What is the normal habitat of this gram-negative, facultatively
anaerobic, non-endospore-forming, lactose-positive rod? Source:
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Exam II BIO 235 1. ch 22 A 37-week-old infant was delivered
by cesarean section and discharged from a Connecticut hospital when
he was 10 days old. Two days later he was lethargic and had a
fever. When he was readmitted to the hospital, he had multiple
brain abscesses caused by Citrobacter diversus. After a prolonged
illness, the baby died. A second infant with a normal pregnancy and
delivery died of C. diversus meningitis after a short illness. Nine
infants in the hospital nursery had umbilical cord colonization by
C. diversus. Environmental cultures were negative for hospital
equipment. a. What is the normal habitat of this gram-negative,
facultatively anaerobic, non-endospore-forming, lactose-positive
rod? b.Provide a plan for identifying the source of infection and
preventing further infection. (30 points) Figure 14.4 .png”
alt=”pastedGraphic.png”> 2) Salmonella heidelberg
gastroenteritis occurred on three cruises aboard the T.S.S.
Festivale. Figure 14.4 shows on-board clinic visits for diarrheal
illness between February 10 and March 3. a. Explain the incidence
pattern shown on the graph . b. What are probable modes of
transmission? c.. What changes would you recommend before the ship
books more cruises after March 3?(30 points) 3. A 56-year-old Army
officer received a smallpox vaccination at a military vaccination
clinic. Within 2 weeks, a painful ulcer was noted at the
vaccination site. Because of the appearance of an increasing number
of peripheral lesions and because of continued enlargement of the
initial ulcer, he was treated. Eventual recovery was complicated by
Pseudomonas sepsis and the need for a skin graft at the vaccination
site. What was the cause of the ulcer and lesions, and what were
the treatments? What caused the Pseudomonas infection? (30 points)
4. In the West Branch Study what are your thoughts on how the
investigation was done? It is a classic study. (10 Points)
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