Health
Warming planets increase the risk of deadly tick-borne fever
November 16, 2020-Climate ChangeIs already associated with more frequent wildfires, longer droughts, and more tropical cyclones, and may increase the risk of developing a potentially deadly tick-borne disease known as Rocky Mountain Spotted Fever. There is, a new study suggests.
When temperatures rise, the ticks, which carry the bacteria that cause the disease, can more than double the dog-to-human feeding preferences, according to researchers at the University of California, Davis. They will present their work today at the Annual Meeting of the American Society of Tropical Medicine and Hygiene.
“That risk [of contracting the disease] Climate change can increase as hot climates become more frequent, “says Laura Bucks, a graduate student at the University of California, Davis.
Rocky Mountain Spotted Fever, various types Tick In the United States, there are deaths Percentage of According to the CDC, 30% can die quickly if not treated within 5 days of the onset of symptoms. Some of the symptoms are fever, rash, severe headache, Swelling around Eye And the back of the hand, and stomach Problems such as vomiting Or nausea.
Blood tests can help you make a diagnosis.Usually treated with antibiotics Doxycycline 5-7 days.
Cases of Rocky Mountain spotted fever and related diseases, collectively known as spotted fever rickettsiae, have increased significantly over the last two decades. In 2000, 495 cases were reported in the United States. By 2017, the total was over 6,000. According to the CDC, the number of cases in 2018 decreased slightly.
Human vs. dog experiment
To observe the effect of temperature on the taste of dog and human-feeding mites, researchers put two large wooden boxes, about 3 feet high and 2 feet wide, connected by clear plastic tubes. I made. When the ticks were released into the tube, the person sat in one box and the dog in the other.
Researchers watched for 20 minutes whether the tick was heading at the dog or at the person. When the temperature is 74 degrees and when it is 100 degrees.
Researchers have pre-tested mites to make sure they are not infected. They placed meshes on both ends of the tube, so mites could not come into contact with dogs or people.
Researchers have studied two types of mite, known as temperate and tropical. Both can carry this disease. Tick of tropical pedigree has changed their taste from dog to human. The temperate zone was, but not so much, Backus says. Researchers can’t say why.
Outlook
According to the study, “in warm climates, this vector increases the risk of transmission of Rocky Mountain spotted fever,” said Dr. Kathleen Walker, an associate expert and entomology associate at the University of Arizona at Tucson. .. As a result of the survey, I was not involved in the research.
She says the tick lives in and around the house. “People find these ticks in their beds.” The best precaution is to treat the dog-with a tick collar, an oral tick drug prescribed by a veterinarian, or a topical tick preparation.
“How these come in contact [with people] “Through the dog,” Walker said, “If you protect your dog, you protect yourself.”
Walker also proposes to take all tick bites seriously. “Remove it as soon as possible,” she says, using forceps to pull it out. Keep an eye on the area. If you have a fever or a rash, see a doctor right away, she says. Be sure to tell your healthcare provider that you have been bitten.
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