Clinical Microbiology 2024, Exam Elaboration

Clinical Microbiology 2024, Exam Elaboration Media used to culture Mycobacterium tuberculosis include: - Correct Answer: Lowenstein-Jensen agar and Middlebrook 7H11 agar A Gram-negative bacillus has been isolated from feces, and the confirmed biochemical reactions fit those of Shigella. The organism does not agglutinate in Shigella antisera. What should be done next? a test the organism with a new lot of antisera b test with Vi antigen c repeat the biochemical tests d boil the organism and retest with the antisera - Correct Answer: d boil the organism and retest with the antisera Colds and other acute respiratory diseases are most often associated with: - Correct Answer: Adenovirus "Nutritionally variant" streptococci are: a enterococci b group D enterococci c beta hemolytic streptococci d in the genera Granulicatella and Abiotrophia - Correct Answer: d in the genera Granulicatella and Abiotrophia What Mycobacterium does not usually fluoresce when stained with a fluorescent stain? - Correct Answer: Mycobacterium fortuitum Psittacosis is transmittable to man via contact with: a insects b birds c cattle d dogs - Correct Answer: b birds Clinical resistance to penicillin correlates most frequently with beta-lactamase production in: a Chlamydia trachomatis b Neisseria gonorrhoeae c Neisseria meningitidis d Treponema pallidum - Correct Answer: b Neisseria gonorrhoeae