Gram Negative Cocci

Key ID info: oxidase positive, catalase positive, glucose positive, maltose negative, non-motile, no capsule

Neisseria gonorrhoeae

clinical significance of N. gonorrhoeae

STI, urethritis (men) and cervicitis (women), infertility and ectopic pregnancy

which gram negative diplococci is superoxol positive

N. gonorrhoeae

which gram negative diplococci is presumptively identified if it is within neutrophils of male urethral discharge

N. gonorrhoeae

key ID info: catalase positive, oxidase positive, glucose and maltose positive, capsule present, non motile

Neisseria meningitidis

clinical significance of N. meningitidis

meningitis and meningococcal septicemia, breakouts often in close living quarters

key ID info: oxidase positive, catalase positive, DNAase positive, ‘hockey puck’ colonies, asaccharolytic, butyrate esterase positive

Moraxella catarrhalis

key ID info: oxidase positive, catalase positive, glucose, maltose, and lactose positive

Neisseria lactamica

Haemophilus species that requires both X factor and V factor for growth

H. influenzae

what species of Haemophilus only shows growth on SBA by satelliting around S. aureus

H. influenzae

clinical significance of H. influenzae

type B is most common cause of meningitis, respiratory tract infections, epiglottitis

species of Haemophilus only requiring V factor to grow

H. parainfluenzae

species of haemophilus that only requires X factor for growth

H. ducreyi

clinical significance of H. ducreyi

STD chancroid (painful genital ulcers) and swollen lymph nodes

what agar is used to grow Haemophilus spp

chocolate agar

which species of Haemophilus shows ‘school of fish’ growth/ parallel arrangement

H. ducreyi

how is the shape of gram negative diplococci often described on a gram stain

coffee or kidney bean shaped

what media are used for gram negative cocci

chocolate agar, Thayer-Martin