Articles tagged with Viral Infections
A study found that 92% of ear infection cases were caused by bacteria, while 70% were caused by viruses. Viruses can impair antibiotic efficacy, leading to partial effectiveness in treating AOM.
Researchers found that mice with a genetic predisposition to severe flu symptoms mount an enhanced immune response in the lungs compared to those with milder disease. The study aims to identify genes controlling inflammation variation during influenza infection and may help determine who would benefit most from limited vaccine supply.
The H5N1 avian influenza has been detected in 55 countries, but critical information about wild birds is often recorded inaccurately or not at all. This lack of data can lead to unwarranted assumptions and conclusions that affect public perceptions and resource allocation.
A new H5N1 variant, Fujian-like (FL), has emerged in China and spread to other countries, causing increased poultry infections and recent human cases. The study suggests that the vaccination program may have facilitated FL's emergence, highlighting inadequate control measures.
Researchers have reconstructed the DNA sequence of a 5-million-year-old retrovirus called Phoenix, which is able to produce infectious particles. The Phoenix retrovirus is an ancestor of a large family of mobile DNA elements that may play a role in cancer.
A novel combination therapy has been developed to prevent three common viruses – cytomegalovirus, Epstein-Barr virus, and adenovirus – in transplant patients. The treatment, called Trivirus-specific cytotoxic T lymphocytes (CTLs), proved effective and safe in a phase 1 trial, reducing the risk of death from these infections.
Researchers found common wood ducks and laughing gulls susceptible to H5N1 avian influenza viruses, shedding most of the virus through their respiratory tract. The study provides valuable insights into detecting the disease in live birds by swabbing their mouths and throats.
For most children with middle ear infection, an observation policy is justified due to limited benefits from antibiotics. The study found that only some children under the age of two benefit from antibiotic treatment, while others may require more treatments to prevent extended disease cases.
Researchers at UTMB have developed an antioxidant treatment that reduces oxidative stress and inflammation caused by RSV, a common and dangerous early-childhood infection. The treatment, tested on laboratory mice, also lowers asthma-like symptoms after the virus has been cleared.
Researchers discovered that West Nile virus blocks immune signaling by a protein receptor, allowing it to replicate and spread. The African strain does not block this activity, making it harmless to the immune system. Harnessing this strain could lead to vaccine development against North American strains.
OHSU researchers show that CD8+ T-cells can literally eat virus-infected cells, providing insight into the human immune system and potential new way to gauge vaccine effectiveness. The discovery may help determine vaccine efficacy by measuring T-cell response to and consumption of a candidate vaccine.
A population-based surveillance study found that treatment with Tamiflu (oseltamivir) significantly reduced mortality from seasonal influenza in severely ill adults. The study, conducted in Ontario, Canada, showed a 71% reduction in death from influenza among treated patients.
Researchers found that adults infected with rhinovirus, the cause of half of all colds, can contaminate hotel room objects, leaving an infectious gift for others. The study, conducted in hotel rooms, shows that viruses can survive on surfaces for at least a day.
A comprehensive mouse study provides new clues about the virulence of the 1918 influenza virus. The research found that a hyperactive immune response triggered by the virus may contribute to its exceptional lethality. Understanding this phenomenon is crucial for developing therapies against future flu pandemics.
A study published in Nature found that the reconstructed 1918 influenza virus induces a potent immune system response in mice, yet fails to prevent severe lung disease and death. Researchers hope to understand the trajectory of this infection and develop targeted therapies for other viral infections.
A new study by UW researchers suggests that the 1918 flu pandemic was deadly due to a severe immune system response, contradicting the conventional wisdom of secondary infections. The study found activated genes related to immune responses and programmed cell death, indicating an overzealous host immune system.
A transfusion-free surgical program for Jehovah's Witness patients undergoing liver transplantation has significantly reduced the overall use of blood products for non-Jehovah's Witnesses. The program's implementation led to lower mean number of intraoperative PRBC and FFP transfusions, as well as decreased procedure cost.
Scientists have made a groundbreaking discovery on how the body's T cells react to parasitic diseases. The study found that T cells focus on specific peptides in response to infection, including Chagas Disease caused by Trypanosoma cruzi. This new understanding may lead to improved vaccine development for all parasitic diseases.
A study of 49 patients diagnosed with West Nile fever found that half experienced ongoing health complaints, including fatigue, memory problems, and depression, similar to those who had more severe forms of the disease. The research suggests that West Nile virus may cause a spectrum of illness and damage to the brain.
