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25. Eosin methylene blue agar (EMB) normally permits the growth of bacteria that contain A) high concentration of lipopolysaccharide and high murein concentration - Vibrio sp. B) high concentration on murein and low concentration of lipopolysaccharides - Micrococcus sp. C) low murein and low lipopolysaccharides - Nesseria sp. D) low murein and high lipopolysaccharides - Salmonella sp. E) none of the above = identify 26. With urea agar, an increase in pH due to release of ammonia causes the indicator to turn pink to red is most characteristic of A) Escherichia coli B) Providencia sp. C) Salmonella sp. D) Proteus sp. E) none of the above = identify 27. Members of Yersinia, Kelbsiella, Shigella, Staphylococcus characteristically produce growth only along the line of inoculation in SIM or MIO agar. This suggests that these organism A) ferment lactose B) contain the enzymes to form hydrogen sulfide C) lack flagella D) contain 90% peptidoglycan E) none of the above = identify 28. Lancefields's group classification of a beta hemolytic Streptococcus sp. whose growth is inhibited in the presence of bacitracin is A) Streptococcus pneumonia B) Streptococcus viridans group C) Group B - Streptococcus agalactiae D) Group D - Streptococcus (Enterococcus fecalis) E) none of the above = identify 29. In observation of a smear using the microscope, higher magnification requires while resolution is achieved through light through the use of the the use of the A) less adjustment of condenser - fine B) more - condenser - coarse adjustment C) more - diaphragm - fine adjustment D) less - diaphragm - condenser E) none of the above = identify 30. Neisseria species and Pseudomonas species both oxidize certain aromatic amines such as tetra-methyl-p-phenylenediamine dihydrochloride, to a dark pink to purple end products. However the following is most characteristic of Nesseria A) a bacilli that retains the crystal violet complex after decolorization B) a cocci that stains with the counter stain safranin C) cocci that retains the crystal violet complex after decolorization D) bacilli that stains with safranin E) none of the above = identify 31. A family goes on a summer picnic. After playing ball for some time, they have lunch (ham salad, tomato salad, lemonade and apple pie) A few hours later they all become nauseated and begin to vomit. There is not fever. The next day they feel better. What type of food poisoning would you suspect? A) Salmonella B) Cholera C) Staphylococcal D) Botulism E) Parasitic