus suis
glaeserella parasuis-bronchopneumonia and glasser disease
histophilus somni-respiratory disease, thrombotic meningoencephalitis, reproductive failure
avibacterium paragallinarum-fowl (infectious) coryza

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8
Q

pasteurella multocida-pneumonia

A

most important disease caused by pasteurella
wide range of animal species
BRDC or shipping fever

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9
Q

pasteurella multocida-rhinitis and atrophic rhinitis

A

respiratory disease in rabbits
snuffles
mucopurulent discharge that occludes nares and conjunctiva

young pigs (3-7wks)
combined effects of two bacteria-pasteurella multocida type D and bordetella bronchiseptica

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10
Q

pasteurella multocida-wound infection

A

bite wounds or licking open woulds
oral flora (mixed infection)-pasteurella and strict anaerobes
cat bits are more commonly infected than dog bites

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11
Q

pasteurella multocida-septicemia

A

not usually normal flora (present in carriers and not not require much host compromise
bovine hemorrhagic septicemia-associated with certain capsule (B and E)-exotic to USA
fowl cholera-chicken and causes large disease outbreak

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12
Q

mannheimia haemolytica-pneumonia/bronchopneumonia

A

shipping fever
enzootic pneumonia in sheep and goats

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13
Q

mannheimia haemolytica-necrotizing mastitis

A

in ewe (blue bag) lambs give to ewes when suckling
damage due to leucotoxin-necrotizing

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14
Q

mannheimia haemolytica-septicemia

A

lambs

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15
Q

actinobacillus equuli

A

horses, pigs and calves
sleepy foal-septicemia in neonatal foals
peritonitis in adult horses
pneumonia and pleuropneumonia

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16
Q

actinobacillus lignieresii

A

wooden tongue
ruminants (Sheep and cattle)
result of trauma to oral cavity
multiple pyogranulomatous abscessed

17
Q

actinobacillus pleuopneumoniae

A

predominantly a pathogen of pigs
grower and finisher pigs
predisposing: crowding, poor ventilation
causes severe fibrinous pneumonia and pleuritis-subclinical to acute, lesions are hemorrhagic and necrosis

18
Q

actinobacillus suis

A

septicemia in pigs
1-8 weeks old
invasion of respiratory tract
edema and petechiae

19
Q

goaeserella parasuis

A

pigs
bronchonpneumonia-2nd to viral/mycoplasma infection
glasser disease
septicemia and polyserositis- inflammation of multiple serosal surfaces

20
Q

goaeserella parasuis

A

pigs
bronchonpneumonia-2nd to viral/mycoplasma infection
glasser disease
septicemia and polyserositis- inflammation of multiple serosal surfaces
caused by stress

21
Q

histophilus somni

A

a pathogen of cows
invades and disseminates via the bloodstream
respiratory disease
thrombotic meningoencephalitis
reproductive failure

22
Q

avibacterium paragallinarum

A

fowl (infectious coryza)
primary in chickens
URT
sneezing and facial swelling

23
Q

how to diagnose pasteurellaceae

A

sampling from sterile sites
transportation to the lab ASAP
some of these bacteria have specific cultural requirements
PCR for A. pleuopneumoniae, A suis and toxigenic strains of P multocida (Atrophic rhinitis)

dwt test 2 (24 decks)

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