Infectious Disease Flashcards by Jen Lim

Organism most closely linked with GBS

Campylobacter jejuni

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GI illness from water park with oocysts in stool

Cryptosporidium (tx with nitazoxanide)

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History of influenza increases chance of PNA caused by

Staph Aureus

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Recent chicken pox increases chance of toxic shock sepsis 2/2

Strep pyogenes

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Most common cause of catheter related bacteremia

Staph epidermidis

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Most common bacterial cause of OM, meningitis, PNA, bacteremia

Strep pneumoniae

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Group A Strep (strep pyogenes) causes (6 things):

Pharyngitis
Impetigo
Strep TSS
Rheumatic fever
Acute GN
Scarlet fever

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Treatment of strep throat

Pen V x 10 days OR
Amoxicillin OR
Erythromycin x 10 days for PCN-allergic

Or IM pen G x 1

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Sandpaper rash

Scarlet fever (strep pharyngitis plus rash). Treat like pharyngitis.

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Major cause of newborn PNA, bacteremia, and meningitis

Group B strep (strep agalactiae)

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Strep pyogenes

Group A Strep

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Strep agalactiae

Group B strep

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Gram positive rods

Listeria
Corynebacterium 
Arcanobacterium
Bacillus
Clostridium

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Gray white pharyngeal membrane, URI, low grade fever, hoarseness

Diphtheria

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Sheep handler with painless papule, progresses to painless ulcer and eschar.

Bacillus anthracis

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Presents with scarlet fever like rash and sore throat

Arcanobacterium

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CXR with PNA and Widened mediastinum

Bacillus anthracis

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Fried rice left at room temperature

Bacillus cereus

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Chitterlings

Yersinia

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Diarrhea with seizures

Shigella

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Penetrating injury to eye

Bacillus cereus

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Constipated and hypotonic child

Clostridium botulism

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Gram negative cocci

Neisseria (meningococcus, gonorrhea)

Mortadella

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Meningitis prophylaxis for pregnant women

Ceftriaxone

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Tx for neisseria meningitidis

PCN G or ceftriaxone

Concern for complement deficiency in N. Meningitidis

Order CH50

Eye ointment at birth is useful for preventing

Gonococcal ophthalmia (does not prevent chlamydia)

Nail puncture wounds through a tennis shoe

Pseudomonas

IV drug user with endocarditis/osteomyelitis

Pseudomonas

Hot tub rash

Pseudomonas

Diabetics with chronic otitis externa

Pseudomonas

Round indurated black lesion with central ulceration (etchyma gabgrenosum)

Pseudomonas

Burkholderia cheap is and burkholderia pseudomallei

Iguana

Salmonella non typhi

Diarrhea and rectal prolapse

Shigella

Apple juice

E.coli

Sorbitol enhanced agar needed to grow

E. Coli O157:H7

Confusion, diarrhea, PNA

Legionella. Tx with azithromycin

Citrobacter in neonate should prompt eval for:

Brain abscess

Gram negative coccobacilli

Haemophilus influenzae Yersinia Francisella

Most common sequelae of bacterial meningitis

Hearing loss

What transmits yersinia pestis (plague)

Fleas

Hemorrhagic PNA

Plague PNA (is contagious unlike anthrax PNA)

Pseudoappendicitis

Yersinia enterocolitica or yersinia pseudotuberculosis

Rabbit (tick, deer)

Francisella tularensis. Don't aspirate because contagious. Tx with gentamicin

Arkansas + lymph node

Tularemia

Arkansas, Missouri, Chicago, beaver dams and PNA in hunter with skin lesion

Blastomycosis

Petechial rash on palms and soles, hyponatremia, fever, muscle aches

RMSF (R. Rickettsia). Tx with doxy

Tick bite that drops all three cell lines

Ehrlichia and Anaplasma

Adolescent with PID and IUD

Actinomyces

Sulfur granules

Actinomyces

Staccato cough

Chlamydia PNA. Tx with oral erythromycin. Watch for pyloric stenosis

PNA + splenomegaly + exposure to birds

Chlamydia psittaci

Hawaii or swimming with your dog

Leptospirosis

Berry pickets, farmer, gardeners

Sporotrichosis. Tx with Po itraconazole

Citywide outbreak of watery diarrhea

Cryptosporidium

Strawberries/raspberries

Cyclospora

Plasmodium falciparum is resistant to:

Chloroquine

Duffy RBC antigen is site of attachment

Plasmodium vivax

Maltese cross in red cell

Babesia

Sulfuric belching

Giardia

German measles

Rubella

Rubeola

Measles

Congenital disease that increases risk of IDDM

Congenital rubella

Cough, coryza, conjunctivitis, rash starts at hairline and spreads south

Measles

Once they have the rash, they are no longer infectious

Parvovirus B19, erythema infectiosum, fifths disease

5-10% of pregnant woman with this will have fetal loss from hydrops fetalis

Parvovirus B19

Rash comes out in sunlight or bathtub

Parvovirus B19

Affects red cell precursors, concern for sickle cell anemia or leukemia

Parvovirus B19

How to diagnose bacterial endocarditis

Blood CX

Pastias lines

Scarlett fever

Fever, cough, coryza, conjunctivitis

Measles

Causes TSS

Staph aureus

Serious complication of S Pyogenes TSS

Necrotizing fasciitis