Enlarge / A rat drinks water in a back alley in the Park View neighborhood near a construction site on Saturday, September 10, 2017, in Washington, D. C. (credit: Getty | The particular Washington Post )
Many people might already think of the nation’s capital as a political rat’s nest, teeming with rat-related features, like underground networks and crowded backrooms where any faint smell of betrayal could send lawmakers scurrying. But Washington, DC, is also a den of literal rats. And it’s creating the concerning risk of viral spillover for residents.
In a report released Thursday by the Centers for Disease Control and Prevention , DC health officials ratted out the first two known cases of hantavirus spillover within the city. The virus festers quietly in rats and other rodent populations, but in humans it can cause potentially deadly respiratory and hemorrhagic diseases. Humans pick up the infection by direct contact with rodent urine or nest dust or simply by breathing in aerosolized viral particles from urine, droppings, or saliva. There’s also the possibility that the virus can spread from rat bites, but this is less common. Once in a human, the virus almost never jumps from human to human.
Fortunately for DC residents, the type associated with hantavirus found in the city is one of the milder types: an “Old World” hantavirus called the Seoul virus. Old World hantaviruses cause a disease known as Hemorrhagic fever with renal syndrome . HFRS can start out like a new generic infection with fever, chills, nausea, and headache. But it can progress to low blood pressure, acute shock, vascular leakage, and acute kidney failure, the particular CDC notes. The severity regarding HFRS varies by which hantavirus you catch, but fatality rates may reach up to 15 percent. The Seoul virus is one of the milder forms, with a fatality rate of only about 1 percent. As such, in both of the cases reported by DC health officials, typically the infected individuals recovered.
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