Coxsackie B
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Coxsackie B virus |
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Coxsackie B is the name of a group of six serotypes of pathogenic enteroviruses that trigger illness ranging from mild gastrointestinal distress to full-fledged pericarditis and myocarditis.[1]
Geographic Distribution
The various members of the Coxsackie B group were discovered almost entirely in the United States, appearing originally in Connecticut, Ohio, New York, and Kentucky, although a sixth member of the group has been found in the Philippines.[1] That said, all six serotypes have a global distribution and are a relatively common cause of gastrointestinal upset.
Symptoms
Symptoms of infection with viruses in the Coxsackie B grouping include fever, headache, sore throat, gastrointestinal distress, as well as chest and muscle pain. This presentation is known as pleurodynia or Bornholmes disease in many areas. Sufferers of chest pain should see a doctor immediately - in some cases, viruses in the Coxsackie B family progress to myocarditis or pericarditis, which can result in permanent heart damage or death. Coxsackie B virus infection may also induce aseptic meningitis. As a group, they are the most common cause of unexpected sudden death, and may account for up to 50% of such cases.[1] The incubation period for the Coxsackie B viruses is, like most of the Enteroviridae, highly variable, ranging from 2 to 35 days, and illness may last for up to two weeks, but may resolve as quickly as two days. Infection usually occurs between the months of June and October.[1]
Diagnosis
Enterovirus infection is diagnosed mainly via serological tests such as ELISA[1] and from cell culture.[1] Because the same level and type of care is given regardless of type of Coxsackie B infection, it is mostly unnecessary for treatment purposes to diagnose which virus is causing the symptoms in question, though it may be epidemiologically useful.
Viral Structure and Function
Coxsackie B viruses are single-strange positive-sense RNA viruses that are resistant to a wide variety of chemical treatments. The viral particles themselves are roughly 30nm icosahedrons.[1] The virus is most frequently distributed via the fecal-oral route, and infection commonly occurs after eating contaminated food. Coxsackie B viruses are cytolytic, and Coxsackie B2 and B5 viruses have been implicated in hand, foot and mouth disease as well as respiratory infection.[1] Infection in infants is mostly asymptomatic, but sometimes results in the death of the infant, often due to myocarditis.[1] Birth defects may also be present in a Coxsackie B infected infant.
Diabetes
The B4 strain of Coxsackie viruses has been discovered to be a possible cause of Diabetes mellitus type 1.
Treatment and Prevention
As of 2007, there is no treatment for the Coxsackie B group of viruses.[1] Pallative care is available, however, and patients suffering chest pain or stiffness of the neck should be examined for signs of cardiac or central nervous system involvement, respectively. Some measure of prevention can usually be achieved by basic sanitation on the part of food-service workers, though the viruses are highly contagious. Care should be taken in washing ones hands and in cleaning the body after swimming. In the event of Coxsackie-induced myocarditis or pericarditis, antiinflammatories can be given to reduce damage to the heart muscle. There is no vaccine for any member of the group.
Notes
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
