ABMM 무료 덤프문제 온라인 액세스

A foodborne outbreak is suspected after several individuals who attended a potluck dinner develop nausea, vomiting, and abdominal cramps within 1-6 hours of eating. No fever or diarrhea is reported. The MOST likely bacterial toxin involved is:

• A.Botulinum toxin
• B.Shiga toxin
• C.Clostridium perfringens enterotoxin
• D.Staphylococcal enterotoxin

A clinical microbiology laboratory is using CRISPR-based technology for rapid and sensitive detection of specific bacterial DNA sequences directly from patient samples. This method relies on the ability of the Cas enzyme to:

• A.Detect the presence of specific antibodies produced in response to bacterial infection.
• B.Specifically bind to and cleave target DNA sequences guided by a short RNA molecule.
• C.Amplify target DNA sequences using specific primers and thermal cycling.
• D.Reverse transcribe RNA into complementary DNA.

A patient develops a severe gastrointestinal illness after consuming undercooked poultry. Stool culture yields a Gram-negative, microaerophilic, curved bacillus that is oxidase-positive. The MOST likely organism is:

• A.Shigella dysenteriae
• B.Salmonella enterica
• C.Campylobacter jejuni
• D.Yersinia enterocolitica

A clinical microbiology laboratory is preparing a Gram stain of a mixed bacterial culture containing both Gram-positive and Gram-negative organisms. The correct order of reagents used in the Gram staining procedure is:

• A.Decolorizer, crystal violet, iodine, safranin
• B.Safranin, crystal violet, decolorizer, iodine
• C.Crystal violet, iodine, decolorizer, safranin
• D.Iodine, crystal violet, decolorizer, safranin

Vancomycin resistance in Enterococcus faecium, mediated by the vanA gene cluster, results from:

• A.Modification of the drug target from D-alanyl-D-alanine to D-alanyl-D-lactate
• B.Efflux pump overexpression removing vancomycin from the cell
• C.Enzymatic inactivation of vancomycin by phosphorylation
• D.Decreased outer membrane permeability to vancomycin