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Textbook Question
Chapter 21, Problem 1TMW

Bacteria infecting the mouth can enter the blood through small cuts resulting from normal brushing and flossing. Why would these bacteria reach the right atrioventricular valve before the other heart valves?

Expert Solution & Answer
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Summary Introduction

To tell:

The reason for the bacteria which reaches first to the right atrioventricular valve before any other heart valves.

Introduction:

The blood is normally microbes free; that is, it does not contain any microbes like bacteria, virus, fungi, and parasites. However, small brushing and abrasions provide an entrance for the microbes like bacteria to enter the bloodstream. The presence of bacteria in the bloodstream is known as “bacteremia”. The example of some bacteria that may enter the bloodstream is Klebsiella pneumonia, Staphylococcus aureus, Clostridium tetani, and so on.

Explanation of Solution

Bacteria from the mouth enter into to the blood. The blood carries these bacteria to the superior vena cava through which blood enters into the heart. The vena cava then delivered the blood to the right atrium and then into the right ventricle. Before entering the right ventricle it must pass a valve. The valve that is present between the right atrium and right ventricle is called the right atrioventricular valve, so it will be the first valve in which the bacteria will reach before any other heart valve.

Conclusion

The atrioventricular is known to be the first valve for the bacteria to enter when compared with another valve.

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Chapter 21 Solutions

Microbiology With Diseases By Body System, Books A La Carte Plus Masteringmicrobiology With Etext -- Access Card Package (4th Edition)

Ch. 21 - Prob. 1MCCh. 21 - Prob. 2MCCh. 21 - Prob. 3MCCh. 21 - Prob. 4MCCh. 21 - Prob. 5MCCh. 21 - Prob. 6MCCh. 21 - Prob. 7MCCh. 21 - How is septicemia introduced into the body? a....Ch. 21 - Prob. 9MCCh. 21 - Prob. 10MCCh. 21 - A cardiologist examines a patient with history of...Ch. 21 - Prob. 12MCCh. 21 - Prob. 13MCCh. 21 - Which is spread from person to person? a....Ch. 21 - Which of the following statements is false? a. A...Ch. 21 - Prob. 16MCCh. 21 - Prob. 17MCCh. 21 - Prob. 18MCCh. 21 - Prob. 19MCCh. 21 - Prob. 20MCCh. 21 - Prob. 21MCCh. 21 - Prob. 22MCCh. 21 - Prob. 23MCCh. 21 - Prob. 24MCCh. 21 - Prob. 25MCCh. 21 - Prob. 1MCh. 21 - Prob. 2MCh. 21 - Prob. 1FIBCh. 21 - Prob. 2FIBCh. 21 - Prob. 3FIBCh. 21 - Prob. 4FIBCh. 21 - Prob. 5FIBCh. 21 - The three parts of the life cycle of Plasmodium...Ch. 21 - Prob. 7FIBCh. 21 - Prob. 8FIBCh. 21 - Prob. 9FIBCh. 21 - Prob. 10FIBCh. 21 - On the figure of the life cycle of Plasmodium,...Ch. 21 - Prob. 2VICh. 21 - List the three layers of the heart in order from...Ch. 21 - Prob. 2SACh. 21 - Prob. 3SACh. 21 - Prob. 4SACh. 21 - Define occult septicemia.Ch. 21 - Prob. 6SACh. 21 - Prob. 7SACh. 21 - Prob. 8SACh. 21 - Prob. 9SACh. 21 - If 13 million people die annually from malaria,...Ch. 21 - Prob. 11SACh. 21 - Prob. 12SACh. 21 - Prob. 13SACh. 21 - Why do geneticists say there is a single species...Ch. 21 - Explain why poor hygiene actually protects against...Ch. 21 - A blood bank refused to accept blood from a...Ch. 21 - An epidemiologist notices a statistical difference...Ch. 21 - Prob. 3CTCh. 21 - Compare and contrast the life cycles of...Ch. 21 - Explain how each of the following could lead to...Ch. 21 - Discuss why sickle-cell trait is advantageous to...Ch. 21 - Prob. 7CTCh. 21 - Prob. 8CTCh. 21 - Prob. 9CTCh. 21 - Most cases of tularemia in the United States occur...Ch. 21 - Prob. 11CTCh. 21 - Suppose scientists developed a vaccine for dengue...Ch. 21 - Prob. 13CTCh. 21 - Prob. 14CTCh. 21 - Prob. 1CM
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