Exam 30: Vectorborne and Soilborne Bacterial and Viral Diseases

The causative agent of dengue fever is

Which of the following was an emerging mosquito-borne disease in the early 2000s but has now decreased in frequency?

The Black Plague has killed millions of humans over the course of history,yet we do not vaccinate against this disease.Why is this and how is the disease controlled in modern human populations?

Which rickettsial disease can be transmitted by contaminated milk?

Epizootic diseases often occur in wild animals on a periodic or cyclic basis.

Animal-transmitted diseases are generally spread to accidental hosts by

A person is MOST likely to contract diseases such as Rocky Mountain spotted fever and ehrlichiosis if he or she visits/participates in

Rickettsia prowazekii is transmitted to humans when a louse bite becomes contaminated with louse feces.

Anthrax is an emerging disease for which there is no treatment or vaccine available.

Certain Clostridium spp.can be found in the human gut,but Clostridium tetani is almost exclusively present in soil.

Soldiers or refuges in crowded unsanitary conditions are MOST susceptible to which rickettsial disease?

Hantaviruses are related to viruses such as ________ and ________.

A PCR assay has been developed for the detection of the bacterium (Borrelia burgdorferi)that causes Lyme disease.Unfortunately this method cannot differentiate between an active disease and a treated or inactive disease.

Which of the following diseases causes an influenza-like illness that can progress to include pneumonia?

Controlling most rickettsial diseases involves managing

Erythema migrans is associated with typhus.

If Lyme disease is not treated early,it can infect the central nervous system.

Hantaviruses are most commonly transmitted by ________ of virus-contaminated rodent ________.

There are several different virus-specific treatments and vaccines available to treat or prevent hantavirus infections.

Using a specific example,explain the term "accidental host."