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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-induced cardiomyopathy is a potential result of virally induced myocarditis. This cardiomyopathy may present with symptoms such as chest pain, fatigue, heart failure, cardiogenic shock, arrhythmias or sudden death. [7] These symptoms are a by-product of sustained cardiac muscle damage.
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.
A new study by the University of Cambridge outlines when we are most vulnerable to viruses and what we can do about it.
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]
Coxsackie b viruses are usually spread to infants through perinatal transmission. However, more severe cases of coxsackie B viruses are spread through transplacental transmission. Common symptoms of neonatal coxsackie B virus infection in children include meningitis and/or encephalitis.
Usually, herpangina is produced by one particular strain of coxsackie virus A (and the term "herpangina virus" refers to coxsackievirus A), [1] but it can also be caused by coxsackievirus B or echoviruses. [2] Most cases of herpangina occur in the summer, [3] affecting mostly children. However, it occasionally occurs in adolescents and adults.
Over the last couple of decades, numerous culprits have been identified as playing a role in myocarditis pathogenesis in addition to the enterovirus, which at first was the most commonly implicated virus in this pathology. [50] One of the most common enteroviruses found to be responsible for causing Myocarditis is the Coxsackie B3 virus. [50]