ZOONOTIC Flashcards
What causes cutaneous larval migration in humans?
The correct answer is Ancylostoma. These are hookworms; when they come in contact with unprotected skin, the infective larvae penetrate the epidermis but generally cannot penetrate the basement membrane. They therefore migrate aimlessly, and the disease is usually self-limiting in humans.
What disease agents has been transmitted to humans through consumption of eggs?
SE can set up chronic infections in asymptomatic chickens and infect the egg. It is initially only on the embryo but if eggs are not refrigerated the yolk membrane weakens and the Salmonella enters the yolk where it multiplies and can be a significant public health problem.
Bovine spongiform encephalopathy (BSE or mad cow disease) is not only a health concern for the management of cattle but also has potential public health implications if bovine nervous tissue from infected cows is consumed by humans. BSE has been implicated in a condition that mimics which of the following human diseases?
BSE is a transmissible spongiform encephalopathy suspected to be caused by a prion.
True Creutzfeldt-Jakob disease (CJD) is a rare disorder that can occur due to a genetic mutation or may occur sporadically. Patients may experience psychiatric symptoms such as depression or a schizophrenia-like psychosis. Unusual sensory symptoms may also occur. Neurological signs progress to difficulty walking and involuntary movements, and, by the time of death, patients become completely immobile and mute.
Variant Creutzfeldt-Jakob disease (vCJD) typically affects younger people and has been strongly linked to exposure, probably through food, to cattle BSE.
Who is a good senitel animal for Rocky Mountain Spotted Fever?
Dogs
In the U.S., swine tuberculosis is most commonly associated with exposure to materials (feed, water, bedding) contaminated by what animals?
The correct answer is birds. Swine TB is very rare in the U.S. due to modern hog production practices. Bovine TB is still present but is not very common either. Deer can serve as a source to contaminate water but is not as common. Most cases of TB in swine today is cause by avian TB. Most swine outbreaks today are traced back to contaminated water (use of surface water such as ponds or lakes) or bedding.