Purdue University researchers identified a precise location where an antibody binds to the West Nile virus and proposed a theory for its neutralization mechanism. The study suggests that this antibody works by blocking the positional changes needed for the E protein before fusion, preventing infection.
Scientists replicated HCV in mouse cells using a gene called protein kinase R, blocking the virus's high rate of replication. This breakthrough may lead to better understanding of why some patients respond to treatment, potentially shedding light on new therapeutic strategies.
Researchers are investigating antioxidants for preventing or treating rickettsia bacteria, a deadly tick-borne illness. The study, funded by the National Institute of Allergy and Infectious Disease, aims to identify novel therapeutic targets for rickettsial diseases.
Scientists identified a genetic element that the dengue virus uses to replicate, triggering the potentially fatal illness known as dengue hemorrhagic fever. The discovery provides a model for RNA replication in flaviviruses, which cause millions of cases of human illness each year.
A study found that HPV16 and 18 variants persist longer in people whose ancestors are from the same geographical area as the virus. The research suggests that genetic variants specific to racial groups may play a role in persistence. Future studies should examine possible mechanisms behind variant-specific immune evasion.
Researchers at Harvard Medical School have created a new mouse model that allows scientists to study how the immune system responds to Chlamydia. The breakthrough enables tracking of T cell responses in reproductive tissues, shedding light on potential avenues for developing vaccines against this common STD.
Researchers have identified a possible mechanism used by an important motor protein that enables bacteria to travel through the bloodstream and infect organs such as the heart. The discovery may lead to the development of new pharmacological therapies that can target and kill bacteria, preventing or minimizing damage to the heart muscle.
Researchers have discovered a potent inhibitor of HPV infection in the compound carrageenan, found in sexual lubricants and baby food. The study suggests that carrageenan could be effective in preventing HPV-related genital disease, complementing existing vaccines and treatments.
Two medical researchers, Chen Ding-Shinn and Rao Zihe, have made significant contributions to understanding infectious diseases and developing a comprehensive vaccination campaign. Mathematicians Jacob Palis and C.S. Seshadri are recognized for their groundbreaking work in dynamic systems and algebraic geometry, respectively.
Researchers at MSU have developed a new cell line that can grow nearly all types of flu viruses, potentially leading to faster and cheaper vaccine production. This could help address the issues with traditional influenza vaccine production methods, including long production times and limited supply.
A biomarker named procalcitonin can reduce the length of antibiotic treatment for community-acquired pneumonia (CAP) patients. Studies found that lower procalcitonin levels could shorten antibiotic use by an average of seven days, but guidelines suggest shorter courses and caution against over-reliance on this marker.
A new study by veterinary researchers at Oregon State University has linked vesivirus to a major epidemic of abortion in Kentucky Thoroughbred mares. The findings suggest that broodmares are being commonly exposed to vesivirus from unknown sources, and that exposure to such horses might be a concern for pregnant women.
A study by Ohio State University researchers found that mice lacking a specific gene produce fewer parasites in their livers, preventing the disease from developing. This discovery may lead to the creation of new drugs to treat different diseases affecting the liver.
A new H5N1 vaccine has demonstrated cross-protection in ferrets against different variants of the virus, offering a promising solution for stockpiling in the event of a human outbreak. The vaccine was shown to completely protect ferrets from infection and reduce viral multiplication.
Researchers found SIVcpz infection in up to 35% of chimpanzees in West Africa, allowing for genetic comparisons between HIV-1 and its simian counterpart. The study provides insights into the origins of HIV-1 and how it made the jump from animals to humans.
Infected pet rodents can transmit lymphocytic choriomeningitis virus (LCMV) to humans through organ transplants. The virus, a member of the Arenaviridae family, has been linked to severe disease in immuno-suppressed patients.
The hepatitis C virus uses its protease activity to destroy a key antiviral signaling protein called MAVS, preventing infected cells from producing type 1 interferon. This allows the virus to evade the immune system and persist indefinitely, highlighting potential new treatment strategies.
Researchers identified 37 HIV-1 protein fragments that triggered an immune response in cytotoxic T lymphocytes. Healthy donors responded with large quantities of interferon gamma, while infected patients showed only a small proportion of cells mounting an adequate response.
A new study offers a simpler approach to diagnosing urinary incontinence in women by asking patients three simple questions. Meanwhile, an update to the US hepatitis C profile reveals that infected individuals are entering their 40s and 50s, increasing the risk of disease consequences such as cirrhosis and liver cancer.
A $4.5 million partnership aims to improve lung health by studying immune responses to infections and allergens in Canadians affected by asthma, cystic fibrosis, and other respiratory diseases. Experts available for comment on the initiative and its implications.
