Microbiology: An Introduction (13th Edition)
13th Edition
ISBN: 9780134605180
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case, Derek Weber, Warner Bair
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 25, Problem 4R
Summary Introduction
To review:
The reason why E. coli is both beneficial and harmful.
Introduction:
Microorganisms that have the ability to cause infectious diseases are called as pathogens. Illness in an individual is caused either by disturbing the normal metabolic activity of the host or by inducing the host’s immune system to produce a response. Approximately 1014 microbes are known to inhabit in the gut of a healthy human being. These normal gut microflora play an essential role in the
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
E.coli is part of the normal microbiota of the intestines and can cause gastroenteritis. Explain why this one bacterial species is both beneficial and harmful.
What part of the Escherichia coli cell contains endotoxin?
Why does Helicobacter pylori cause ulceractions in the lining of the Stomach?
1)The microbes secrete a toxin that prevents the host from detecting invasion of the microbe and thus allows it to thrive in the stomach and damage the host cells.
2)After invasion of the microbe in the cells lining the stomach, they are no longer able to produce mucous to protect the host cells from acid erosion
3)The microbe produces an enzyme that causes the cell to produce potent digestive enzymes that erode the stomach lining.
4)Once the microbe has entered the stomach, it releases digestive enzymes that degrade the mucous secreting cells.
Chapter 25 Solutions
Microbiology: An Introduction (13th Edition)
Ch. 25 - Complete the following table:Ch. 25 - Complete the following table:Ch. 25 - DRAW IT Identify the site colonized by the...Ch. 25 - Prob. 4RCh. 25 - Prob. 5RCh. 25 - Explain how the following diseases differ and how...Ch. 25 - Prob. 7RCh. 25 - Complete the following table:Ch. 25 - Look at life cycle diagrams for human tapeworm and...Ch. 25 - Prob. 10R
Ch. 25 - Prob. 1MCQCh. 25 - Prob. 2MCQCh. 25 - Prob. 3MCQCh. 25 - Gastric ulcers are caused by a. stomach acid. b....Ch. 25 - Microscopic examination of a patients fecal...Ch. 25 - Prob. 6MCQCh. 25 - Identification is based on the observation of...Ch. 25 - Prob. 8MCQCh. 25 - Prob. 9MCQCh. 25 - This microbe is frequently transmitted to humans...Ch. 25 - Why is a human infection of trichinella considered...Ch. 25 - Complete the following table:Ch. 25 - Match the foods in column A with the microorganism...Ch. 25 - Which diseases of the gastrointestinal tract can...Ch. 25 - Prob. 1CAECh. 25 - Prob. 2CAECh. 25 - Prob. 3CAECh. 25 - Three to 5 days after eating Thanksgiving dinner...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which of the following bacterial species is considered normal flora of the mouth? O 1) Streptococcus mutans 2) Escherichia coli 3) Klebsiella pneumoniae 4) Staphylococcus epidermidisarrow_forwardWhat is Escherichia coli infection?arrow_forwardThe large intestine contains bacteria, such as E.coli, that synthesize vitamin K and some B vitamins and absorbed into the bloodstream. Answer the following questions: 1. Describe the type of symbiosis best represented by E.coli and human large intestine. 2. When can E.coli become potentially pathogenic (disease-causing)? Explain briefly.arrow_forward
- If there is a causal relationship between the presence of H. pylori and ulcers, how might you explain that 50% of the patients with a normal endoscopic examination were infected with the bacteria?arrow_forwardPropionibacterium acnes is a normal member of the skin microbiome that benefits the body by lowering the skin's pH- an antimicrobial effect. However, P. acnes is also the leading cause of acne. Explain mechanistically how a bacterium can be part of the normal microbiome and beneficial but also be pathogenic.arrow_forwardAll of the following pertain to listeriosis, except 1) intrauterine infection usually results in fetal death. 2) enterotoxin of the organism causes symptoms. 3) it causes a serious septicemia and meningitis in the elderly, immunocompromised, and infants. U 4) it causes symptoms of fever, diarrhea, and sore throat. 5) adequate pasteurization and thorough cooking of food can improve prevention.arrow_forward
- Three to five days after eating Thanksgiving dinner at a restaurant, 112 people developed fever and gastroenteritis. The dinner consisted of Roast Turkey, turkey giblet soup, mashed potatoes and crushed giblet gravy. The gravy was not refrigerated and was served the entire Thanksgiving day. The analysis of leftover food showed the same bacteria as was isolated from patients. a) What was the source of illness? b) What was the most likely microbe causing this illness? c) Was this an infection or an intoxication?arrow_forwardPropionibacterium acnes is a normal member of the skin microbiome that benefits the body by lowering the skin's pH- an antimicrobial effect. However, P. acnes is also the leading cause of acne. Explain mechanistically how can a bacterium be normal and beneficial but also be pathogenic?arrow_forwardThe general public takes for granted the link between an infectious agent and a given infection Discuss the requirements established by Koch, the nineteenth-century German scientist, before ascertaining, for instance, that Helicobacter pylori bacterium is the cause of the gastric ulcer. Why is it so essential to meet these conditions?arrow_forward
- What is the Gastrointestinal tract infection that cauesd by bacteria? Explain with pictures or drawing or attcach any vedio related to that, please.arrow_forwardCompare and contrast the virulence factors and signs and symptoms of infections with the four main E. coli groups.arrow_forwardWhile it is true that not all coliforms are pathogenic under normal conditions, please name two situations that can occur due to infection by coliforms under abnormal conditions (when they are present where they are not supposed to be or when their numbers exceed acceptable levels)arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Medical Terminology for Health Professions, Spira...Health & NutritionISBN:9781305634350Author:Ann Ehrlich, Carol L. Schroeder, Laura Ehrlich, Katrina A. SchroederPublisher:Cengage Learning
Medical Terminology for Health Professions, Spira...
Health & Nutrition
ISBN:9781305634350
Author:Ann Ehrlich, Carol L. Schroeder, Laura Ehrlich, Katrina A. Schroeder
Publisher:Cengage Learning