Zoonoses Flashcards
Can bats infect humans with Henra?
No, need horses as an intermediate host
Under what conditions can Borrelia recurrentis be transmitted between humans?
Close unhygienic contact
What is the natural host of Rickettsia?
Arthropod
What is the intermediate host for SARS?
Palm civets
What is the intermediate host for MERS?
Camels
What can bubonic plague be caused by initially?
Flea bite
When does bubonic plague become infectious?
When it infects the respiratory system
What is the natural host of plague?
Wild rodents
What bacteria causes plague?
Yersinia pestis
Why can bubonic plague become systemic?
It infects lymph nodes
How does Y. pestis manipulate the flea (Xenopsylla cheopis)?
Forms a blood clot in the GI tract to starve the flea so that it bites more
What disease does arenavirus cause?
Bolivian Haemorrhagic fever.
Why did arenavirus spread to humans from mice?
Use of DDT to kill mosquitos kill geckos that ate them, and subsequently cats, who ate geckos. Number of mice increased
What percentage of infectious pathogens are zoonotic?
61%
Which receptor does the dengue virus use?
Insulin receptor
