贵阳怎么治海绵状血管瘤(贵阳鲜红斑痣如何治疗) (今日更新中)

MORGANTOWN, W.V. – Murder hornets have had their time in the spotlight. Now, scientists say they've discovered “zombie cicadas.”It's a playful name from researchers at West Virginia University, who say they've found that a parasitic fungus, called Massospora, can play mind games on cicadas, causing them to infect others.Researcher showed that the psychedelic fungus can manipulate male cicadas into flicking their wings like females – a mating call – which tempts unsuspecting male cicadas and infects them.The fungus contains chemicals like those found in hallucinogenic mushrooms, according to research published in the journal PLOS Pathogens.“Essentially, the cicadas are luring others into becoming infected because their healthy counterparts are interested in mating,” said Brian Lovett, study co-author and post-doctoral researcher with the Davis College of Agriculture, Natural Resources and Design. “The bioactive compounds may manipulate the insect to stay awake and continue to transmit the pathogen for longer.”The authors of the study compared the effects of the fungus to a “B-horror movie.” Massospora spores gnaw away at a cicada’s genitals, butt and abdomen, replacing them with fungal spores. Then, Lovett says they “wear away like an eraser on a pencil.”Lovett also compared the transmission of the behavior-modifying virus to rabies. He says both rabies and entomopathogenic fungi enlist their living hosts for successful “active host transmission.”“When you're infected with rabies, you become aggressive, you become afraid of water and you don't swallow,” Lovett said. “The virus is passed through saliva and all of those symptoms essentially turn you into a rabies-spreading machine where you're more likely to bite people."In that sense, Lovett says many of us are familiar with active host transmission.“Since we are also animals like insects, we like to think we have complete control over our decisions and we take our freewill for granted,” he said. “But when these pathogens infect cicadas, it's very clear that the pathogen is pulling the behavioral levers of the cicada to cause it to do things which are not in the interest of the cicada but is very much in the interest of the pathogen.”Researchers say cicada nymphs could encounter Massospora in their 17th year as they emerge from the ground to molt into adults or on their way down to feed on roots for 17 years.“The fungus could more or less lay in wait inside its host for the next 17 years until something awakens it, perhaps a hormone cue, where it possibly lays dormant and asymptomatic in its cicada host,” said co-author Matthew Kasson.As grotesque as an infected decaying cicada sounds, researchers say they’re generally harmless to humans. They also reproduce at such a rate that the fungi’s extermination of hordes of cicadas has little effect on their overall population.“They're very docile,” Lovett said. “You can walk right up to one, pick it up to see if it has the fungus (a white to yellowish plug on its back end) and set it back down. They’re not a major pest in any way. They’re just a really interesting quirky insect that’s developed a bizarre lifestyle." 3172

More than 100 law enforcement agencies have withdrawn from helping the Milwaukee Police Department at the Democratic National Convention, three weeks before the big event. According to the police chief, the agencies cited concerns over potential new policies related to crowd control.The Milwaukee Police Department requested the help of more than 1,000 officers from other law enforcement departments for security at the Democratic National Convention. Even though the event will be scaled-down at the Wisconsin Center due to the COVID-19 pandemic, losing many of these officers will make things more complex for Milwaukee police.Chief Alfonso Morales now has to deal with a new task with only three weeks until the DNC.He could not reveal the number of officers he’s lost for security reasons but says the reason agencies pulled out of the convention has to do with the Fire and Police Commission directives given to him last week related to crowd control. Specifically, they’re concerned over the directive to discontinue the use of tear gas and large amounts of pepper spray.“When you rule an unlawful assembly to help break up that crowd, once we deem them unruly, that’s a safe manner in doing so. Not having those tools increases the potential for more violence,” Morales said. “That’s a big concern for the law enforcement community within Milwaukee and outside of Milwaukee.”This is how the departments in West Allis, Fond du Lac and Franklin feel. They’re just three of the local agencies that withdrew. Altogether, they were going to send 30 officers.here does the police department go from here? Morales said he’s concerned if they’ll have enough law enforcement to protect Milwaukee and visitors at the DNC. He doesn’t reject getting help from the National Guard or federal government.“Those will be options and those options are still at the table,” Morales said. 1885

Mobs of kangaroos have been raiding patches of grass in the Australian capital Canberra, driven to the city's sports fields, back yards and roadsides by food scarcity.Canberra residents have taken to social media with images of the jumping marsupials exploring outside their usual habitats. But beyond the cute photo opportunities, the hungry kangaroos are at risk of dying on the roads as their feeding times coincide with rush hour.Canberra has more than 30 nature reserves, with most hosting hundreds of Eastern Grey Kangaroos, and it is not unusual to see them in the reserves or in roads or yards nearby, Australian Capital Territory (ACT) Parks and Conservation Service Director Daniel Iglesias told CNN.But he said this winter the animals were far more visible."Canberra is experiencing a perfect storm of hardship for its kangaroos. New records have been set in Canberra for very cold, frosty nights this winter. This, coupled with very dry conditions with very little rain at all in June and July, means there is very little food for kangaroos, " Iglesias said, via email."Sports ovals, suburban yards, schoolyards and roadsides are the few places offering any green grass at all in Canberra at the moment and they act as magnets for kangaroos," he said.Driving in areas with large populations of kangaroos is ill-advised during the animals' dawn and dusk feeding times as they can jump in front of moving vehicles without warning. Many larger cars in country areas have "roo bars" on the front of the vehicle, to act as a breaker for those in the car, should a collision with a rogue kangaroo take place.Kangaroos are social animals and live in large groups known as "mobs," often headed by a dominant male."Get to know where your local mob hangs out and avoid them, or slow down, especially during peak movement periods of dusk and dawn," Iglesias said. 1872

Music legend Gloria Estefan and her family are headed to the red table for some honest talk.“Red Table Talk: The Estefans” launches Wednesday at noon ET on Facebook Watch. The show will feature Estefan, her daughter Emily and niece Lili. 245

More than 12 million people in the U.S have contracted the coronavirus since the start of the pandemic.The nation's total number of confirmed cases reached 12.01 million on Saturday, six days after the number had reached 11 million, according to a tally by Johns Hopkins University.Daily numbers of new U.S. cases are approaching 200,000, less than three weeks after hitting 100,000 for the first time. The record of 195,542 new cases on Friday was the latest of several recent daily highs.Death rates are getting closer to the dire numbers seen in the spring. The U.S. daily death toll exceeded 2,000 on Thursday, the first time since early May. On Friday, 1,878 deaths were reported.The U.S. leads the world with more than 255,000 dead. 746

来源：资阳报