Exam 20: Serological and Molecular Detection of Bacterial Infections

The gold standard for diagnosing Rickettsia rickettsii infection is:

Which organism is difficult to culture because it lacks a cell wall?

Helicobacter pylori secretes urease to:

What is the main reason testing for cold agglutinins is no longer recommended to diagnose infection with Mycoplasma pneumonia?

Which of the following is an advantage of bacterial culture in diagnosing an infection?

The pathogenesis of poststreptococcal glomerulonephritis involves:

Complement helps in the defense against bacterial invasion by:

Which bacterium does not cause fever?

Which of the following illnesses is not caused by Streptococcus pyogenes directly,but rather by destructive host defense responses?

A primary disadvantage of using serology in the diagnosis of an infection is:

The advantage of microscopic visualization in bacterial diagnosis is that the method is:

Which statement regarding exotoxins and endotoxins is true?

The cold agglutinins that develop in patients infected with Mycoplasma pneumoniae are:

Which bacterium is transmitted via the fecal-oral route?

Which bacterium is transmitted to humans via tick or flea bites?

Obligate intracellular,gram-negative bacteria best describes:

An anti-streptolysin O enzyme inhibition test was performed on the serum of a 10-year-old female patient with the following results: no hemolysis in the 1:10,1:20,1:40,and 1:80 tubes; hemolysis in the 1:160,1:320,and 1:640 tubes.What conclusion can you draw from these results?

Identify the true statement about exotoxins.

Antibodies against streptolysin O,hyaluronidase,and DNase B are measured in the diagnosis of which disease?

Select the true statement about Helicobacter pylori.