The organism which is considered pathogenic if found in the throat is:
D) Streptococcus pyogenes
The most common organism found as normal flora of the skin is:
B) Staphylcoccus epidermidis
Several cases of bacterial meningitis occur in a college dorm. Neisseria meningitidis grows on culture. What is the most likely route of transmission?
C) respiratory droplets
All of the following bacteria produce a capsule with the exception of
A) Staphyloccucs aureus
Streptococcus agalactiae is the most common cause of:
C) sepsis and menigitis in newborn
Hemoptysis is a common sign of:
B) Mycobacterium tuberculosis
Leprosy is also referred to as:
D) Hansen's disease
Which species of Mycobacterium causes tuberculosis of the digestive tract from drinking unpasteurized milk from infected cows?
C) M. bovis
An AIDS patient has a reaction to PPD with a diameter of 5 mm. How would this test be interpreted?
a) negative
b) positive
b) positive
Which statement is not true of M. tuberculosis?
C) a positive skin test always indicates active disease
Which antibiotic group has the highest rate of allergic reactions?
D) penicillin
Kirby Bauer testing is useful for determining
A) which antibiotic may be employed to treat an infection
A patient is currently receiving ampicillin for an infection. The culture report comes back to the floor, and states that Staphylococcus aureus is in the culture site. The antibiotic sensitivity report will be available the next day. The antibiotic:
a) will probably work and shouldn't be changed
b) the doctor should be contacted immediately to change the antibiotic
b) the doctor should be contacted immediately to change the antibiotic
Vancomycin is used to treat infections caused by:
B) Methicillin resistant Staph aureus
Which of these bacteria are resistant to many antibiotics?
C) Serratia and Pseudomonas
Two bacteria are commonly seen together in acute necrotizing ulcerative gingivitis (ANUG), a serious periodontal disease. Fusobacterium or other anaerobic Gram negative rods are usually seen with the primary organism, which is:
A) Treponema vincenti
Peptostreptococcus are an anaerobic
C) Streptococcus
An intestinal normal flora bacteria that can overgrow and cause pseudomembranous colitis after antibiotics wipe out its competing flora is
A) Clostridum difficile
The physician suspects that his patient has diphtheria. Which of the following symptoms were observed?
D) pseudomembrane covering the pharynx causing difficulty breathing
A patient develops foul-smelling gaseous discharge following surgery for a perforated appendix. Culture of the discharge will most likely grow:
D) Clostridium perfringens
A chemical agent which halts bacterial growth but does not kill the cells would be termed:
A) bacteriostatic
Which of the following agents kills bacterial spores relatively quickly and is used in many hospitals?
D) Ethylene Trioxide Chamber (ETO)
This halogen class of agent is commonly used in the hospital as a skin antiseptic before starting an IV or drawing a blood culture.
A) iodophor (Betadine)
Commonly used antiseptics include all except:
B) formalin
Sporicidal soaks used for delicate instruments that cannot be autoclaved contain:
A) glutaraldehyde
Which of the following is the most common cause of urinary tract infections?
A) E. coli
Two food-borne pathogens commonly found in undercooked poultry are:
C) Salmonella and Campylobacter
This gram negative rod is a common water inhabitant often found among the flora of the intestinal tract. It has a green pigment, and commonly causes pneumonia in cystic fibrosis patients and infection in burn wounds.
B) Pseudomonas
This food-borne illness is so highly infective that as few as 10 ingested organisms can cause disease. It is commonly associated with seafood.
C) Shigella species
The lab tech is performing a colony count from a patient's midstream urine specimen. She used a .001 ml calibrated loop to inoculate the blood and EMB agar plates. She observes over 100 colonies on both the blood agar and the EMB agar. The report will read:
B) >100,000 colonies/mL of a probable gram negative rod