Microbiology with Diseases by Taxonomy (5th Edition)
5th Edition
ISBN: 9780134019192
Author: Robert W. Bauman Ph.D.
Publisher: PEARSON
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Textbook Question
Chapter 19, Problem 1CCS
Clinical Case Study A Fatal Case of Methicillin-Resistant Staphylococcus aureus (MRSA)
A five-year-old girl was admitted to the hospital with a temperature of 103°F and pain in her right hip. After pus was surgically drained from the hip joint, she was treated with a semisynthetic cephalosporin. Her physicians changed the antibiotic regimen after 24-hour cultures of blood and pus revealed the presence of MRSA. On the third day, she suffered respiratory failure and empyema and was placed on mechanical ventilation. She died from pulmonary hemorrhage and pneumonia after five weeks of hospitalization. The girt had been previously healthy with no recent hospitalizations. She had skinned her knee while learning to ride a bicycle two days before admittance to the hospital.
- 1. How might the girt have been infected?
- 2. How did her hip joint become infected?
- 3. Describe the series of diseases she suffered.
- 4. What was likely the second antibiotic she received?
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Question #3:
In the KeyGene paper, the authors state that it would be useful if pollen from an apomict would
transmit apomixis-inducing genes to the female in the cross (assuming the pollen is viable). Assuming
there was just one gene conferring gametophytic obligate apomixis, and that the two parents are
inbreds, what would be the consequences of such a cross if:
a) The apomixis was a dominant trait? Indicate the genotypes and phenotypes (apomict or non-
apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic
and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female
first (left side) in the parental cross.
b) The apomixis was a recessive trait? Indicate the genotypes and phenotypes (apomict or non-
apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic
and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female
first (left side) in the…
Question #5:
Assume that two genes are identified that confer gametophytic facultative apomixis in soybean. The
genes show independent assortment. Recessive alleles at both loci are required for the facultative
apomixis. Facultative apomixis is triggered when the temperature at pollination is above 20 degrees C.
At temperatures below 20 degrees C, all reproduction is sexual, independent of genotype.
A facultative apomict male, capable of producing viable pollen, was crossed with a sexually
reproducing female. Assuming the parents are completely inbred, what are the predicted phenotypic
ratios (apomict: non-apomict) for the F1, F2, and DH (F1-derived) generations at each of the following
temperatures*:
a) 15°C?
b) 25°C?
*for full credit, show crosses and genotypes where appropriate. Remember to position the
female first (left side) in the cross.
Type your answer here:
Chapter 19 Solutions
Microbiology with Diseases by Taxonomy (5th Edition)
Ch. 19 - Prob. 1MCCh. 19 - Prob. 2MCCh. 19 - Prob. 3MCCh. 19 - Prob. 4MCCh. 19 - Prob. 5MCCh. 19 - Prob. 6MCCh. 19 - Prob. 7MCCh. 19 - Prob. 8MCCh. 19 - Prob. 9MCCh. 19 - Prob. 10MC
Ch. 19 - Which of the following is not characteristic of...Ch. 19 - Prob. 1MCh. 19 - Prob. 1SACh. 19 - Prob. 2SACh. 19 - Contrast tuberculoid leprosy with lepromatous...Ch. 19 - Prob. 4SACh. 19 - Why do pediatricians recommend that children under...Ch. 19 - Prob. 6SACh. 19 - Prob. 7SACh. 19 - Prob. 8SACh. 19 - Prob. 9SACh. 19 - Prob. 10SACh. 19 - Prob. 11SACh. 19 - Prob. 12SACh. 19 - Prob. 1VICh. 19 - Prob. 2VICh. 19 - A few days after the death of a child hospitalized...Ch. 19 - Prob. 2CTCh. 19 - Prob. 3CTCh. 19 - Prob. 4CTCh. 19 - Prob. 5CTCh. 19 - Prob. 6CTCh. 19 - Prob. 1CMCh. 19 - Prob. 1TMWCh. 19 - In 1928, Frederick Griffith discovered genetic...Ch. 19 - Prob. 3TMWCh. 19 - Prob. 4TMWCh. 19 - Why does use of broad-spectrum antibacterial drugs...Ch. 19 - Prob. 6TMWCh. 19 - Why do pediatricians refrain from using...Ch. 19 - Why is it necessary to get a diphtheria...Ch. 19 - Prob. 9TMWCh. 19 - Prob. 10TMWCh. 19 - Why does Actinomyces appear purple with a Gram...Ch. 19 - Clinical Case Study A Fatal Case of...Ch. 19 - Prob. 2CCSCh. 19 - Prob. 1EDCS
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