Which one of the following diseases is not correctly matched to its reservoir?
A) treponema-animal
B) rabies-animal
C) botulism-nonliving
D) typhoid fever-nonliving
E) toxoplasmosis-cats
Which of the following is not one of Koch's postulates?
A) The same pathogen must be present in every case of the disease
B) The pathogen must be isolated and grown in pure culture from the diseased host
C) The pathogen from pure culture must cause the disease when inoculated into a healthy, susceptible laboratory animal
D) The disease must be transmitted from a diseased animal to a healthy, susceptible animal by some form of contact
E) The pathogen must be isolated in pure culture from an experimentally infected lab animal
The emergence of new infectious diseases is probably due to all of the following except
A) the need of bacteria to cause disease
B) the ability of humans to travel by air
C) a pathogen crossing the species barrier
D) the increasing human population
E) changing environments (e.g., flood, drought, pollution)
Answer (1)
The mismatched disease-reservoir pair is treponema-animal, as Treponema is primarily associated with humans. In Koch's postulates, the incorrect option is that diseases must be transmitted by contact. Lastly, the emergence of new infectious diseases is not due to bacteria's need to cause disease. ;
