One summer, a group of tourists became ill after they all stayed at the same hotel in Greece. Epidemiologists conducted surveys among all the people who had stayed at that hotel during the two-and-a-half-week period in which people were reporting their illnesses. They did this in an attempt to determine the cause of the symptoms, which were primarily diarrhea and nausea. They surveyed 239 people; 224 of them reported having been ill while they were still on vacation or shortly after their return. Their diarrheal symptoms lasted 10-15 days. Seventy of the 224 people who reported illness were classified as having definite cases of gastrointestinal disease. A case was called “definite” when a pathogen could actually be recovered from their stool. Of these, the vast majority tested positive for one particular microorganism. Microscopic analysis of the stool samples revealed the presence of small oval-shaped structures, with defined outer walls and two to four nuclei inside. Diagnostic tests ruled out Cryptosporidium as the pathogen. What is your diagnosis (what is the disease)? What is the pathogen? What specific structures were seen in the stool? Epidemiologist interviewed the patients about their vacation activities and food intake to try to identify the environmental source of the infection. Only two types of food available in the dining room seemed to be associated with the illness: raw vegetables and salads. There was also a statistically significant relationship between illness and having consumed orange juice made from a mix (with hotel water). So what was the likely source? What is the treatment for this disease?

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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One summer, a group of tourists became ill after they all stayed at the same hotel in Greece. Epidemiologists conducted surveys among all the people who had stayed at that hotel during the two-and-a-half-week period in which people were reporting their illnesses. They did this in an attempt to determine the cause of the symptoms, which were primarily diarrhea and nausea. They surveyed 239 people; 224 of them reported having been ill while they were still on vacation or shortly after their return. Their diarrheal symptoms lasted 10-15 days. Seventy of the 224 people who reported illness were classified as having definite cases of gastrointestinal disease. A case was called “definite” when a pathogen could actually be recovered from their stool. Of these, the vast majority tested positive for one particular microorganism. Microscopic analysis of the stool samples revealed the presence of small oval-shaped structures, with defined outer walls and two to four nuclei inside. Diagnostic tests ruled out Cryptosporidium as the pathogen. What is your diagnosis (what is the disease)? What is the pathogen? What specific structures were seen in the stool? Epidemiologist interviewed the patients about their vacation activities and food intake to try to identify the environmental source of the infection. Only two types of food available in the dining room seemed to be associated with the illness: raw vegetables and salads. There was also a statistically significant relationship between illness and having consumed orange juice made from a mix (with hotel water). So what was the likely source? What is the treatment for this disease?

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