bacteriology 10 Flashcards
shared features of pasteurellaceae
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
primary species of importance for pasteurellaceae
pasteurellaceae multocida
where is pasteurellaceae
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
pasteurellaceae transmitted
occur in site near where these bacteria occurs as part of the normal flora
transmission by
inhalation
direct inoculation either locally or systemically
how do pasteurellaceae cause disease
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
pasteurellacease risk factors
age
co-mingling
crowding or indoors
other infection (1 degree viral)
poor weather
diseased do pasturellaceae cause
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
pasteurella multocida-pneumonia
most important disease caused by pasteurella
wide range of animal species
BRDC or shipping fever
pasteurella multocida-rhinitis and atrophic rhinitis
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
pasteurella multocida-wound infection
bite wounds or licking open woulds
oral flora (mixed infection)-pasteurella and strict anaerobes
cat bits are more commonly infected than dog bites
pasteurella multocida-septicemia
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
mannheimia haemolytica-pneumonia/bronchopneumonia
shipping fever
enzootic pneumonia in sheep and goats
mannheimia haemolytica-necrotizing mastitis
in ewe (blue bag) lambs give to ewes when suckling
damage due to leucotoxin-necrotizing
mannheimia haemolytica-septicemia
lambs
actinobacillus equuli
horses, pigs and calves
sleepy foal-septicemia in neonatal foals
peritonitis in adult horses
pneumonia and pleuropneumonia