Researchers identify key factors that contribute to the amplification and transmission of West Nile Virus, including drought-induced conditions and specific mosquito species. By understanding these local conditions, control strategies can be devised to prevent the spread of the disease.
Researchers found that T cells responding to Epstein-Barr virus-encoded nuclear antigen1 (EBNA1) are hyper-reactive and produce interferon-gamma, which shapes immune responses. This hyper-reactivity may trigger the destruction of myelin sheathing in nerve cells, leading to MS.
Researchers used mathematical modeling to simulate worldwide outbreaks and concluded that restrictions on air travel would achieve very little in controlling the spread of a new flu virus. Local measures such as vaccines and antiviral drugs could be more effective in controlling the spread of the virus.
Researchers discovered erythrovirus genome persistence in human tissues, which is ubiquitous and life-long. The Bioportfolio provides a novel database for analyzing microbial species and their variants, offering potential long-term permanence for gene therapy vectors.
Researchers have developed a vaccine that prevents haemorrhagic fever developing in monkeys infected with the deadly Marburg virus. The vaccine was found to be highly effective as a post-exposure treatment, with all treated monkeys surviving for at least 80 days.
A post-exposure vaccine has been shown to protect monkeys against the deadly Marburg virus. Researchers tested the vaccine in a study involving non-human primates and found it to be highly effective in preventing severe symptoms of the disease.
A new experimental vaccine has been shown to protect nonhuman primates against Marburg virus infection, even when administered after exposure. The study found that all treated monkeys survived for at least 80 days, while controls succumbed to the disease within 12 days.
A viral protein called p12 activates infected T cells and causes them to become sticky, adhering to other T cells. This enhanced adherence is due to clustering of special proteins on the surface of T cells.
Scientists have developed a new method using molecular beacons to visualize and detect the genome of the respiratory virus in live cells. This technique allows for early detection of the virus, which is essential for treating the disease.
A team of scientists has discovered a new hantavirus in an African wood mouse, which is related to viruses causing severe disease in humans in Central and Eastern Europe. The virus was found to have similarities with other hantaviruses, including the Dobrava virus, and can infect humans, according to preliminary evidence.
A study found that Japanese encephalitis is prevalent in Bali, particularly among children under 10 years old. The annual incidence rate for this age group was 8.2 per 100,000, resulting in nine deaths and 31 cases of serious neurological disability.
A large-scale model simulates the spread of a pandemic influenza virus in the US population, exploring the impact of interventions such as vaccination and social distancing. The study finds that stockpiling vaccines and implementing a combination of mitigation strategies could be effective in slowing the spread of the flu.
Adult stem cells can make new tendon tissue and repair damaged tendons in rats. The study demonstrates potential for using this technology to treat musculoskeletal injuries and degenerative diseases.
Researchers at Ohio State University have discovered that a cancer virus protein is necessary for the virus to successfully infect and reproduce in the body. The protein, p13, plays a critical role in the early phase of infection, and its function could be targeted by new drugs or vaccines.
The HPV vaccine has the potential to prevent cervical cancer, but understanding its context is vital. Vaccination should not be misconstrued as a green light for permissive behavior, but rather as a means of preventing infection in young women.
Scientists detect novel gammaretrovirus more frequently in men with RNASEL gene mutations, sparking questions about a potential viral cause for prostate cancer. The discovery raises several questions for future experimentation, including the relationship between the virus and the disease.
Researchers found that horse antibodies to H5N1 protected dog kidney cells and mice infected with the deadly virus from death. Low doses of antibody (50µg) protected 70% of mice, while higher doses (100µg) offered full protection.
A study found that Vesivirus antibodies were present in over 40% of patients with clinical hepatitis, suggesting a potential link between the virus and human disease. The research also highlights the widespread distribution of Vesivirus in various animal species, including fish and primates.
A recent study from Thailand found a significant association between bocavirus (HBoV) and lower respiratory tract infections (LRTI) in young children. HBoV was detected in over half of hospitalized patients under one year old, highlighting the need for further research to understand the virus's role in human disease.
The study found that small mutations can change the binding site preference of the avian virus from bird to human receptors, increasing its chances of infection. This critical step is a key reason why most avian influenza viruses are not easily transmitted between humans.
Researchers found that carnivore parvoviruses and the human B19 erythrovirus undergo rapid evolution when switching host species. This contradicts the assumption that DNA viruses exhibit slower mutation rates compared to their hosts and other DNA viruses.