1- GRAM-POSITIVE NON-SPORE-FORMING BACILLI CATALASE POSITIVE

Question 1

kleb loeffler’s bacillus/ bull’s neck bacillus
-causative agent of respiratory diphteria, and cutaneous diphteria

Answer 1

cornybacterium diphteriae

Question 2

gram stain result of C. diphteria

Answer 2

singly: palisades or parallel cells
in pairs: V or L shape
groups: picket fence or chinese letter

Question 3

Jk bacillus

Answer 3

C. jeikeium

Question 4

bovine mastits
-indistinguishable form C. diptheria

Answer 4

C. ulcerans

Question 5

causes erythrasma

Answer 5

C. minutissimum

Question 6

zoonosis, suppurative granulomatous lymphadenitis

Answer 6

C. pseudotuberculosis

Question 7

-commonly misidentified as diptheroids, cocci, and diplococci -common cause of meningitis in two groups: neonates and immunosuppressive patients
causes: FEBRILE GASTROENTIRITIS

Answer 7

Listeria monocytogenes

Question 8

cultivation in SIM media, BAP and Gelatin media for L. monocytogenes

Answer 8

SIM: umbrella growth
BAP: narrow zone of bets hemolysis
Gelatin media: Inverted christmas tree

Question 9

motility of L. monocytogenes

Answer 9

end-over-end tumbling motility