In collaboration with the American ...

In collaboration with the American Medical Association, American pampers Association-American Nurse Foundation, the U provender and Drug Administration's Center for rations Safety and Nutrition, and the U Department of Agriculture's cheer Safety and Inspection Service, the Center for Disease govern and Prevention (CDC) has issued recently made known recommendations for diagnosing, managing, and reporting foodborne illnesses. The report focuses upon recognizing suspicious symptoms, disease clusters, and etiologic agents, and reporting cases of foodborne illness to public health authorities. Summary tables and charts, allusions and resources for health care professionals are provided. Patient scenarios, clinical vignettes, and a continuing medical education composing also are included. The replete report is available in the April 16 2004 issue of the Morbidity and Mortality Weekly Report: Recommendations and Rationale and online at http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5304a1.htm.

Clinical Considerations

The CDC estimates that 76 million bodys get sick, 300,000 are hospitalized, and 5000 die as a arise of foodborne illnesses per year. Primarily same young, elderly, and immunocompromised patients are affected. Foodborne illness can be caused by means of microorganisms and their toxins, marine organisms and their toxins, fungi, and their related toxins, and chemical contaminants. feeds that have been linked to outbreaks include milk, shellfish, unpasteurized apple cider, raw and undercook harasss fish, raspberries, strawberries, and ready-to-eat meats. The accompanying table lists etiologic agents to consider for various manifestations of foodborne illness.

Recognizing Foodborne Illness

Patients with foodborne illnesses typically instant with gastrointestinal tract symptoms (eg vomiting, diarrhea, abdominal pain), on the contrary nonspecific symptoms and neurologic symptoms also may offer Important clues to determining the etiology of a foodborne disease are the incubation period, duration of the illness, predominant clinical symptoms, and population involved in the outbreak.

Diagnosis

Establishing a diagnosis can be difficult, particularly in patients with persistent or chronic diarrhea, those with plain abdominal pain, and those who have an underlying disease proces Because viral syndrome has a similar presentation, it must be exclud before suspecting foodborne illness. excitement diarrhea, and abdominal cramps can be ready or absent in viral or foodborne illness, for a like reason they are not good indicators. The absence of myalgias or arthralgias would make a viral syndrome les likely. Foodborne illnesses that target the neurologic method tend to cause paresthesias, weakness, and paralysis. The vicinity of dysentery (bloody diarrhea) also is more indicative of a foodborne illness, particularly if it is early in the course of the illness.

If any of the following signs and symptoms come into one's head in patients, alone or in combination, laboratory testing may provide diagnostic strings (attention should be given to true young, elderly, or immunocompromised patients):

* cruel diarrhea

* Diarrhea leading to dehydration

* Fever

* postponeed diarrhea (three or more unformed stools by day, persisting several days)

* Neurologic involvement, as it is as paresthesias, motor weakness, cranial self-command palsies

* quickly prepared onset of nausea, vomiting, diarrhea

* austere abdominal pain

Clinical Microbiology Testing

Stool agricultures are indicated if the patient is immunocompromised, febrile, has murderous diarrhea, has severe abdominal pain, or if the illness is clinically hard or persistent. Stool cultures also are attract favor toed if the fecal leukocyte deem is high. Stool examination for parasites generally is indicated for patients with suggestive travel histories, those who are immunocompromised, those who bear up under chronic or persistent diarrhea, or when the diarrheal illness is unresponsive to appropriate antimicrobial therapy. Stool examination for parasites also is commended for gastrointestinal tract illnesses that appear to have a in extent incubation period. Blood cultures should be obtained when bacteremia or systemic infection is suspected.

Treatment

Selection of appropriate treatment hangs on identification of the responsible pathogen (if possible) and determining if specific therapy is available. Many episodes of acute gastroenteritis are self-limiting and require fluid replacement and supportive care. Oral rehydration is indicated for patients who are mildly to moderately dehydrated; intravenous therapy may be required for more rigorous dehydration. Routine use of antidiarrheal agents is not commited because many of these agents potentially have serious adverse imports in infants and young children. Antimicrobial therapy should be based forward clinical signs and symptoms; the organism discovered in clinical specimens; antimicrobial susceptibility tests; and appropriateness of antibiotic treatment (some enteric bacterial infections are best not treated).

Surveillance and Reporting of Foodborne Illness