Bacteriology Review

Question 0

What gram (+) rod Is widespread among animals, usually food borne and affects immunodeficient population. Most common forms of infection are meningitis & septicemia

Answer 0

Listeria monocytogenes
Treat: ampicillin, or trimethoprim and sulfamethoxazole
Lab ID: blood agar; colony surrounded by zone of hemolysis

Question 1

What gram (+) organism appearing as grape like clusters is normally found on skin and mucus membranes and causes toxic shock, gastroenteritis, and scalded skin

Answer 1

Staphylococcus aureus
Lab ID: gram pos stain, catalase & coagulase pos; forms deep yellow hemolytic colonies
Treat: I&D, systemic ABO: vancomycin, Nafcillin, oxacillin

Question 2

What gram (-) rod is transmitted by water or raw seafood adheres to the sm. intestine whose enterotoxin causes rice water stools, and massive fluid and electrolyte loss

Answer 2

Vibrio cholerae

Treat: fluid and electrolytes and doxycycline

Question 3

What gram (-) rod endemic in mammals is transmitted by fleas resulting in characteristic painful buboes?

Answer 3

Yersina pestis
Also bubonic and pneumonic plague
Treat: streptomycin

Question 4

What highly motile spirochete cannot be seen in a gram stain? It is a human parasite transmitted sexually. Characteristic lesions include: primary cancres and secondary condylomas and gummas

Answer 4

Treponema pallidum
Syphilis
Treat: penicillin G alt med if PCN sensitive erythromycin or tetracycline

Question 5

What is the gram (-) coccobacilli organism transmitted by a tick vector responsible for a prominent rash beginning on the palms and soles?

Answer 5

Rickettsia rickettsii
Rocky mtn spotted fever
Treat: doxycycline

Question 6

Which gram(+)cocci that occurs in chains or PAIRS is the most common form of pneumonia, otitis media, and an important cause if meningitis and bacteremia/ sepsis. It commonly occurs following a respiratory infection

Answer 6

Streptococcus pneumonia

Treat: penicillin G if resistant: vancomycin & ceftrixone

Question 7

What is the organism normally found in the flora of the colon that can cause traveler’s diarrhea, UTI, or meningitis
Transmitted person to person or contaminated food/H20

Answer 7

Escherichia coli
Treat c/ ABO and rehydrate
Trimethoprim-sulfamethoxazole or ciprofloxacin

Question 8

Which gram(-) diplococci normally found genital tract causes symptoms of dysuria and discharge. Also is treated prophylactically c/ erythromycin in neonate eyes

Answer 8

Neisseria Gonorrhea
Treat ceftriaxone
Or erythromycin in eyes