Articles tagged with Cholera
A recent study has traced the source of the current cholera pandemic to an ancestor that first appeared in the Bay of Bengal 40 years ago. The analysis reveals that the bacterium's genetic region SXT acquired around 1982, triggering global transmission from this original source.
A team of researchers from Northern Arizona University and the Translational Genomics Research Institute has pinpointed the source of a devastating cholera outbreak in Haiti that killed over 6,000 people. The study used whole genome sequencing to confirm that Nepalese peacekeepers brought the disease to Haiti.
A new computational model developed by researchers at Ohio State University can forecast where cholera outbreaks are likely to occur in Haiti. The model takes into account various factors, including environmental conditions and human contact, to identify typical patterns of cholera outbreaks and hotspots where control efforts are needed.
A new study finds that large river discharges carrying nutrients contribute to increased phytoplankton blooms, which in turn lead to cholera outbreaks. The research analyzed data from four major river basins and suggests that predicting global warming's impact on cholera will be more complicated than initially thought.
The study's findings suggest that mass vaccinations deployed strategically could prevent future cholera epidemics in Zimbabwe and other nations. The research team analyzed how cultural, political, and economic factors influenced routes of transmission and identified funeral feasts as a key factor contributing to the spread of the disease.
A recent study published in the American Journal of Tropical Medicine and Hygiene found that increases in rain and temperature can predict cholera outbreaks months ahead. A mere 1°C increase in average monthly minimum temperature doubles the number of cholera cases within four months.
A coalition of researchers and policymakers argue that a universal vaccination campaign is essential to ending the crisis. The authors recommend increasing vaccine availability through advance purchase commitments and scaling up efforts to prevent similar shortages during future outbreaks.
Researchers found that vaccinating 50-70% of people in high-risk areas after the outbreak would reduce morbidity and mortality by roughly 50%. A mobile stockpile of oral cholera vaccine could be deployed to mitigate future epidemics, especially in developing countries with poor sanitation infrastructure.
A new study predicts nearly 800,000 cases and 11,100 deaths in Haiti due to cholera, significantly underestimating official projections. Combining available disease control strategies such as clean water access, oral vaccination, and expanded antibiotic use could prevent thousands of deaths.
A mathematical model based on current knowledge of the disease predicts that without intervention, 779,000 new cases and 11,000 deaths would result from the epidemic. The model also simulates the effects of increased access to clean water, vaccination, and antibiotic treatment, which could prevent up to 170,000 cases and 3,400 deaths.
A new UCSF study forecasts a far worse-than-expected cholera epidemic in Haiti, predicting nearly twice the number of cases as the United Nations' initial projections. The study suggests that extending access to antibiotics could save thousands of lives and prevent widespread fatalities.
A new study predicts the spread of cholera in Haiti and identifies effective control strategies. The researchers' model suggests a three percent risk reduction in infection through vaccination, which is twice the impact of providing clean water.
Scientists have developed a key advance toward a fast, simple test to detect the toxin that causes cholera. The new method uses specially prepared nanoparticles coated with dextran to bind to specific characteristics of the cholera toxin receptor, allowing for easy detection.
Researchers found that vaccination can provide approximately 76% protective efficacy against cholera, and modeling suggests delayed responses can still have a benefit. The use of oral cholera vaccines during outbreaks is being reevaluated due to the changing nature of Vibrio cholerae.
A U of Alberta researcher is working towards developing a pharmacological target for cholera by understanding the bacteria's mechanism of infection and survival. He has discovered how Vibrio cholerae uses molecular nano-syringes to infect host cells, providing a potential vaccine target.
Researchers at the University of Central Florida have developed a technique to detect cholera toxin using a complex sugar and nanoparticles. The method could provide faster and less expensive results than current detection methods, enabling relief workers to restrict access to contaminated sources.
The study reveals that the bacteria causing the current Haitian cholera epidemic originated in South Asia, supporting the notion of transmission from an infected individual. The strain was found to be more virulent than average, with a higher potential for severe diarrhea and increased mortality rates.
Researchers identified a new protein (vopE) involved in causing diarrhea and found that the bacteria requires T3SS to cause disease. The study reveals a second pathogenic mechanism used by non-O1, non-O139 strains of Vibrio cholerae.
The study provides the first whole genome sequence analysis of the Haitian Vibrio cholerae outbreak strain, confirming a South Asian lineage. This understanding has important public health policy implications for preventing future cholera outbreaks.
A recent study found that the cholera strain in Haiti matches bacterial samples from South Asia, contradicting earlier assumptions of its Latin American origin. The researchers believe the strain was introduced into Haiti through human activity, raising hopes for control measures such as vaccination and rapid screening.
Experts recommend stocking up on cholera vaccines to rapidly deploy to high-risk areas, complementing treatment efforts in Haiti. A ready supply could limit the impact of an outbreak and promote humanitarian benefits.
A group of experts recommends creating an emergency stockpile of cholera vaccines to rapidly deploy in high-risk areas, stabilizing countries and preventing outbreaks. The US would face low costs, while the benefits could be enormous, particularly in refugee camps.
Researchers have identified a potential new drug combination for treating diffuse large B cell lymphoma and found potential therapeutic targets for Noonan syndrome. The combination of an inhibitor of BCL6 with either an HDAC protein or Hsp90 protein showed enhanced killing of cancer cells in vitro and potent suppression of tumor growth...
A five-year study in Bangladesh found that women's use of sari cloth to filter household water reduced cholera incidence by 48% in their own households. Neighboring households not filtering water also saw a lower incidence of disease, highlighting the indirect benefit of the practice.
Researchers at Dartmouth College have discovered a protein structure controlling Vibrio cholerae's virulent nature. A fatty acid found within the protein appears to inhibit its function, preventing the bacteria from causing life-threatening diarrhea.
