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Gram Negative Flashcards

1
Q

Most common cause of community acquired UTI

A

E. Coli

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2
Q

Natural host of N. Meningitidis

A

Human

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3
Q

Most common cause of meningitis among aged 2-18 y.o

A

N. Meningitidis

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4
Q

Polysaccharides strains of meningococcal vaccine

A

A, C, Y, W-135

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5
Q

Damages cilia and mucosal cells in the patho of P. aeruginosa infection

A

Procyanin

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6
Q

Oxidase positive on Thayer Martin agar?

Composition of Thayer Martin agar

A

N. Gonorrhoeae

Vancomycin
Colistin
Nystatin

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7
Q

Most common cause of septic arthritis in sexually active adults

A

N. Gonorrhoeae

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8
Q

Treatment for N. Gonorrhoeae infection

A

Ceftriaxone + doxycycline

Ceftriaxone + azithromycin if pregnant

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9
Q

Stain to visualize L. Pneumophila

A

Silver stain

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10
Q

EHEC

A

E. Coli 0157:H7

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11
Q

Most common cause of bacterial epiglottitis

A

H. Influenzae

DOC: Ceftriaxone

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12
Q

Test that detects Salmonella Ab in patients serum

A

Widal test

Cultured in xylose lysine deoxycholate medium

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13
Q

Salmonella type that cause enterocolitis

A

S. Enteritidis

S. Typhimurium

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14
Q

Salmonella type that causes septicemia

A

S. Choleraesius

Common in patients with sickle cell anemia

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15
Q

Most common cause of urethritis and PID

A

N. Gonorrhoeae

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16
Q

Causes most severe form of bacillary dysentery

A

Shigella dysenteriae/ type 1 Shiga bacillus

Most common cause of epidemic dysentery

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17
Q

Most common cause of bacterial gastroenteritis

A

Campylobacter jejuni

Invades mucosa of colon but doesn’t penetrate

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18
Q

Most sever form of meningococcemia caused by N. Meninigitidis

A

Waterhouse-Friderichsen syndrome

bilateral hemorrhagic destruction of the adrenal glands

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19
Q

Most important virulence factor of M. Tuberculosis

Action?

A

Cord factor

Prevents leukocyte migration

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20
Q

DOC for uncomplicated gonorrhoeae

A

Cefixime

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20
Q

Salmonella type that cause typhoid fever

A

S. Typhi

DOC: ampicillin

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21
Q

Most commone cause of pneumonia in alcoholics

A

Klebsiella pneumoniae

Necrotizing pneumonia

22
Q

Treatment for this facultative gram negative rod.
No lactose fermentingg
Urease positive
Swarming motility

A

TMP-SMX
Ampicillin

P. Mirabilis

23
Q

Gram negative diplococci that ferments maltose and glucose

A

N. Meningitidis

24
Q

Most common cause of bacillary dysentery

A

Shigella sonnei/ Duval’s bacillus

25
Q

Chemical responsible for grape like odor of P. Aeruginosa

A

Acetoaminophenone

26
Q

Antibiotics associated with H. Pylori eradication

A

Metronidazole
Tetracycline
Clarithromycin
Amoxicillin

28
Q

Most common cause of otitis externa

A

P. Aeruginosa

29
Q

Treatment for most virulent bacteria

A

Streptomycin and Tertracycline

MO: Yersinia Pestis

31
Q

3rd most common cause of nosocomial UTI

A

P. Aeruginosa

32
Q

Radiologically detectable calcification in primary complex in M. Tuberculosis infection

A

Rankes complex

33
Q

Treatment for tuberculoid leprosy

A

Dapsone and rifampicin

34
Q

Treatement for lepromatous leprosy

A

Dapson, rifampicin and clofazime

35
Q

Give descriptive properties of M. Pneumoniae

A

Smallest free living MO
Not seen in GS
Only bacteria with cholesterol in cell membrane
Eatons medium

36
Q

Most common type of atypical pneumonia

A

M. Pneumoniae

DOC: erythromycin or azithromycin

37
Q

MO that cannot be culture in vitro

A

M. Leprae

T. Pallidum

38
Q

Hutchinson triad

A

Hutchinson teeth
Deafness
Keratitis

39
Q

Most impt dx test for primary syphilis

A

Dark field microscopy

40
Q

Confirmatory teat for secondary syphilis

A

Fluorescent Treponemal Antobody-Absorption (FTA-ABS)

41
Q

Largest medically important bacteria

A

Borrelia Burgdorferi

42
Q

Stages of Lyme disease

A

Stage1: erythrma chronicum migrans
Stage2: myocarditis, meningitis, bells palsy
Stage3: autoimmune migratory polyarthritis (onion skin lesion), actodermatitis chronica atrophicans

43
Q

DOC for Lyme disease

A

Doxycycline

44
Q

Leptospira interrogans grown in

A

Ellinghausarn-McCullough-Johnson-Harris medium or Fletchers medium

45
Q

Gold standar for L. interrogans detection

A

Leptospire microscopic agglutination test

46
Q

Predominant anaerobe of human colon

A

B. Fragilis

DOC: metronidazole

47
Q

Treatment for Brucella Abortus infection

A

Doxycycline plus Rifampicin

48
Q

Most severe form of leptospirosis

A

Weils syndrome

Triad of jaundice, bleeding and uremia

49
Q

Most common cause of STD overall

A

Chlamydia trachomatis

50
Q

Trachoma

A

Caused by C. trachomatis type A-C

Halberstadter Prowazek inclusions

51
Q

C. Trachomatis type that cause genital tract infection

52
Q

Major membrane sterol of fungi

A

Ergosterol

53
Q

Spaghetti and meatball appearance on 10% KOH

A

Malassezia furfur causing Tinea Versicolor

Miconazole

54
Q

Transmission of Coccidioides Immitis

A

Inhalation of arthrospores

Microbiology (5 decks)

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