Clinical Microbiology
Gram Stain
Group A strep/STD
Urine Culture
Infection prevention/Emerging Infectious Diseases
100

What is a frequently seen protozan parasite detected in vaginal or urethral discharge?

Trichomonas vaginalis

100

What is the most common bacterial stain?

Gram stain

100

What is group A strep caused by?

Sreptococcus pyogenes 

100

What is the most common bacterial species responsible for UTI

E. Coli

100

A person who harbors an organism has no symptoms or signs of disease but is capable of spreading the organism to others

carrier 

200

Roundworms, flukes, hockworms, are common intestinal parasites what are they classified as

helminths 

200

The primary stain in the gram stain process is a dye called 

Crystal Violet

200

What type of specimen do you collect for group A strep?

Dacron Swab

200

What 2 types of media are sued for urine specimens?

Blood Agar

EMB or MAC


200

A CDC isolation category designed to prevent transmission of diseases spread by close or direct contact is ______

contact precautions 

300

Worldwide what is the most common blood parasite?

malarial parasite plasmodum 

300

Name (1)gram+ & (1)gram=  bacteria

Gram+--->Streptococcus pyogenes

                S. aureus

Gram= --->E. Coli

                  Pseudomonas species  

300

Clue cells are an indication of ____

Gardnerella 

300

Do gram-negative or gram-positive grow on EMB or MAC plates?

gram neg 
300

Development of multi-drug resistant strains of mycobacterium has allowed the reemergence of the disease_________

Tuberculosis

400

3 tests used to diagnose viruses?

viral culture

Immunoassays

Rapid tests

400

4 steps to the Gram Stain Procedure 

Primary Stain 

Grams Iodine 

Decolorizer

Counter stain 

400

What are the 3-side test for vaginitis?

Saline prep

KOH prep

Gram stain  

400
What is an indication the urine specimen was not a clean catch

presence of 3 or more different colonies 

400

3 things a Public Health crisis can be caused by

Hurricanes disrupting wastewater treatment 

A natural disaster creating environments where insects and pathogens can grow 

Hurricanes causing cholera contamination of food & H2O supplies 

500

What are 3 characteristics of yeasts?

Larger than bacteria

Eukaryote 

Reproduce by budding 

500

What is the difference between a direct & indirect gram stain

direct from specimen swab

indirect from culture 

500

What are 5 characteristics of group A streptococcus

1. Gram Positive 

2. Cocci grow in chains

3. enhanced growth 5% to 10% CO2

4. Blood agar Beta hemolysis 

5. Bacitracin sensitive 

500

What is considered a clinically significant colony count on a urine culture?

greater than or equal to 100,000/mL significant 


greater than or equal to 30,000/mL can be significant

500

3 Characteristics of potential biological threats 

High mortality 

ease of person-to-person transmission

major public health impact 

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