MICRO SYSTEM

Question 1

How is the reservoir for Shigella different from that of EHEC?

Answer 1

EHEC = animal i.e. undercooked meat (hamburger); Shigella = resevoir is humans

Question 2

Normal flora of vagina

Answer 2

Lactobacillus (also colonized by E. coli and group B strep)

Question 2

3 bugs that can mimic appendictis

Answer 2

Yersenia enterocolitica, nontyphoidal salmonella, and campylobacter

Question 2

What is the most common cause of pneumonia in a neonate (i.e. 0-4 weeks), what about after 4 weeks?

Answer 2

Group B strep (moms vagina), RSV

Question 3

Baby born with vesicular lesions and encephalitis

Answer 3

congenital HSV (from vagina, not transplacental)

Question 5

Bulging can

Answer 5

C. botulinum

Question 6

Which congenital infection is most likely to be received during delivery rather than transplacentally?

Answer 6

HSV-2

Question 7

Poisoning from reheated meat dishes

Answer 7

C. perfringens

Question 8

What do you give bacterial meningitis empirically? What if you suspect listeria?

Answer 8

Ceftriaxone and vancomycin, add ampicillin

Question 8

What does a positive leukocyte esterase test tell you? Positive nitrite test?

Answer 8

bacterial UTI; gram negative bacterial UTI

Question 10

Which watery diarrhea causing bug has ST and LT toxins?

Answer 10

ETEC (can Tx with bismuth and sucralfate)

Question 10

Hearing loss, seizures, and petechial rash in infant

Answer 10

Most likely congenital CMV

Question 11

Chorioretinitis, hydrocephalus, and intracranial calcifications in a neonate

Answer 11

Congenital toxoplasmosis

Question 13

Bacteria isolated from UTI that produces a red pigment

Answer 13

Serattia marscescans

Question 14

Which childhood exanthem involves post auricular lymphadenopathy?

Answer 14

Rubella

Question 15

What is the most common demographic for osteomyelitis

Answer 15

children

Question 16

Ceftriaxone and vancomycin are given empirically for this condition _____________. And ampicillin is added if _______________ is suspected.

Answer 16

Bacterial meningitis, Listeria monocytogenes

Question 17

How is deafness from congenital syphilis different from deafness in other torch infections?

Answer 17

It specifically causes CN VIII deafness, not ossicle malformation

Question 19

Osteomyelitis in cat scratch pt

Answer 19

Pasteurella multocida

Question 20

2 infections that can cause stillbirth due to hydrops fetalis

Answer 20

ParvoB19, Syphilis

Question 21

PDA, cataracts, and deafness with a rash in a neonate

Answer 21

Congenital rubella (mom had arthritis with lymphadenopathy)

Question 22

Which protozoa (2) cause bloody diarrhea? Watery (3)?

Answer 22

Bloody = Entamoeba histolytica, Balantidium coli (ciliated, pigs); Watery = Giardia (esp. IgA def) and if IC = Cryptosporidium and Cystiosopora

Question 23

Which comma shaped organisms cause watery diarrhea? Bloody diarrhea?

Answer 23

Watery = V. cholerae; Bloody = C. jejuni

Question 24

What 2 orthopedic conditions can N. gonorrhea cause?

Answer 24

Septic arthritis most likely, can be osteomyelitis