Question 1

The examination of spinal fluid may reveal the parasitic agent of meningoencephalitis called

Accepted Answer

A) Ascaris lumbricoides. 
B) Strongyloides stercoralis. 
C) Paragonimus westermani. 
D) Naegleria fowleri. 
A) Ascaris lumbricoides. 
B) Strongyloides stercoralis. 
C) Paragonimus westermani. 
D) Naegleria fowleri.

Question 2

Match the parasite with the best diagnostic specimen type.
-Plasmodium falciparum

Accepted Answer

A) Feces 
B) Blood smear 
C) Vaginal secretions 
D) CSF 
E) Skin scraping 
A) Feces 
B) Blood smear 
C) Vaginal secretions 
D) CSF 
E) Skin scraping

Question 3

An amoebic trophozoite that can be described as 12 to 15 microns, with no nuclear peripheral chromatin, a large karyosome, and coarsely granular and highly vacuolated cytoplasm would most likely be

Accepted Answer

A) Entamoeba histolytica. 
B) E.coli. 
C) Iodamoeba bütschlii. 
D) E.hartmanni. 
A) Entamoeba histolytica. 
B) E.coli. 
C) Iodamoeba bütschlii. 
D) E.hartmanni.

Question 4

The direct wet mount as part of the O&P (ova and parasite) examination

Accepted Answer

A) requires freshly passed, unpreserved stool. 
B) is designed to allow detection of motile helminth ova. 
C) is examined microscopically at low, high dry, and oil immersion magnifications. 
D) is performed for specimens received in the laboratory in stool collection preservatives. 
E) All of the above are correct. 
A) requires freshly passed, unpreserved stool. 
B) is designed to allow detection of motile helminth ova. 
C) is examined microscopically at low, high dry, and oil immersion magnifications. 
D) is performed for specimens received in the laboratory in stool collection preservatives. 
E) All of the above are correct.

Question 5

Match the parasite with the best diagnostic specimen type.
-Iodamoeba bütschlii

Accepted Answer

A) Rectal tape prep 
B) Tissue biopsy 
C) Sputum 
D) Feces 
E) Blood smear 
A) Rectal tape prep 
B) Tissue biopsy 
C) Sputum 
D) Feces 
E) Blood smear

Question 6

Match the parasite with the best diagnostic specimen type.
-Ascaris lumbricoides

Accepted Answer

A) Rectal tape prep 
B) Tissue biopsy 
C) Sputum 
D) Feces 
E) Blood smear 
A) Rectal tape prep 
B) Tissue biopsy 
C) Sputum 
D) Feces 
E) Blood smear

Question 7

A flagellate trophozoite that can be described as 9 to 12 μm, with one to two nuclei with no nuclear peripheral chromatin, a karyosome composed of four to eight large granules, and finely granular cytoplasm would most likely be

Accepted Answer

A) Giardia lamblia. 
B) Dientamoeba fragilis. 
C) Iodamoeba bütschlii. 
D) Chilomastix mesnili. 
A) Giardia lamblia. 
B) Dientamoeba fragilis. 
C) Iodamoeba bütschlii. 
D) Chilomastix mesnili.

Question 8

When amebiasis is strongly indicated but no parasitic forms are detected from any of three submitted fecal samples, the next step might be

Accepted Answer

A) to diagnose based on clinical findings and begin treatment. 
B) to collect material obtained from sigmoidoscopy and examine for parasites. 
C) to collect another series of three fecal samples and submit for parasitic examination. 
D) to collect duodenal drainage and examine for parasites. 
A) to diagnose based on clinical findings and begin treatment. 
B) to collect material obtained from sigmoidoscopy and examine for parasites. 
C) to collect another series of three fecal samples and submit for parasitic examination. 
D) to collect duodenal drainage and examine for parasites.

Question 9

Match the parasite with the best diagnostic specimen type.
-Isospora belli

Accepted Answer

A) Feces 
B) Blood smear 
C) Vaginal secretions 
D) CSF 
E) Skin scraping 
A) Feces 
B) Blood smear 
C) Vaginal secretions 
D) CSF 
E) Skin scraping

Question 10

The permanent stained smear part of the O&P (ova and parasite) examination

Accepted Answer

A) requires freshly passed, unpreserved stool. 
B) is designed to allow detection of protozoan cysts, coccidian oocysts, microsporidial spores, and helminth eggs and larvae. 
C) is examined microscopically at low, high dry, and oil immersion magnifications. 
D) is designed to facilitate identification of intestinal protozoa. 
E) All of the above are correct. 
A) requires freshly passed, unpreserved stool. 
B) is designed to allow detection of protozoan cysts, coccidian oocysts, microsporidial spores, and helminth eggs and larvae. 
C) is examined microscopically at low, high dry, and oil immersion magnifications. 
D) is designed to facilitate identification of intestinal protozoa. 
E) All of the above are correct.

