Question

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Which one of the following produces a tracheal cytotoxin resulting in a paroxysmal "whooping" cough and mucus accumulation that particularly affects infants and can cause brain damage? Select one: O a. Streptococcus pyogenes O b. Borrelia burgdorferi O c. Bordetella pertussis O d. Rubivirus O e. Mycobacterium tuberculosis

Answer 1

Answer

C) Bordetella pertussis

It causes whooping cough (pertussis), an acute respiratory infection marked by severe, spasmodic coughing episodes during the paroxysmal phase. Leukocytosis with lymphocytosis is also common during this phase of the illness. Dangerous complications are bronchopneumonia and acute encephalopathy. Bordetella parapertussis can cause a milder form of pertussis.

Transmission is by droplets. The bacteria colonize only ciliated cells of the respiratory mucosa, and they multiply rapidly. Bacteremia does not occur. The roles of the various toxins in pathogenesis are unclear.

True

Because Biochemical tests are among the most important methods for microbial identification. Microbial biochemistry tests shorten the time required to identify microbes, reduce costs, and ensure or enhance the accuracy of identification of an unknown sample. It is the fastest developing trend in microbial identification.