Textbook Question
Why might an alcoholic be susceptible to pulmonary disease?
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Ch. 20 - Pathogenic Gram-Negative Cocci and Bacilli
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302
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Table of contents
- Ch. 1 - A Brief History of Microbiology31
- Ch. 2 - The Chemistry of Microbiology28
- Ch. 3 - Cell Structure and Function39
- Ch. 4 - Microscopy, Staining, and Classification25
- Ch. 5 - Microbial Metabolism51
- Ch. 6 - Microbial Nutrition and Growth37
- Ch. 7 - Microbial Genetics51
- Ch. 8 - Recombinant DNA Technology21
- Ch. 9 - Controlling Microbial Growth in the Environment36
- Ch. 10 - Controlling Microbial Growth in the Body: Antimicrobial Drugs21
- Ch. 11 - Characterizing and Classifying Prokaryotes29
- Ch. 12 - Characterizing and Classifying Eukaryotes34
- Ch. 13 - Characterizing and Classifying Viruses, Viroids, and Prions23
- Ch. 14 - Infection, Infectious Diseases, and Epidemiology35
- Ch. 15 - Innate Immunity34
- Ch. 16 - Adaptive Immunity21
- Ch. 17 - Immunization and Immune Testing29
- Ch. 18 - Immune Disorders22
- Ch. 19 - Pathogenic Gram-Positive Bacteria25
- Ch. 20 - Pathogenic Gram-Negative Cocci and Bacilli28
- Ch. 21 - Rickettsias, Chlamydias, Spirochetes, and Vibrios25
- Ch. 22 - Pathogenic Fungi47
- Ch. 23 - Parasitic Protozoa, Helminths, and Arthropod Vectors44
- Ch. 24 - Pathogenic DNA Viruses23
- Ch. 25 - Pathogenic RNA Viruses30
- Ch. 26 - Applied and Industrial Microbiology29
- Ch. 27 - Microbial Ecology and Microbiomes22
Bauman6th EditionMicrobiology with Diseases by TaxonomyISBN: 9780134832302Not the one you use?Change textbook
Chapter 20, Problem 5
A coliform bacterium that likely contaminates dairy products is ___________.
a. Bartonella
b. Serratia
c. Enterobacter
d. Proteus
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Understand that coliform bacteria are a group of Gram-negative, rod-shaped bacteria that ferment lactose with gas and acid production within 48 hours at 35-37°C. They are commonly used as indicators of sanitary quality of foods and water.
Recall that coliforms belong mainly to the family Enterobacteriaceae, which includes genera such as Escherichia, Enterobacter, Klebsiella, and Citrobacter.
Review the options given: Bartonella, Serratia, Enterobacter, and Proteus. Identify which of these are members of the Enterobacteriaceae family and are known coliforms.
Note that Enterobacter is a well-known coliform bacterium often associated with contamination in dairy products due to its ability to ferment lactose and survive in such environments.
Conclude that among the options, Enterobacter is the most likely coliform bacterium contaminating dairy products based on its classification and characteristics.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Coliform Bacteria
Coliform bacteria are a group of Gram-negative, rod-shaped bacteria commonly found in the environment, including soil and water, and are used as indicators of sanitary quality. They ferment lactose with gas production within 48 hours at 35-37°C, which helps identify potential contamination in food and water.
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Introduction to Bacteria
Common Coliform Genera in Dairy Contamination
Certain coliform genera such as Enterobacter and Escherichia are frequently associated with contamination of dairy products due to their presence in fecal matter and the environment. Identifying these bacteria helps assess the hygiene and safety of dairy processing.
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Differentiation of Bacterial Genera
Bacterial genera like Bartonella, Serratia, Enterobacter, and Proteus differ in their characteristics and typical habitats. Understanding their traits, such as lactose fermentation and typical sources, is essential to identify which are coliforms and likely contaminants in dairy products.
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Related Practice
Textbook Question
Name six factors that facilitate the production of disease by Bordetella pertussis.
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Textbook Question
Statistics show that meningococcal diseases are more frequent in college dormitories and military barracks than in the population at large. Suggest an explanation of this observation.
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Textbook Question
Which of the following bacteria might be responsible for the formation of petechiae in a host?
a. Neisseria meningitidis
b. Escherichia coli O157:H7
c. Klebsiella
d. Proteus mirabilis
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Textbook Question
Which of the following statements is true?
a. PID is a severe type of diarrhea in which infection spreads from the intestines to
the bloodstream.
b. PID can result from Neisseria infection.
c. PID is more common in men than women.
d. Members of the family Enterobacteriaceae usually cause PID.
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Textbook Question
Capsules of pathogenic enteric bacteria are virulence factors because they __________.
a. Capture iron from hemoglobin and store it in the bacteria
b. Release hemolysins that destroy red blood cells
c. Produce fimbriae that enable the bacteria to attach to human cells
d. Protect the bacteria from phagocytosis and from some antibodies
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