Question 11

Match the parasite with the best diagnostic specimen type.
-Trichinella spiralis

Accepted Answer

A) Rectal tape prep 
B) Tissue biopsy 
C) Sputum 
D) Feces 
E) Blood smear 
A) Rectal tape prep 
B) Tissue biopsy 
C) Sputum 
D) Feces 
E) Blood smear

Exam 46: Laboratory Methods for Diagnosis of Parasitic Infections

The examination of spinal fluid may reveal the parasitic agent of meningoencephalitis called

Match the parasite with the best diagnostic specimen type. -Plasmodium falciparum

An amoebic trophozoite that can be described as 12 to 15 microns, with no nuclear peripheral chromatin, a large karyosome, and coarsely granular and highly vacuolated cytoplasm would most likely be

The direct wet mount as part of the O&P (ova and parasite) examination

Match the parasite with the best diagnostic specimen type. -Iodamoeba bütschlii

Match the parasite with the best diagnostic specimen type. -Ascaris lumbricoides

A flagellate trophozoite that can be described as 9 to 12 μm, with one to two nuclei with no nuclear peripheral chromatin, a karyosome composed of four to eight large granules, and finely granular cytoplasm would most likely be

When amebiasis is strongly indicated but no parasitic forms are detected from any of three submitted fecal samples, the next step might be

Match the parasite with the best diagnostic specimen type. -Isospora belli

The permanent stained smear part of the O&P (ova and parasite) examination

Match the parasite with the best diagnostic specimen type. -Trichinella spiralis

Microbial Taxonomy

Bacterial Genetics Metabolism and Structure

Host-Microorganism Interactions

Laboratory Safety

Specimen Management

Role of Microscopy

Traditional Cultivation and Identification

Nucleic Acid-Based Analytic Methods for Microbial Identification and Characterization

Immunochemical Methods Used for Organism Detection

Serologic Diagnosis of Infectious Diseases

Principles of Antimicrobial Action Resistance

Laboratory Methods and Strategies for Antimicrobial Susceptibility Testing

Staphylococcus, Micrococcus, and Similar Organisms

Streptococcus, Enterococcus, and Similar Organisms

Bacillus and Similar Organisms

Listeria, Corynebacterium, and Similar Organisms

Erysipelothirix, Lactobacillus, and Similar Organisms

Nocardia, Streptomyces, Rhodococcus, Oerskovia, and Similar Organisms

Enterobacteriaceae

Acinetobacter, Stenotrophomonas, and Other Organisms

Pseudomonas, Burkholderia, and Similar Organisms

Achromobacter, Rhizobium, Ochrobactrum, and Similar Organisms

Chryseobacterium, Sphingobacterium, and Similar Organisms

Alcaligenes, Bordetella Nonpertussis, Comamonas, and Similar Organisms

Vibrio, Aeromonas, Plesiomonas Shigelloides, and Chromobacterium Violaceum

Sphingomonas Paucimobilis and Similar Organisms

Moraxella

Eikenella Corrodens and Similar Organisms

Pasteurella and Similar Organisms

Actinobacillus, Kingella, Cardiobacterium, Capnocytophaga, and Similar Organisms

Haemophilus

Bartonella and Afipia

Campylobacter, Arcobacter, and Helicobacter

Legionella

Brucella

Bordetella Pertussis and Bordetella Parapertussis

Francisella

Streptobacillus Moniliformis and Spirillum Minus

Neisseria and Moraxella Catarrhalis

Overview and General Considerations

Laboratory Considerations

Mycobacteria

Obligate Intracellular and Nonculturable Bacterial Agents

Cell Wall-Deficient Bacteria: Mycoplasma and Ureaplasma

The Spirochetes

Laboratory Methods in Basic Mycology

Laboratory Methods in Basic Virology

Bloodstream Infections

Infections of the Lower Respiratory Tract

Upper Respiratory Tract Infections and Other Infections of the Oral Cavity and Neck

Meningitis and Other Infections of the Central Nervous Systems

Infections of the Eyes, Ears, and Sinuses

Infections of the Urinary Tract

Genital Tract Infections

Gastrointestinal Tract Infections

Skin, Soft Tissue, and Wound Infections

Normally Sterile Body Fluids, Bone and Bone Marrow, and Solid Tissues

Laboratory Physical Design, Management, and Organization

Quality in the Clinical Microbiology Laboratory

Infection Control

Sentinel Laboratory Response to Bioterrorism New

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