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Scientists Have Warned The Public To Be Alert To The Spread Of Four Viruses
- Jul 18, 2018 -

Some imperceptible viruses are spread through traveling populations and can easily become a common problem. Four viruses are of particular concern, according to a recent article in scientific American. Although virologists and epidemiologists do not know which viruses might be the next zika, they offer reasons to be wary of them.

mayaro

At the university of Texas medical branch in Galveston, virologists Scott weaver said: "more than a decade, I've been thinking about mayaro, it can be achieved by aedes aegypti, spread among the crowd."

Mayaro is a clinically and chikungunya is difficult to distinguish between virus, can cause fever, chills, rash and sustainable unique pain more than a year, more important is that the virus can also in the human body circulation. Although there are no vaccines or drugs for mayaro or chikungunya fever, they may be virus-specific once they appear.

These similarities with chikungunya disease are the reason why mayaro may be widespread. Both viruses were originally transmitted by mosquitoes in the forest, for example in areas such as the amazon river. However, the disease is highly adaptable and has been transmitted by aedes aegypti and aedes albopictus, resulting in 100,000 confirmed cases in the United States alone in September 2016.

Mayaro may have the same adaptability. In the laboratory, aedes aegypti and aedes albopictus have been used as potential vectors in the Maya. More importantly, there have been cases in recent years in some Brazilian megacities far from the forest. The emergence of the virus in Haiti in September 2016 further demonstrated the possibility of the virus adapting to urban areas. Weaver said it could be the virus or a variant that is better adapted to urban transmission.

Rift valley fever

For most people, RVF infections are simple diseases like fever and chills. In some people, however, it can develop into a hemorrhagic disease with symptoms such as abnormal bleeding or inflammation of the brain. Half of cases of rift valley bleeding are fatal and there is no treatment.

The rift valley virus has been confined to Africa since its discovery in Kenya in the early 20th century. But the virus left Africa in 2000 and spread to the Arabian peninsula. By 2014, a massive outbreak of the virus had killed tens of thousands of human cases and millions of livestock. In recent years, more and more people have died from hemorrhagic disease.

Brian Byrd, a virologist at the university of California, Davis school of veterinary medicine's health institute, said it was not known whether the virus was mutating into a more deadly form.

One big problem with RVF is that the virus can be transmitted by more than 30 species of mosquitoes, 19 of which are native to North America. Both wild and domestic animals may be infected with the virus.

Bode says if the virus reaches North America and Africa, it will have a profound impact on animal health and the economy. RVF may be transmitted to the United States by mosquitoes carrying the virus on airplanes or ships. Fortunately, the development of vaccines has been advanced.

Haemorrhagic fever,

Crimean - Congo haemorrhagic fever is spread by ticks. That seems like good news, because tick infections can spread more slowly than mosquitoes. The bad news is that the Crimean - Congo virus has a fatality rate of 40 percent. The virus was confirmed to have spread from Africa to China in 1944.

In recent years, the spread of the virus appears to be accelerating: in 2002, it spread to Turkey, where it infected more than 10,000 people by 2015. In 2012, the virus spread to India. In September, Spain discovered two cases of viral fever that killed one person. Bird found it difficult to determine whether it was a one-off introduction or a variant adapted to the European environment.

In addition to bleeding almost everywhere in the body, the infection can also lead to skin rashes and fever and other symptoms. Currently, the antiviral drug ribavirin has been used to treat diseases caused by Crimean - Congo virus, but the effect is not very obvious.

WuSu figure

"The unusually hot summer in Europe has led to an outbreak of the virus in German birds that has killed large Numbers of birds. Similar cases have also been reported in France, Belgium, Hungary and the Netherlands. Before that, the city was confined to certain areas. "Said Daniel keidar, a virologist at the institute of tropical medicine in benhanoit, Germany.

Ursutu is a common culex virus that causes diseases like west Nile fever: headaches, fever and neurological problems. But so far, most of the deaths from the infection have been asymptomatic. According to a study published in the September issue of the journal clinical microbiology and infectious diseases, more than 6 percent of italians living near modena have recently been infected with the virus unconsciously. In 2013 Croatia reported that although there were only three cases, people with weakened immunity were most likely to develop severe symptoms.

"We cannot underestimate this infection." Weaver warned that the discovery of the virus was not far from the area where west Nile fever broke out 20 years ago. At the time, west Nile fever was a minor outbreak in eastern Europe and was not considered a serious pathogenic pathogen. "Ursutu is an avian influenza virus that, like west Nile, can spread easily in many parts of the world. At the same time, climate change means more birds are likely to be infected, and humans are more likely to be infected with the virus.


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