Flashcards in Zoonosis Deck (22)
An indicator of the presence of disease.
What's the intermediate host of Taenia solium?
What is the causative agent of rabies?
Lyssavirus (RNA virus)
What is the reservoir for rabies?
carnivores and bats.
What is the reservoir for hantavirus?
rodents - usually asymptomatic
In what way(s) is(are) hantavirus transmitted?
Primary - aerosol (rodent urine or feces)
Secondary - bites by rodents
In what ways can humans contract anthrax?
Cutaneous - spores enter open wound OR biting fly
Ingestion - infected animals
What are the postmortem signs of anthrax in cattle?
anticoagulopathy, rapid bloating, lack of rigor mortis, bleeding from orifices
What steps should be taken when a vet encounters a potential anthrax case?
1.) NO NECROPSY
2.) Burn or bury carcasses
3.) Inform public health officials.
What are the signs/symptoms of Brucellosis infection (AKA: undulant fever or Malta fever or Bang's Dz)?
Recurring fever, can last for months
Pleiomorphic symptoms: neurologic, endocarditis, chronic fatigue.
How is Brucellosis/undulant fever/Malta fever/Bang's Disease transmitted?
Ingestion, mucous membrane exposure, or percutaneous inoculation with:
Aborted placenta, fetus or fetal fluids
Can be also found in blood, urine, semen, feces, and uterine/vaginal secretions
Feed/water contaminated with these materials.
What are some methods currently being implemented to prevent the spread of Brucella?
Eliminate the animal reservoir
Swine monitored (abattoir-based)
Reduce public exposure through pasteurization of milk and milk used to make soft cheeses
Brucella melitensis: what species are affected, where is it found and how bad is it for people?
Goats; also sheep, caribou, reindeer, pigs, dogs
Mostly found in the Mediterranean and other intensive goat-farming regions
Most pathogenic for people
Brucella abortus: What species are affected, where is it found and how bad is it for people?
Cattle; also bison, buffalo, elk, horses, dogs
Worldwide distribution, except where eradication programs have been successful
Less pathogenic than melitensis, but more pathogenic than other strains.
What are the two zoonotic diseases caused by borrelia spp and what is the vector for each?
Lyme disease type - hard ticks
Relapsing fever type - soft ticks
What is the reservoir for Borrelia burgdorferi?
Usually sylvatic ("forest-dwelling) rodents, sometimes lizards (regional)
In which species does Borrelia burgdorferi cause disease?
People, dogs, horses
What are the signs/symptoms of Borrelia burgdorferi infection? Chronic dz manifestations?
Acute febrile illness, myalgia, arthralgia
Chronic dz manifestations: CV, neurological, joint problems
What's the causative agent of West Nile?
In what species is West Nile Virus maintained?
Birds - mosquitos
How is West Nile Virus transmitted?
Secondary transmission: bloodborne infection, laboratory exposure, breast milk (NOT handling dead birds).