Laboratory Experiments in Microbiology (11th Edition)
11th Edition
ISBN: 9780321994936
Author: Ted R. Johnson, Christine L. Case
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 21, Problem 2CA
Summary Introduction
To analyze:
The cause of recurrent infections in the given case.
Introduction:
Middle ear infection is the infection of ear drum and surrounding tissues. It is also called as otitis media and is common in childhood. Usually an antibiotic course clears it up.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
An American tourist was brought to the Emergency Room because of an alarming serpiginous track on his arm. The lesions itched continuously, and were painful to touch. He had just returned from holiday where he spent considerable period relaxing on public beaches, and had observed stray dogs on the beach.
Photograph of forearm showing serpiginous lesions.
a. What is the diagnosis ?
b. How is this infection acquired?
c. What therapy is appropriate?
d. Why are dogs and cats not permitted on beaches in resort areas?
A 9 year old boy with cystic fibrosis – a genetic disease that causes a number of problems, including the build-up of thick sticky mucus in the lungs- complained of increasing fatigue, shortness of breath and worsening cough. When his mother took him to the doctor, she mentioned that his cough was a blue green color. His doctor immediately suspected a lung infection by Pseudomonas aeruginosa a common complication of cystic fibrosis. A sputum was collected and sent to the clinical laboratory.
In the Clinical laboratory, the sample was plated onto Mac Conkey agar and blood gar and incubated. Mucoid colonies surrounded by bluish green color grew on both types of agar media. The colonies on Mac Conkey had no pink coloration, so the medical technologist concluded that the cells did not ferment lactose. She noted that the blue green color on the agar plates and in the sputum, knowing that P.aeruginosa makes several pigmented compounds that give rise to colors ranging from yellow to blue. One…
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 21 Solutions
Laboratory Experiments in Microbiology (11th Edition)
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
- 13) which of the following conditions is caused by a bacterium related to the bacteria that causes tuberculosis? It results in overgrowths on potentially all places on the body. a) leprosy b) none of these are caused by bacterium c) squamous cell carcinoma d) melanomaarrow_forwardA 19-year old female presented at the ER with fever, vomiting, intense headache and stiff neck. a )List three bacterial pathogens that would most likely be the cause of these signs and symptoms. Briefly describe each pathogen. b) What treatment would you immediately start?arrow_forwardAll of the following are true of Rocky Mountain spotted fever excepta) the disease is most prevalent in the western United States.b) it is caused by an obligate intracellular bacterium.c) it is a zoonosis transmitted to humans by ticks.d) those with the disease characteristically develop a hemorrhagic rash.e) antibiotic therapy is usually curative if given early in the disease.arrow_forward
- Different strains of Streptococcus pyogenes have different virulence factors, giving these microbes much versatility. Virulence factors include which of the following? Choose one or more: A.A capsule that, when thick, will help the organism avoid phagocytosis by macrophages B.A cell wall containing lipoteichoic acid, thought to facilitate adherence to pharyngeal epithelial cells C.Enzymes that lyse blood cells (streptolysins) D.The production of several endotoxins called streptococcal pyogenic endotoxins (SPEs)arrow_forwardDonna suddenly developed a sore throat accompanied by a fever of 103°F. When over-the-counter medication was ineffective, Donna sought the advice of her doctor. He took a throat culture and, anticipating that it might be a bacterial infection, he began her on a 10-day regime of antibiotics. Why is it important that the doctor confirms this is a bacterial infection, before prescribing antibiotics? Would the doctor prescribe antibiotics if this was a viral infection?arrow_forwardSeveral persons working in an exercise gym acquired an acute diseasecharacterized by fever, cough, pneumonia, and headache. Treatmentwith erythromycin cleared it up. The source was never found, but anenvironmental focus was suspected.a. What do you think might have caused the disease?b. People in a different gym got skin lesions after sitting in aredwood hot tub. Which pathogen could have caused that?arrow_forward
- Propionibacterium 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_forwarda 64 year old women comes to the physician because of the gradual decrease of her sense of taste and smell during the past 6 months . she has not had dryness of her eyes or nasal or oral membranes .physical examination including head and neck examination shows no abnormalities .A CT scan of the head shows a mass in the anterior ethmoidal air cells bilaterally . this patient’s tumor most likely has invaded which of the following structures . A) cavernous, B) cribriform plate, C) facial canal, D) petrotympanic fissures , e) pterygold canal.arrow_forward1. Which of the following is considered a vital sign? a) Bodyweight b) Blood type c) Lung capacity d) Heart rate 2. A person you support has an unusual rash on their leg. They say they are fine and they are acting normally, but you have never seen this type of rash before. Their medical plan does not mention a rash. What is the BEST next step? a) Document the symptoms b) Monitor the rash c) Report the rash d) Call 911 3. What is the term for a tool that uses numbers or pictures to help a person communicate about their pain? a) Poenagraph b) Vital signs c) Change monitor d) Pain scale 4. What condition is MOST likely to cause bloating and decreased appetite? a) Dehydration b) Constipation c) Aspiration d) Concussion 5. A person you support complains of chest pain. What is the BEST response? a) Document their symptoms b) Monitor for changes c) Call the nurse d) Call 911 6. In which of the following areas is a person MOST…arrow_forward
- why is peptidoglycan synthesis inportant in antibiotic activity? why do antibiotics not interfere with cell wall synthesis in the host cells?arrow_forwardWhy do the penicillin and cephalosporin groups of drugs have mildertoxicity than other antibiotics? What are their primary side effects?arrow_forwardIs it as effective to take two antibiotics sequentially as it is to take them simultaneously, as long as the total length of time that they are both taken is the same? Explain.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
