Real American Society of Microbiology ABMM practice exam questions for easy pass!
Updated: Aug 03, 2026
No. of Questions: 204 Questions & Answers with Testing Engine
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| Certification Vendor: | American Society for Microbiology (ASM) - American College of Microbiology |
| Exam Name: | ABMM Certification Examination (American Board of Medical Microbiology) |
| Exam Number: | ABMM |
| Related Certifications: | American Board of Medical Laboratory Immunology (ABMLI) |
| Available Languages: | English |
| Exam Format: | Written Examination, Oral Examination (may be required depending on candidate pathway), Credential/Document Review |
| Sample Questions: | American Society of Microbiology ABMM Sample Questions |
| Exam Way: | In-person examination (location varies; administered under ASM certification program policies). |
| Pre Condition: | Doctoral degree (PhD, MD, or equivalent) in microbiology or a related biomedical field, plus relevant clinical microbiology training/experience. |
| Section | Objectives |
|---|---|
| Infectious Disease Principles | - Pathogenesis
|
| Laboratory Operations | - Instrumentation and methodologies
|
| Clinical Microbiology | - Mycology
|
| Laboratory Management & Quality Systems | - Quality assurance and quality control
|
1. Vancomycin resistance in Enterococcus faecium, mediated by the vanA gene cluster, results from:
A) Decreased outer membrane permeability to vancomycin
B) Modification of the drug target from D-alanyl-D-alanine to D-alanyl-D-lactate
C) Efflux pump overexpression removing vancomycin from the cell
D) Enzymatic inactivation of vancomycin by phosphorylation
2. A Gram stain of cerebrospinal fluid (CSF) from a 2-year-old child with meningitis shows small, pleomorphic Gram-negative coccobacilli. Culture on chocolate agar yields growth, but there is no growth on standard 5% sheep blood agar unless streaked near a colony of Staphylococcus aureus. This phenomenon indicates a requirement for which growth factor(s)?
A) Both Factor X and Factor V
B) Factor X (hemin) only
C) Factor V (NAD) only
D) Cysteine and pyridoxal
3. A patient develops a febrile illness with a diffuse petechial rash after a camping trip. Serological testing reveals a four-fold rise in antibody titer to Rickettsia rickettsii. The vector responsible for transmitting this organism is a:
A) Mosquito
B) Flea
C) Tick
D) Louse
4. A patient with HIV infection and a low CD4+ T-cell count presents with fever, weight loss, and cough. Chest X-ray shows diffuse interstitial infiltrates. Sputum induction reveals oval yeast cells with narrow-based budding. The MOST likely diagnosis is:
A) Pneumocystis pneumonia
B) Histoplasmosis
C) Tuberculosis
D) Cryptococcosis
5. A clinical microbiology laboratory is investigating a cluster of Clostridium difficile infections in a hospital.
Which of the following methods is MOST appropriate for determining if the isolates from different patients are related?
A) Molecular typing (e.g., PCR ribotyping)
B) Antimicrobial susceptibility testing
C) Gram staining and morphology
D) Enzyme immunoassay for C. difficile toxins
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: C | Question # 3 Answer: C | Question # 4 Answer: B | Question # 5 Answer: A |
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