Microbiology 88-172 pt 2

138) An organism gave the following reactions:

This organism MOST likely is:

139) Which of the following organisms can grow in the small bowel and cause diarrhea in children, traveler's diarrhea, or a severe cholera-like syndrome through the production of enterotoxins?

Shigella species characteristically are:

142) A gram-negative bacillus has been isolated from feces, and the confirmed biochemical reactions fit those of Shigella. The organism does not agglutinate in Shigella antisera. What should be done next?

143) Biochemical reactions of an organism are consistent with Shigella. A suspension is tested in antiserum without resulting agglutination. However, after 15 minutes of boiling, agglutination occurs in group d antisera. The Shigella species is:

144) >100,000 CFU/mL of a gram-negative bacilli were isolated on MacConkey from a urine specimen. Biochemical results are as follows:

The organism is MOST likely:

150) A 25-year old man who had recently worked as a steward on a transoceanic grain ship presented to the emergency room with high, diarrhea and prostration. Axillary lymph nodes were hemorrhagic and enlarged. A Wayson stain of the aspirate showed bacilli that were bipolar, resembling safety pins. The MOST likely identifications of this organism is:

153) Plesiomonas shigelloides is a relatively new member of the family Enterobacteriaceae. What characteristic seperates it from other members of the Enterobacteriaceae?

155) The stock cultures needed for quality control testing of motility are:

156) The stock cultures needed for quality control testing of oxidase production are:

157)The stock cultures needed for the quality control testing of deamination activity are:

158) The stock cultures needed for quality control testing of deoxyribonuclease (DNase) production are:

159) Quality control of the spot indole test requires the use of ATCC cultures of:

160) An organism that exhibits the satellite phenomenon around colonies of staphylococci is:

161) An organism isolated from the surface of a skin burn is found to producea diffusible green pigment on a blood agar plate. Further studies of the orgainism would MOST likely show the organism to be:

162) A nonfermenting gram-negative bacillus is isolated from a wound. The nitrate and oxidase are strongly positive. The growth on sheep blood agar has a grape like odor. The organism is:

163) A small, gram- negative bacillus is isolated from from an eye culture. It grows only on chocolate agar and is oxidase-negative. The MOST likely organism is

165) The optimal incubator temperature for isolation of the Campylobacter jejuni/ coli group is:

167) A gastroenterologists submits a gastric biopsy from a patient with a peptic ulcer. To obtain presumptive evidence of Helicobacter pylori, a portion of the specimen should be added to which media?

168) A 4-year--old boy is admitted to the hospital with suspected meningitis. He has not had MOST of the childhood vaccines. The suspected pathogen is:

171) A gram stain of a touch prep from a gastric biopsy shows gram-negative bacilli that are slender and curved. The MOST likely pathogen is:

172) A cerebrospinal fluid has been inoculated onto sheep blood and chocolate agar plates and into a tube trypticase soy broth. All media were incubated in an atmosphere of 5% CO2. Which of the following organism would usually by this procedure?