EP MICROBIOLOGY:W/DISEASES BY..-MOD.ACC
5th Edition
ISBN: 9780134607894
Author: BAUMAN
Publisher: PEARSON CO
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Chapter 4, Problem 1EDCS
Necrotizing Fasciitis
Fever, chills, nausea, weakness, and general yuckiness. Carlos thought he was getting the flu. Further, he had pulled a cactus thorn from his arm the day before, and the tiny wound had swollen to a centimeter in diameter. It was red, extremely hot, and much more painful than such a puncture had a right to be. Everything was against him. He couldn’t afford to miss days at work, but he had no choice.
He shivered in bed with fever for the next two days and suffered more pain than he had ever experienced, certainly more than the time he broke his leg. Even more than passing a kidney stone. The red, purple, and black inflammation on his arm had grown to the size of a baseball. It was hard to the touch and excruciatingly painful. He decided it was time to call his brother to take him to the doctor. That decision saved his life.
Carlos’s blood pressure dropped severely, and he was unconscious by the time they arrived. The physician immediately admitted Carlos to the hospital, where the medical team raced to treat necrotizing fasciitis, commonly called “flesh-eating” disease. This reemerging disease is caused by group A Streptococcus, a serotype of Gram-positive bacteria also known as Streptococcus pyogenes. Group A strep invades through a break in the skin and travels along the fascia-the protective covering of muscles-producing toxins that destroy human tissues, affecting about 750 people each year in the United States.
By cutting away all the infected tissue; using high-pressure, pure oxygen to inhibit bacterial growth; and applying antimicrobial drugs to kill the bacterium, the doctors stabilized Carlos. After months of skin grafts and rehabilitation, he returned to work, grateful to be alive. (For more about necrotizing fasciitis, see pp.560-561.)
1. What color do cells of S. pyogenes appear after the
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A 56-year-old man complained of progressive fatigue and malaise. His physical examination was generally satisfactory, with a pulse of 90 beats per minute, and multiple lymphadenopathy and hepatomegaly. No bacteria were found in cerebrospinal fluid smears of lumbar puncture, but a flagellum, elongated nucleus with blue and red cytoplasm were found in the blood by Giemsa staining of thin blood smears. The family reported that the patient had been engaged in transportation business in Africa for many years.
1. What do you think is the most likely disease for this patient?
Malaria
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Bacterial meningitis
2. What do you think is the most likely pathogen for this patient?
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Trypanosoma brucei gambiense
3. What do you think is the most direct basis for the diagnosis of the pathogen?
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Special structure was found on blood…
Bruno, a 48-year-old businessman, presents at the emergency room with a 12-day history of headache, myalgia, nausea, and vomiting. Patient history reveals that Bruno is a consulting engineer for the Panama Canal. Prior to his latest trip, he failed to fill a prescription for prophylactic medication. However, according to his general physician's records, all his immunizations (e.g., hepatitis, flu) are up to date. His fever was 103° F (39° C) at the time of initial examination, but alternated with periods of extreme cold and cyanosis. A complete blood count was ordered, along with parasite examination, and urinalysis. The thin Giemsa film yielded the morphologic forms in the image below.
What parasite (genus and species) do you suspect?
What is the life stage for the parasite recovered from this blood sample?
How did Bruno acquire this infection
How should the physician order the blood collection for parasite examination in this case?
Chapter 4 Solutions
EP MICROBIOLOGY:W/DISEASES BY..-MOD.ACC
Ch. 4 - Prob. 1TMWCh. 4 - Why is a Gram-negative bacterium colorless but a...Ch. 4 - Why didnt Linnaeus create taxonomic groups for...Ch. 4 - Necrotizing Fasciitis Fever, chills, nausea,...Ch. 4 - Why is magnification high and color absent in an...Ch. 4 - Prob. 1MCCh. 4 - Prob. 2MCCh. 4 - Prob. 3MCCh. 4 - Curved glass lenses _________ light. a. refract b....Ch. 4 - Prob. 5MC
Ch. 4 - Prob. 6MCCh. 4 - Prob. 7MCCh. 4 - Prob. 8MCCh. 4 - Prob. 9MCCh. 4 - In the binomial system at nomenclature, which term...Ch. 4 - Prob. 1FIBCh. 4 - Prob. 2FIBCh. 4 - Prob. 3FIBCh. 4 - Fill in the Blanks 4. ___________ refers to...Ch. 4 - Fill in the Blanks 5. Cationic chromophores such...Ch. 4 - Prob. 1VICh. 4 - Label the microscope.Ch. 4 - Prob. 1SACh. 4 - Critique the following definition of magnification...Ch. 4 - Prob. 3SACh. 4 - Put the following substances in the order they are...Ch. 4 - Prob. 5SACh. 4 - Prob. 6SACh. 4 - Prob. 7SACh. 4 - Prob. 8SACh. 4 - Miki came home from microbiology lab with green...Ch. 4 - Why is the definition of species as successfully...Ch. 4 - With the exception of the discovery of new...Ch. 4 - Prob. 4CTCh. 4 - Prob. 5CTCh. 4 - In what ways are the Gram stain and the acid-fast...Ch. 4 - Microbiologists have announced the discovery of...Ch. 4 - Why is the genus name Coccus placed within...Ch. 4 - A clinician obtains a specimen of urine from a...Ch. 4 - Using the following terms, fill in the following...
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