Foundations in Microbiology
9th Edition
ISBN: 9780073522609
Author: Kathleen Park Talaro, Barry Chess Instructor
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 18.L2, Problem 1CT
You have been handed the problem of diagnosing gonorrhea from a single test. Which one will you choose and why?
Expert Solution & Answer
Summary Introduction
To analyze:
Which diagnostic test is to be used, if gonorrhea must be diagnosed using one test only.
Introduction:
Gonorrhea is caused by a Gram negative bacterium - Neisseria gonorrhoeae. There is a need to differentiate it from other Gram negative bacteria during diagnosis.
Explanation of Solution
N. gonorrhoeae can be identified by a series of differentiating tests, beginning with the Gram stain, followed by analysis of oxidase production, sugar fermentation, growth patterns, nitrogen reduction and pigment production. However, more rapid methods are preferred for early diagnosis.
One property of this pathogen that allows a reasonably accurate diagnosis is that it tends to get engulfed by phagocytes, and remain viable in them. So collecting neutrophils from the urethra, vaginal, or exudates from the eyes of any of aforementioned parts, and performing a Gram stain to identify Gram-negative diplococci is a single test that can diagnose gonorrhea.
To identify N. gonorrhoeae with high precision in a single test, PCR analysis is used on urine samples.
Conclusion
A Gram stain on neutrophils from the urethra, vaginal, or exudates from the eyes of any of aforementioned part, to identify Gram-negative diplococci, can diagnose gonorrhea with reasonable accuracy.
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Chapter 18 Solutions
Foundations in Microbiology
Ch. 18.1 - Prob. 1ELOCh. 18.1 - Describe the ability of S. aureus to withstand...Ch. 18.1 - Prob. 3ELOCh. 18.1 - Summarize the cutaneous, systemic, and toxigenic...Ch. 18.1 - Prob. 5ELOCh. 18.1 - Explain strategies used to prevent and treat...Ch. 18.1 - Prob. 1CYPCh. 18.1 - Discuss why food intoxication in salty foods, such...Ch. 18.1 - Explain how unbroken skin, the phagocytic action...Ch. 18.1 - List the strategies commonly used to prevent and...
Ch. 18.1 - Explain the meanings of the acronyms MRSA, VRE,...Ch. 18.2 - Name the most important human pathogens in the...Ch. 18.2 - Summarize the virulence factors of S. pyogenes, as...Ch. 18.2 - Prob. 9ELOCh. 18.2 - Explain strategies used to prevent and treat...Ch. 18.2 - Relate the pathogenesis and epidemiology of S....Ch. 18.2 - List the clinically significant pathogens in the...Ch. 18.2 - Describe the immediate effects and long-term...Ch. 18.2 - Prob. 8CYPCh. 18.2 - Differentiate between pneumococcal disease...Ch. 18.3 - Name the most important human pathogens in the...Ch. 18.3 - Compare the differences in pathologies of N....Ch. 18.3 - Summarize the pathogenesis and epidemiology of N....Ch. 18.3 - Recall the medically important genera, besides...Ch. 18.3 - Describe the epidemiology and pathology of N....Ch. 18.3 - List the short-term and long-term consequences of...Ch. 18.3 - Prob. 12CYPCh. 18.L1 - Which of the following is/are a pyogenic...Ch. 18.L1 - The coagulase text is used primarily to...Ch. 18.L1 - Prob. 3MCQCh. 18.L1 - The most severe streptococcal diseases are caused...Ch. 18.L1 - 5. Rheumatic fever damages the _______, and...Ch. 18.L1 - ______ hemolysis is the partial lysis of red blood...Ch. 18.L1 - Prob. 7MCQCh. 18.L1 - Which of the following strains of pathogens has...Ch. 18.L1 - Otitis media is a/an _______ infection often...Ch. 18.L1 - Prob. 10MCQCh. 18.L1 - Prob. 11MCQCh. 18.L1 - Prob. 12MCQCh. 18.L1 - Prob. 13MCQCh. 18.L1 - Which infectious agent of those covered in the...Ch. 18.L1 - Prob. 15MCQCh. 18.L1 - Prob. 16MCQCh. 18.L1 - The first step in the clinical diagnosis of...Ch. 18.L1 - Vaccination can provide protection against N....Ch. 18.L1 - In this case, the first step taken to treat...Ch. 18.L1 - Prob. 1WCCh. 18.L1 - What conditions favor staph food poisoning?Ch. 18.L1 - Prob. 3WCCh. 18.L1 - Prob. 4WCCh. 18.L1 - Discuss the apparent pathology at work in...Ch. 18.L1 - Prob. 6WCCh. 18.L1 - a. Compare and contrast the characteristics of...Ch. 18.L2 - You have been handed the problem of diagnosing...Ch. 18.L2 - You have been called upon to prevent outbreaks of...Ch. 18.L2 - Prob. 3CTCh. 18.L2 - Prob. 4CTCh. 18.L2 - Prob. 5CTCh. 18.L2 - Prob. 6CTCh. 18.L2 - Prob. 1VCCh. 18.L2 - Prob. 2VC
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