8. How An Uninvited Party Guest On a Monday morning in early July, Angela Thomps

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8. How An Uninvited Party Guest On a Monday morning in early July, Angela Thompson (31) and her child Natalie (9), Jason (6), and Marie (18 months) showed up in Dr. Jenkins's offcn what of cr without an appointment. All complained of severe, smelly diarrhea, gas, a red among family members, Dr. Jenkins was not overly concerned. He mended Imodium to stop the diarrhea, increased fluid consumption to dominal cramping, which began Friday evening. Since these generals are associated with dozens of self-limiting viral infections that are easily 11. How infec troduction of msicrobes alance normal flora or immunsty dehydration, and diet modification, including yogurt as a probiotic. He col a stool sample from litle Marie, who had conveniently soiled her diaper d their office visit. ilar symptoms. A few of these patients also complained of nausea, hea and mild fever. By Thursday morning Dr. Jenkins was truly concerned. E patients in four days had presented with the same symptoms and he had eve The next day Dr. Jenkins was surprised to examine six other patients earlier. Since he wasnt especially compliant with his prescribed antiviral therapy. Jake had suffered from several opportunistic infections associated with his i nocompromised status, When he arrived at Dr. Jenkins's practice today, Jake wa admitted one to the hospital. Jake (38) had been diagnosed HIV* seven years extremely dehydcated and had lost seven pounds in seven days due to the severe By late afternoon the results from Marie Thompson's stool specimen were back from the laboratory. The report confirmed giardiasis.- 1. What microbe is responsible for this condition? Characterize t organism. 2. Where is this microbe commonly found? How is it transmitted to humans? 1. What is the infctive dose for giardiasis? What is its incubation period 4. Outline the symptoms associated with this disorder. What is the duration of this illness? Are infected individuals always symptomatic? Who is at greatest risk of infection? 6 How is giardiasis diagnosed? 7. How is this infection treated? Dr. Jenkins contacted the county health department to report a suspected graph of outbreak. With their help, stool samples were collected from all of his affected patients and other local physicians were notified. Workers from the health depart ment were soon able to esablish an epidemiological link between the patiens. Ten days earlier everyone had celebrated the town's centennial, which itn a strawberry festival featuring shortcakes made with the locally grown the Taylor Family Farms. After a visit to the farms, it was determined that berries were irrigated using ditch water. Sampling water from various diths the vicinity of the fields yielded approximately half of the specimens positive the cysts of the suspected pathogen. The sale of produce from the Taylor Fa Farms was suspended, and the proprietors were ordered to use an approp water source for irrigation for uired Infections

Explanation / Answer

1. Giardiasis is caused by a parasite Giardia lamblia. This pathogen make colony and reproduce inside intestine. The main host for giardia is human. The structure of Giardia looks like a pear and has two nuclei and flagella.

2. Generally Giardia will be present in the areas like soil, water or food, specially if the areas contain the feces of animals who already have giardiasis. The infection contaminated with the help of cyst of giardia. Cyst is the reproductive stage for giardia and they can pass through the intestine with the help of contaminated water or food.

3. Less than 10 cyst can be able to generate giardiasis. Incubation period can vary between 7-10 days. However, in some instances 3-25 days is also observed.

4. The symptoms of giardiasis includes severe diarrhea , vomiting or nausea, loss of weight, loss of apetite, fever, abdominal cramps. The severe symptoms will lasts for 5-7 days and it may take months to recover from the effect of Giardia on intestine. Not every person who got the infection showed the symptoms of giardiasis. It is possible that people carry the cyst and also capable of spreading the disease without showing any symptoms of the Giardiasis.

5. The person who are living in the areas where the water is contaminated with giardiasis cyst, or who is living in direct or close contact with an infected person can easily get the diasese.

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