T F 2. The phage that infects is called coliphage. Escherichia coli T F 3. Coliphages can be detected as the presence of plaques (clear zones) that develop in the lawn of bacteria. T F 4. TTC stands for triphenyl-tetrazolium-chloride. T F 5. Bacterial gtrth can be indicated by the oxidation of TTC to the red triphenyl-phormazane compound. EXERCISE 86 Select the appropriate letter to indicate whether the statement is true (T) or false (F). T F Members of the genera and are the most important bacteria among Staphylococcus Streptococcus Gram-negative cocci. T F 2. All and species are pathogenic for animals and/or humans. Staphylococcus Streptococcus T F 3. (Enterococcus dies in water quickly and does not reproduce in Streptococcus faecalis faecalis) environment. T F 4. The presence of in water indicates the fresh contamination of water with Streptococcus faecalis animal blood. T F 5. The selectivity of the Szita E-67 medium for is assured by the chlorite and Streptococcus content of the medium. EXERCISE 87 Select the appropriate letter to indicate whether the statement is true (T) or false (F). T F Members of the genus are widespread in soil and water. Pseudomonas T F 2. Pseudomonads are Gram-positve, strictly respiring, mostly obligate aerobic bacteria with polar flagella. T F 3. is a common bacterium in different waters. Pseudomonas aeruginosa T F 4. Brolacin nutrient medium contains sucrose, extract, glutamate and methyl red indicator. T F 5. Colonies of pseudomonads on brolacin agar appear blue in the centre and the surrounding area of the agar is light green. T F 6. The presence of pseudomonads indicates fresh contamination. T F 7. Pseudomonads may attack weak patients and immunocompromised individuals. EXERCISE 88 Select the appropriate letter to indicate whether the statement is true (T) or (F).
T F 2. The phage that infects Escherichia coli is called coliphage. T F 3. Coliphages can be detected as the presence of plaques (clear zones) that develop in the lawn of bacteria. T F 4. TTC stands for triphenyl-tetrazolium-chloride. T F 5. Bacterial gtrth can be indicated by the oxidation of TTC to the red triphenyl-phormazane compound. EXERCISE 86 Select the appropriate letter to indicate whether the statement is true (T) or false (F). T F Members of the genera Staphylococcus and Streptococcus are the most important bacteria among Gram-negative cocci. T F 2. All Staphylococcus and Streptococcus species are pathogenic for animals and/or humans. T F 3. Streptococcus faecalis (Enterococcus faecalis) dies in water quickly and does not reproduce in environment. T F 4. The presence of Streptococcus faecalis in water indicates the fresh contamination of water with animal blood. T F 5. The selectivity of the Szita E-67 medium for Streptococcus is assured by the chlorite and content of the medium. EXERCISE 87 Select the appropriate letter to indicate whether the statement is true (T) or false (F). T F Members of the genus Pseudomonas are widespread in soil and water. T F 2. Pseudomonads are Gram-positve, strictly respiring, mostly obligate aerobic bacteria with polar flagella. T F 3. Pseudomonas aeruginosa is a common bacterium in different waters. T F 4. Brolacin nutrient medium contains sucrose, extract, glutamate and methyl red indicator. T F 5. Colonies of pseudomonads on brolacin agar appear blue in the centre and the surrounding area of the agar is light green. T F 6. The presence of pseudomonads indicates fresh contamination. T F 7. Pseudomonads may attack weak patients and immunocompromised individuals. EXERCISE 88 Select the appropriate letter to indicate whether the statement is true (T) or (F).
2011-0073_practical_microbiology.docx