Tag Archives: infectious disease

Zika

As if we didn’t have enough insect and tick born diseases to worry about, an emerging risk is the relatively new (to the western hemisphere) Mosquito born Zika virus. Add it to other scourges around Arkansas such as Rocky Mountain Spotted Fever, Erhlichiosis, and Tularemia from ticks (also deer flies for Tularemia), and mosquito born West Nile Virus and St. Louis encephalitis (SLE). Any and all of these diseases can have serious consequences especially if left untreated.

Zika is a new viral disease which is projected to be an issue in the future in much of the United States including Arkansas because of the ability of the host to breed and spread in a number of climatic niches. The mosquito vector, genus Aedes, is a day-time feeder and is said to be able to reproduce is a bottle cap’s worth of water. So far no known disease transmission from mosquito bites has occurred in the United States, but transmission from bites has occurred in two territories in western hemisphere, Puerto Rico and and the US Virgin Islands. There are reported cases in most states from travelers who were exposed overseas.

Zika was discovered in 1947 in Uganda. From the 1960s to 1980s, human infections were found across Africa and Asia, typically accompanied by mild illness. The symptoms are common to a number of other mosquito born viral infections. From there the virus moved to south-east Asia and across the Pacific. During a 2013-14 outbreak in French Polynesia, the neurological disorder Guillain-Barré syndrome was linked to Zika infection. In South America, the first reports of locally transmitted infection came from Brazil in May 2015. In July 2015 Brazil reported an association between Zika virus infection and GBS.

It is only a matter of time until the local mosquito population becomes infected with the Zika virus, and begins to spread the disease among humans. The most frightening aspect of the disease which has recently been confirmed by the US Centers for Disease Control (CDC) is a unique birth defect that occurs in the offspring of infected women. Microcephaly is a condition where the infant is born with an abnormally small head and underdeveloped brain. Brazil has reported a rate of about 2,500 cases of microcephaly.

The disease has also been shown to be transmitted by blood and semen. Men with the virus have been know to transmit the disease to sex partners. It is currently not know if women can infect partners.

The condition results in a poor prognosis for normal brain function and individuals have a greatly reduced life expectancy. Although there can be other causes of microcephaly, the CDC has affirmed the connection between the Zika virus and the Brazilian outbreak.

Two months ago President Obama asked congress to appropriate 1.8 billion dollars to fight the spread of the disease. The republican controlled Congress has so far refused to act on the request. Without congressional support to fight the disease the president has no choice but to switch funding within the CDC, taking it away from monies committed to surveillance and treatment of Ebola.

Congress, name your poison.