Bacteriology - Gram Negative Bacteria Flashcards
Ferments Maltose and Glucose
N. meningitidis
Ferments Glucose only
N. gonorrhoeae
MCC of meningitis among 2-18yo
N. meningitidis (recall: BEL for neonates; NHS for infants)
fever, shock, purpura, DIC, thrombocytopenia, ADRENAL INSUFFICIENCY
Waterhouse Frriderichsen Syndrome (most severe form of meningococcemia)
DOC for meningococcemia (N meningitidis)
Pen G
Strains included in capsular polysaccharide vaccine for meningococcemia
A, C, Y, W-135
Chemoprophylaxis for close contacts of meningococcemia
Rifampin
MCC of urethritis
N. gonorrhoeae
MCC of PID
N. gonorrhoeae
Violin string adhesions (perihepatitis)
Fitz-Hugh-Curtis Syndrome
MCC of septic arthritis in sexually active adults
N. gonorrhoeae
DOC for gonorrhea
Ceftriaxone + doxycycline (due to frequent co-infection with chlamydia)
HACEK organisms causinf culture negative subacute bacterial endocarditis
Haemophilus aphrophilus; Actinobacillus actinomycetemcomitans; Cardiobacterium hominis; Eikenella corrodens; Kingella kingae
Satellite phenomenon around s. aureus colonies
haemophilus influenzae
Factors added to chocolate agar for H influenzae cultures
Factors 5(NAD) and 10 (hemin)
Cherry red epiglottis, Thumb sign
Epiglottitis
MCC of epiglotittis
haemophilus influenzae
DOC for haemophilus
ceftriaxone
Cause of laryngotracheobronchitis
parainfluenza 1 and 2
Steeple Sign
laryngotracheobronchitis
Tx for laryngotracheobronchitis
racemic epinephrine
DOC for pertussis
erythromycin
Silver stain, charcoal yeast extract agar (iron and cysteine)
Legionella
Phases of pertussis
Incubation; Catarrhal (Mucuos membrane - highest bacterial load); Paroxysmal (whooping); Convalescent
Cause of Pontiac fever (mild, flulike illness)
Legionella
DOC for legionella
azithromycin or erythromycin
lactose fermenter, characteristic “green sheen” on EMB Agar
escherichia coli
urease positive, ESBL
klebsiella pneumoniae
comma shaped, motile, oxidase positive
Vibrio (other comma - helicobacter, campylobacter and corynebacterium)
Non-lactose fermenters gram negative rods (4)
Salmonella, Shigella, Proteus, Pseudomonas
H2S producer, Nonlactose fermenter
Salmonella (shigella = no H2s)
Swarming motiity
Proteus mirabilis