West Nile Virus
West Nile virus is a potentially serious illness. Experts believe it is established as a seasonal epidemic in North America that flares up in the summer and continues into the fall. About one in 150 people infected with West Nile virus will develop severe illness. The severe symptoms can include high fever, headache, neck stiffness, stupor, disorientation, coma, tremors, convulsions, muscle weakness, vision loss, numbness and paralysis. These symptoms may last several weeks, and neurological effects may be permanent. Up to 20% of the people who become infected have symptoms such as fever, headache, body aches, nausea, vomiting, and sometimes swollen lymph glands or a skin rash on the chest, stomach and back. Symptoms can last for as short as a few days, though even healthy people have become sick for several weeks. Approximately 80% of people who are infected with West Nile virus will not show any symptoms at all.
West Nile Virus
West Nile virus Encephalitis is a mosquito-borne viral disease, which can cause an inflammation of the brain and can be a serious, even fatal, illness.
Knowing the environmental and human-related variables that characterize the favorable areas for the incidence of the West Nile virus, a flavivirus that is transmitted from birds to humans by mosquitoes, is essential to identify those places in Europe at high risk of experiencing outbreaks, even before these are registered, thus enabling preventive measures to be taken.
A new study has detailed how some of the genes in the human genome inherited from Neanderthals appear to confer a protective effect against severe COVID-19.
Researchers have found a 96% similarity in nucleotide sequence between bat coronavirus (RaTG13), isolated from Rhinolophus affinis bats in China in 2013, and SARS-CoV-2 and ~97% amino acid similarity with the Spike (S) protein. This S protein performs two essential roles, i.e., mediates receptor-binding and membrane fusion. Hence, spike protein is regarded as a key coronavirus determinant of host tropism.
Researchers at the Beijing Computational Science Research Center and Peking University analyzed sequences of the angiotensin-converting enzyme 2 (ACE2) proteins from 16 mammals and predicted the structures of ACE2- receptor-binding domain (RBD) complexes.
Many patients with COVID-19 have shown neurological complications, leading to scientific interest in the role played by its causative pathogen, SARS-CoV-2, in brain inflammation. A new study has described the absence of neuroinflammation in cerebrospinal fluid (CSF).
In a new study published in the Journal of Medical Entomology, researchers at the University of Maryland (UMD) found higher rates of West Nile virus-infected mosquitoes in lower-income neighborhoods in urban areas of Baltimore, Maryland.
In Baltimore, Maryland, people living in low-income urban neighborhoods are more at risk of contracting West Nile virus, a mosquito-borne disease, than people living in more affluent neighborhoods. So reports a new study published in the Journal of Medical Entomology.
Flaviviruses -- a group of viruses transmitted by ticks or mosquitoes -- infect an estimated 400 million people annually with diseases like yellow fever, Dengue fever, West Nile virus, and, most recently, Zika virus.
The raccoon, raccoon dog, mink, and golden jackal are not native to Germany or Europe but are increasingly spreading in these non-native regions.
Two University of New Mexico researchers postulate certain specific biomarkers' relevance in predicting the potential for progression to severe COVID-19 in a paper published on the preprint server bioRxiv*
As the COVID-19 pandemic continues to spread, new and unusual chronic sequelae of the disease are cropping up in many medical practices. Now, a new case paper published in The Lancet in September 2020 describes a case of new-onset Parkinson's disease following infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).
West Nile virus spreads most efficiently in the US at temperatures between 24-25 degrees Celsius (75.2-77 degrees Fahrenheit), a new study published today in eLife shows.
The age-related increase in the risk of severe disease and death from COVID-19 mirrors earlier patterns seen with infections. Such trends may help understand the mechanisms underlying the clinical feature. A recent study published in the preprint server medRxiv* in August 2020 shows the effect of age and sex on COVID-19 hospitalization rates in the USA and helps understand how immune function is involved in this pandemic.
Humans are not the only social animal struggling with new infectious diseases. When Hamilton College Associate Professor of Biology Andrea Townsend began studying the social behavior of American crows, her work was complicated by West Nile virus, an emerging disease with devastating effects on crow populations.
Over the last few years, there has been a rise in the number of cases of diseases caused by mosquito and tick bites. The U.S. Centers for Disease Control and Prevention (CDC) has said that a natural chemical compound could help combat this problem. This compound Nootkatone is found commonly in cedar trees, and grapefruit skin says the organization.
The coronavirus pandemic, which has now infected nearly 19 million and killed more than 712,000 people, most likely originated from bats. Just like other coronavirus outbreaks in the past, a spill-over event or zoonosis caused the viruses to jump from animals to humans.
As if the novel coronavirus pandemic was not enough! Now the United States Centre for Disease Control and Prevention (CDC) warns parents and pediatricians to be on the watch for a rare condition called Acute Flaccid Myelitis or AFM for short, which could affect young children and cause unexplained muscle paralysis similar to poliomyelitis. Their report is published today in the Morbidity and Mortality Weekly Report.
As climate change brings hotter weather to Southern California, coastal populations from San Diego to Santa Barbara may face an increased risk of contracting West Nile virus and other mosquito-borne diseases, suggests a new study led by researchers at the University of California, Berkeley.
The U.S. public health system has been starved for decades and lacks the resources necessary to confront the worst health crisis in a century. Read the investigation from KHN and The Associated Press.
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) which is currently at the heart of a pandemic that has cost the world more than 550,000 lives, 12 million infections, and uncounted years of productivity, is an RNA virus with the largest genome among all such viruses. This 30 kb size virus has caused many difficulties for scientists in search of a vaccine.