For most kids, parechovirus is mild, but it can be deadly in newborns.
Parechovirus, a virus that can cause severe illness in infants, is on the rise in parts of the United States. Its a virus that can cause infection in humans and is most dangerous to newborns and infants. It’s spread by fecal-oral and respiratory routes. Humans, ferrets, and various rodents serve as natural hosts.
Twenty-nine infants were admitted to the Children’s Hospital at Vanderbilt University Medical Center in Nashville this year, which includes 23 admitted during a six-week period this spring, according to a new study. By contrast, only 19 cases were detected over five months in 2018.
Symptoms may include fever, fussiness, poor appetite, seizures , and meningitis (a potentially fatal inflammation of the membranes that cover the brain and spinal cord). This virus can also raise the risk of developmental problems later.
“Parechovirus is circulating in our population and will be missed if hospitals don’t use a test that looks for this virus,” said study author Romney Humphries. She is director of laboratory medicine at Vanderbilt.
Exactly why doctors are seeing an uptick in this virus now is not fully understood. It typically peaks in summer and fall.
Parechovirus as well as many other viral illnesses were relatively absent during the initial phase of the COVID-19 pandemic due to widespread shelter-in-place orders. “It may be simply due to more interactions, with children attending day cares and kids back in school,” said Humphries.
Of the 23 parechovirus cases in the study, 21 have recovered without complications. The most common symptoms seen were fever, fussiness, and a diminished appetite, the researchers found. One patient was to be examined for possible hearing loss. Another who suffered persistent seizures was expected to experience a severe developmental delay.
There is no specific treatment for this virus, and most infants do well with supportive care such as staying hydrated and taking steps to reduce any fever, Humphries said. This uptick in parechovirus is no reason for parents to hit the panic button, she noted.
The new report appears in the July 29 issue of the U.S. Centers for Disease Control and Prevention‘s Morbidity and Mortality Weekly Report.
Infectious disease experts not involved in the new study also urge prudence, not panic.
“This virus is still in circulation, and we are seeing new cases every week and are seeing a higher number of these cases than is typical,” said Dr. Cristina Tomatis Souverbielle, an infectious disease specialist at Ohio’s Nationwide Children’s Hospital in Columbus.
Rates should start to go down during September or October, Tomatis Souverbielle said.
The good news is that parechovirus usually causes mild symptoms. However, “anyone younger than 3 months with a fever should be seen by a provider,” she said.
“Parechovirus has been around for many years, and we see surges every couple of years,” said Dr. Roberta DeBiasi. She is the chief of pediatric diseases at Children’s National Hospital in Washington, D.C.
To diagnose the virus, doctors order a spinal tap that tests a sample of cerebrospinal fluid for a host of illnesses.
“Parechovirus is now included in this panel, but it wasn’t five years ago, so that could also explain the uptick,” DeBiasi said.