A new invasive tick species capable of transmitting several serious diseases is spreading across the United States and posing an emerging threat to human and animal health, according to a pair of reports released Thursday.
The Asian Longhorn (19459011) is the first invasive tick that has arrived in the United States for about 80 years. She is originally from East China, Japan, the Russian Far East and the Korean Peninsula and is now also based in Australia and New Zealand.
Last August, she was discovered on a 12-year-old sheep from Iceland western New Jersey. Since then, the tick has been found in Arkansas, Connecticut, Maryland, New York, North Carolina, Pennsylvania, Virginia, and West Virginia. The species has been found in domestic animals, livestock, wildlife and humans. So far, however, there is no indication that the tick has spread pathogens to humans, pets or wildlife in the United States. This is the result of a report from Centers for Disease Control and Prevention.
But public health officials worry about the potential for Haemaphysalis longicornis to spread disease. In other parts of the world it is a significant cattle pest; Their bites can make people and animals sick. In some areas of Australia and New Zealand, the ticks suck so much blood from dairy cattle that milk production goes down by 25 percent, researchers have found.
In Asia, the tick carries a virus that causes human hemorrhagic fever and kills up to 30 percent of its victims. Although this virus is not found in the United States, it is closely related to the Heartland virus, another life-threatening, tick-borne disease circulating in the United States. Health officials are particularly concerned about the tick's ability to become a vector for this virus and other tick-borne diseases in the United States.
The tick "is potentially capable of spreading a large number of diseases," said Lyle Petersen, director of the CDC Division of Vector-Driven Diseases. "We really do not know if this ticks spread disease in the United States and if so, to what extent. But it is very important that we find out quickly. "
The female tick can also lay hundreds of fertile eggs without mating," which leads to massive host diseases, "said the CDC report.
Mosquito, ticks and goat diseases According to CDC, the flea bite It has more than tripled in the United States from 2004 to 2016. The increase in these vector-borne diseases has many underlying causes: travel and trade expansion, urbanization, population growth, and rising temperatures.
Warming temperatures and climate change make the environment tick-borne or More hospitable mosquitoes that spread pathogens and increase the number of pathogens Seasonal when ticks are active, Petersen said.
Next week officials from various federal agencies will meet – including the CDC, the Agriculture Department, the Environmental Protection Agency, the National Park Service, and the Defense Department – to develop a national coordini strategy to combat these vector-borne diseases.
"The problems are getting worse," said Petersen, noting that every state except Alaska is struggling with an increase in these diseases. "We are losing this fight."
Officials said they are trying to sensitize public health officials, health professionals, and veterinarians to the potential threat posed by this species. In addition to the CDC report, Petersen and CDC colleagues published a paper accompanying the American Journal of Tropical Medicine and Hygiene, which highlighted the "significant gaps" in public health systems' ability to respond to these diseases.
Many diseases spread from ticks are not reported. There are also no proven measures that are scalable to control many vector-borne diseases transmitted by the black-legged or deer wedge that spreads at least seven human pathogens in the United States, including the bacteria that cause Lyme borreliosis cause. 19659015] Officials do not know when or how long the long-suffering Zeck arrived in the US. Between August 2017 and September 2018, 53 ticks were reported in the United States. The states with the highest percentage of infested counties are New Jersey (33 percent), West Virginia (20 percent) and Virginia (12 percent), including Fairfax County, a suburb of D.C. By retrospective analysis, scientists believe that the invasion took place years ago.
Tadhgh Rainey, an entomologist from the Hunterdon County Department of Health in New Jersey, discovered the ticks on August 1, 2017, when a woman who had her pet shaved Icelandic sheep arrived at the division, in her opinion mites was the hands.
On closer examination, they proved to be larval ticks. And she was covered with it.
"She had them all over her clothes. We talk about 1,000 ticks about her body, "recalls Rainey in an interview. "It was a species I had never seen before." Rainey's assistant provided the woman with a locker room, and public health officials put their pants in a freezer to kill the ticks.
When Rainey tried to identify the species, the wife returned about two weeks later, this time with adult ticks on her sheep. Rainey said he realized it was nothing he had ever seen before, and went to her farm to see the animal for herself.
"They were embedded in sheep everywhere, thousands of them in the ears, too many to count."
Andrea Egizi, a researcher at the Tick-borne Disease Laboratory in Monmouth, Rutgers University, identified the tick by DNA analysis and its identity was later confirmed by USDA scientists.
Rainey said the tick was probably from a large animal in the United States. This part of the state has an active trade in horses and sheep overseas. The affected sheep had never traveled abroad. "Or it could have been transferred to a person who participated in a nature walk in New Zealand," he said.
Ministry of Health officials were able to kill all the ticks of the sheep and eliminate them on the woman's property. The sheep, named Hannah, died recently in old age, Rainey said. The health department has the woman's pants because "she still does not want her pants."
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