In concentration methods for acid fast bacilli, the sputum must be:

Plasmodium falciparum:

The preferred laboratory method for diagnosing relapsing fever is:

The Weil-Felix reaction used to identify rickettsial infections is based on agglutination with strains of:

The Mycobacterium species that can be cultured only in mouse footpads or armadillos:

What is the advantage of low pH SAB?

Two OF tubes are removed from the incubator. The tubes do not contain a mineral oil overlay and caps are loose. The tech notices that both tubes have turned yellow. What can be concluded about this test?

The organism that is commonly associated with the production of cold agglutinins is:

Terminal spores are commonly seen in gram stains of what organism?

A thin anaerobic gram negative bacillus with tapered ends was isolated from an empyema and was found to be indole positive, lipase negative, and inhibited by 20% bile.  Colonies were described as “speckled” or resembling “ground glass” and fluoresced weakly when exposed to UV light.  The most probable identification of this isolate would be: