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19 Cards in this Set
- Front
- Back
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What is the agent that causes salmon poisoning disease? What transmits it?
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Neorickettsia helminthoeca
-Helminth transmitted rickettsial disease of Canidae |
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Neorickettsia helminthoeca are closely related to ___ and ____, but are more closely related to ______.
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-closely related to Ehrlichia and anaplasma
-more closely related to Neorickettsia risticii which causes potomac horse fever |
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What disease is very similar to salmon poisoning but is not as severe? How are they different?
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Elokomin fluke fever
-potentially another strain of N. helminthoeca -Wider host range and low mortality |
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Do cats get rickettsial disease?
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NOPE
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What is the distribution of salmon poisoning disease?
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Western slopes of the cascades
-we have it here |
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*What is the vector for Neorickettsia helminthoeca?
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Trematode Nanophyetus salmincola
-harbors all stages of N. helminthoeca |
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What 3 hosts are required for completly of the trematode life cycle (Nanophyetus salmincola)?
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1) Snail (coastal areas)
2) fish -salmonids, some non-salmonids and giant salamander 3) Mammal or bird -dogs develop disease |
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How are dogs infected with Neorickettsia helminthoeca?
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Eating metacercariae infested fish
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How long does it take for adult trematodes to develop in a dog that ate a metacercariae infested fish?
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6 days
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What happens after the adult trematodes develop in a dog?
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Adults attach to intestine and inoculate the rickettsia
-may cause mild enteritis |
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Where do Neorickettsia go once they enter the blood stream?
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Lymph nodes, spleen, thymus, liver, lungs, brain
-cause of death not known |
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*** How long is the incubation period of salmon poisoning disease?
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5-*7 days
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What is one of the primary signs of salmon poisoning disease?
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Higher fever (104-107.6) that normalizes in 4-8 days
-patients often hypothermic before they die -progressive vomiting and diarrhea |
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How does the course of Elokomin fluke fever vary from salmon poisoning disease?
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-Incubation: 5-12 days
-Fever in plateau lasting 4 to 7 days |
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What are the lab changes associated with salmon poisoning disease?
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non-specific
-thrombocytopenia (88%) -Eosinophilia (77%) |
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What are 2 methods used to diagnose salmon poisoning disease?
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1) Trematode eggs can be identified in feces
2) FNA of affected lymph nodes -intracytoplasmic rickettsia in mononuclear cells |
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When can you find the trematode eggs in a fecal when trying to diagnose salmon poisoning disease?
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5-8 days after ingestion of infected fish
-direct smear or washing sedimentation techniques |
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What is the therapy for salmon poisoning disease?
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-Supportive therapy
-Antibiotics for rickettsia (tetracycline) -praziquantel for the N. salmincola -in-hospital |
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What are 2 ways to prevent salmon poisoning disease?
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1) Avoid raw fish
-Metacercariae can remain viable for months in rotting fish carcasses 2) freezing fish at -20 C for 24 hours kills the metacercariae and the rickettsia |
