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pasteurella
Stack #37129
| Question | Answer |
|---|---|
| definition of pasteurella | small gram negative rods/coccobacilli; bipolar staining |
| what are the 3 main species of pasteurella | pasteurella multocida, mannheimia haemolytica, pasteurella trehalosi |
| mannheimia is AKA... | pasteurella haemolytica type A |
| pasteurella trehalosi is AKA... | mannheimia haemolytica type T |
| what is the habitat of pasteurella | commensals of URT, alimentary tract, and mouth |
| parasitic potential of pasteurella | obligate parasite |
| which pasteurella spp inhabitate only ruminants | mannheimia haemolytica and pasteurella trehalosi |
| what is the most important morphological characteristic of pasteurella | bipolar staining therefore safety pin appearance |
| what stain is used to render the bipolar staining of pasteurella | giemsa |
| pasteurella multocida growth on macconkey agar | negative |
| pasteurella multocida type of hemolysis | negative |
| pasteurella spp which grow on macconkeys agar | mannheimia haemolytica and pasteurella trehalosi |
| pasteurella spp which exhibit beta hemolysis | mannheimia haemolytica and pasteurella trehalosi |
| how many serogroups are present in pasteurella multocida | 4- A, B, D, E |
| what does P multocida serogroup A cause | fowl cholera |
| what does P multocida serogroup B cause | hemorrhagic septicemia in asia |
| what does P multocida serogroup D cause | atrophic rhinitis in pigs |
| what does P multocida serogroup E cause | hemorrhagic septicemia in africa |
| how many serotypes does M haemolytica have | 12 "O" serotypes |
| how many serotypes does P trehalosi have | 4 "O" serotypes |
| what bacterial factors does pasteurella have | capsules, fimbriae, endotoxin, exotoxin |
| what is the cause of dermonecrosis | P multocida type D |
| describe the exotoxin of P multocida type D | dermonecrotic, cytotoxic, osteoblast inhibitor, osteoclast stimulant |
| describe the exotoxins of M haemolytica | RTX family, leucotoxin, antiphagocytic, antilymphocyctic |
| what is RTX family | repeating |
| what are the 2 host factors of pasteurella | stress and intercurrent disease |
| name the 4 diseases of P multocida | septicemia, pneumonia, rhinitis, wound infections |
| what is the cause of hemorrhagic septicemia in cattle | P multocida type B and type E |
| what is the tendancy for Hemorrhagic septicemia via P multocida | epidemic/sporadic |
| what is the severity of hemorrhagic septicemia via P multocida | peracute/acute |
| what does M haemolytica predominantly cause in cattle | pneumonia |
| common names of the pneumonia caused by M haemolytica in cattle | stockyards pneumonia, shipping fever, transit fever |
| what other bacteria is M haemolytica associated with when it comes to causing pneumonia | associated with H somnus |
| what dz does M haemolytica cause in sheep | septicemia |
| septicemia in sheep caused by M haemolytica affects what age range | young (lambs < 3 m) |
| what disease does P trehalosi cause in sheep | septicemia |
| septicemia caused by P trehalosi in sheep affects what age range | older (5 and >) |
| what 2 bacteria can cause pneumonia in sheep | M haemolytica or P multocida |
| pneumonia in sheep caused by M haemolytica or P multocida affects what age range | all ages |
| describe pasteurella pneumonia | acute fibrinous, pleurisy, sometimes with pericarditis |
| blue bag | mastitis in sheep caused by M haemolytica |
| is blue bag in sheep an ascending infection or descending infection | ascending infection |
| how is blue bag in sheep's infection aided | by trauma (head butting) |
| what causes atrophic rhinitis in pigs | P multocida type D and B bronchiseptica |
| what bacteria from the pasteurella family predominantly causes pneumonia in pigs | P multocida A and D |
| what does P multocida cause in pigs | atrophic rhinitis, pneumonia, septicemia |
| what age of pigs are affected with septicemia caused by P multocida | neonatal, juvenile |
| what causes fowl cholera in poultry | P multocida type A |
| what is the pathogenicity behind fowl cholera | septicemia-acute/peracute |
| is fowl cholera worse in turkeys or chickens | turkeys |
| what is a predominant physical cause of fowl cholera | stress |
| describe fowl cholera in chickens | usually chronic and respiratory |
| what causes 'snuffles' in rabbits | P multocida |
| describe the pathogenesis of snuffles in rabbits | purulent rhinitis |
| what is the lab diagnosis technique for pasteurella spp | demonstrate the organism by bipolar staining |
Created by:
pferdyvet
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