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
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Chapter 18, Problem 3CAE
Summary Introduction
Case summary:
Legionellosis or Legionaries disease is a condition of fever, chills, cough and headache. It causes inflammation and organ involvement are liver, kidney and CNS. Pneumonia occurs in some patients.
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An elderly man with influenza acquires a case of pneumonia. Gram-positive cocci isolated from his
sputum give beta-hemolysis on blood agar. The infection is very difficult to treat. Later, it is shown
that the man shared the room with a patient with bone infection. Isolates from both infections were
the same.
a. Describe 2 biochemical tests that can be used for the definitive diagnosis.
b. Describe 2 virulence factors of this pathogen and implicate them in diseases.
Consider the photos here which demonstrate antibiotic sensitivities of Staphylococcus aureus strains as determined by the Kirby-Bauer method. Abbreviations are as follows: C = chloramphenicol; CC = clindamycin; CZ = cefazolin; E = erythromycin; NOR = norfloxacin; OX = oxacillin; P = penicillin; RA = rifampin; SAM = sulbactam-ampicillin; SXT = sulfatrimethoprim; TE = tetracycline; VA = vancomycin.
Imagine that only two cellular changes occurred in the original strain (the first image, on the top) that resulted in the resistance pattern of the strain in the second image (on the bottom). Which combination of mechanisms could explainthese results?Choose one or more:
A.expression of efflux pumps
B.overproduction of PABA
C.production of β-lactamase
D.altered penicillin-binding protein
E.modification of either 50S or 30S ribosomal subunits
F.altered DNA gyrase
I AM TRYING TO IDENTIFY THIS UNKNOWN.
IMAGE 1 HAS TWO PICTURE OF CATALASE TEST AND BLOOD AGAR TEST.
I believe it is one of the following:
1) S. pyo.
2)S. agal .
3)S.pneu.
4)E. faecalis
5)S. aureus
6)S epi.
7)S. sapro.
8)M. luteus
Please let me know which test will i need out of the table to justify your reason of picking up the unknown and also how that test justifies it? what characteristics of that test made you pick the unknown?
Chapter 18 Solutions
Microbiology: An Introduction (13th Edition)
Ch. 18 - Which could cause the disease it is supposed to...Ch. 18 - Define the following terms, and give an example of...Ch. 18 - DRAW IT Label the components of the direct and...Ch. 18 - How are monoclonal antibodies produced? What is...Ch. 18 - Explain the effects of excess antigen and antibody...Ch. 18 - Prob. 6RCh. 18 - How does the antigen in an agglutination reaction...Ch. 18 - Match the following serological tests in column A...Ch. 18 - Prob. 9RCh. 18 - Prob. 10R
Ch. 18 - Prob. 1MCQCh. 18 - Prob. 2MCQCh. 18 - Prob. 3MCQCh. 18 - Prob. 4MCQCh. 18 - Prob. 5MCQCh. 18 - Prob. 6MCQCh. 18 - Prob. 7MCQCh. 18 - Test used to identify rabies virus in the brain of...Ch. 18 - Prob. 9MCQCh. 18 - Prob. 10MCQCh. 18 - What problems are associated with the use of live...Ch. 18 - Prob. 2ACh. 18 - Prob. 3ACh. 18 - Which of the following is proof of a disease...Ch. 18 - Prob. 2CAECh. 18 - Prob. 3CAE
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