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Coxsackieviruses are divided into group A and group B viruses based on early observations of their pathogenicity in neonatal mice. [1] Group A coxsackieviruses were noted to cause a flaccid paralysis (which was caused by generalized myositis) while group B coxsackieviruses were noted to cause a spastic paralysis (due to focal muscle injury and degeneration of neuronal tissue).
Coxsackie A virus is a subgroup of enterovirus A, which are small, non-enveloped, positive-sense, single-stranded RNA viruses. Its protective, icosahedral capsid has an external portion that contains sixty copies of viral proteins (VP1,-2,-3) and an internal portion surrounding the RNA genome containing sixty copies of VP4 viral proteins.
Coxsackie B infections usually do not cause serious disease, although for newborns in the first 1–2 weeks of life, Coxsackie B infections can easily be fatal. [2] The pancreas is a frequent target, which can cause pancreatitis. [2] Coxsackie B3 (CB3) infections are the most common enterovirus cause of myocarditis and sudden cardiac death. [8]
Schizophrenia is also linked to neonatal infection with Coxsackie B virus (an enterovirus), which one study found carries an increased risk of adult onset schizophrenia. [103] Prenatal exposure to influenza virus in the first trimester of pregnancy increases the risk of schizophrenia by 7-fold. [104] Severe acute respiratory syndrome
When first discovered, it was labelled as a coxsackie A virus, A23. It was later discovered that A23 was an echovirus antigenically identical to the already-known echovirus 9. [2] Echovirus 9 is the most common enterovirus type. [3] It is a common cause of illness in humans, although unlike many enteroviruses, it rarely infects infants. [3]
Patients with Coxsackie B4 virus have seemed to have herpangina, tonsillitis, and pharyngitis. [6] CB4 virus has caused transplacental infections in mice. Infection in the first couple weeks of gestation has been shown to be harmful for dams as well as the fetus, causing reduced litter sizes, abortion, or stillbirth.
Exposure to those toxins during pregnancy can create serious health issues in elementary school children that can affect their lives for years to come, a new study found.
Bornholm disease, also known as epidemic pleurodynia, [1] is a condition characterized by myositis of the abdomen or chest caused by the Coxsackie B virus or other viruses. [2] The myositis manifests as an intermittent stabbing pain in the musculature that is seen primarily in children and young adults.