A University of Central Florida researcher has created a low-cost vaccine against two deadly diseases, malaria and cholera, offering long-lasting immunity to mice. The breakthrough uses genetically engineered plants to produce the vaccine, which could be produced in large quantities at a fraction of the cost of traditional methods.
Scientists from Tufts University have proposed a link between cholera outbreaks and fluctuating water levels in the region's three principal rivers. The researchers found two distinctive epidemic patterns associated with seasonal cycles of low river flows and floods.
A cheap, locally produced oral cholera vaccine has been proven safe and effective in preventing clinically significant cholera cases in young children and older individuals. The vaccine demonstrated nearly 70% protection against cholera for at least 2 years after vaccination.
Research found that parasitic infection reduces immunity to future cholera infections and compromises vaccine effectiveness. Helminth-infected patients had lower IgA antibodies, indicating a weakened immune system.
Researchers found that midges prefer ponds with high polarization levels, which may be related to nutrient content. This discovery could help control midge numbers and minimize cholera transmission by offering alternative, polarized light-reflecting water sources.
Researchers at the University of Michigan found that mild infections play a key role in understanding and controlling cholera outbreaks. The study suggests that individuals with mild infections lose their immunity quickly, leading to a cyclical pattern of illness and recovery.
The International Red Cross has adopted a cholera prevention program developed by Hebrew University students, which was effective in preventing and managing the disease in displaced persons camps. The program aims to increase safe drinking water sources, promote awareness, and improve surveillance and reporting of cholera cases.
Researchers discovered Vibrio cholerae interacts with chitin in aquatic environments, influencing survival, spread, and human infection. This knowledge can inform risk assessments and develop new responses to combat pathogens.
Cholera outbreaks can be predicted using satellite sensors, monitoring sea surface temperature and height. This technology offers a pre-emptive approach to addressing epidemics in developing countries affected by climate change.
A new study found that young children in impoverished regions are disproportionately affected by cholera. The study, published in PLOS Neglected Tropical Diseases, reveals the African site had the highest incidence of cholera, with vaccination and improved water supply considered immediate strategies.
According to data analysis, ships launched from the port side tend to have more male passengers and crew members, whereas the starboard side is predominantly female and child-heavy. This pattern is attributed to historical social norms and order maintenance on vessels.
Researchers found that vaccinating half of a population can reduce cholera cases by 89% in unvaccinated individuals and 93% overall. Mass vaccination is a viable strategy to control endemic cholera outbreaks.
Researchers suggest that internationally licensed, killed whole-cell cholera vaccines may be highly effective in controlling endemic cholera when given via mass immunization. Vaccinating just 30% of the population every two years could achieve a 76% overall reduction rate.
Researchers at Princeton University have discovered a chemical mechanism used by cholera bacteria to communicate with each other, which can be disrupted to potentially halt the disease's progress.
A new study published in The Lancet has shown that urban sanitation is a highly effective health measure in reducing cholera and diarrhoeal diseases in developing countries. The research found that city-wide sanitation programs can reduce the prevalence of diarrhoea by up to 43% in high-risk areas.
Research finds strong correlation between cholera outbreaks and climate changes, including rainfall and Indian Oscillation Index. The study provides basis for early warning system and prevention measures.
A mathematical model of disease cycles developed at the University of Michigan shows promise for predicting cholera outbreaks. The model used El Nino-Southern Oscillation (ENSO) climate variability data to improve prediction accuracy, particularly in recent decades.
Researchers have discovered a factor that enables V. cholerae bacteria to attach to intestinal cells, leading to colonization and disease. A new therapy approach is being developed based on this finding, which could improve vaccine efficacy.
Researchers developed a new cholera modeling approach that better explains past epidemics, suggesting human-to-human transmission is crucial for outbreak dynamics. The model incorporates the hyperinfectious state of the bacteria, which becomes more infectious when passing through a human host.
A new single-dose ciprofloxacin treatment has been shown to be effective in treating childhood cholera, with 60% of cases cured within 48 hours. However, the new treatment is less effective at eradicating the cholera bacteria from stool compared to a 12-dose course of erythromycin.
A new study reveals that adult non-biting midges serve as vectors for the spread of cholera. The researchers found that these insects can carry and transmit the bacteria across continents through wind currents, air travel, and human migration.
The USGS warns that avian cholera could spread from the Great Salt Lake as eared grebes migrate to wintering areas, where they congregate in dense groups. The disease is highly contagious among bird species and can sweep through wetlands quickly, killing thousands of birds in a single outbreak.
Researchers solved the atomic structure of pilin proteins in Pseudomonas aeruginosa and Vibrio cholerae, essential for bacterial movement and infection. This knowledge provides crucial insights for developing novel antibiotics and vaccines against these deadly diseases.
A study by Pascual and coworkers reveals that climate variability from ENSO influences cholera cycles, with a stronger link during warm events. Understanding this connection is crucial as ENSO predictions suggest a potential increase in disease variability under global warming.
A new study has identified azithromycin as an effective single-dose antibiotic treatment for children with cholera, reducing diarrhoea duration by 24 hours compared to erythromycin. However, the high cost of azithromycin may limit its widespread adoption in treating childhood cholera.
A new study reveals that climate change has strengthened the connection between El Nino-Southern Oscillation (ENSO) and cholera cycles, leading to increased disease outbreaks in warmer years. The researchers found that ENSO events trigger cholera increases after warm events and decreases after cold events.
Scientists at University at Buffalo used chitinase to identify the extracellular transport signal of cholera toxin, a crucial step in understanding how bacteria cause disease. The researchers found that only a portion of a specific region of the protein was essential for its secretion.
Researchers explore how ecological principles, such as the dilution effect, predict the movement of parasites and diseases in various ecosystems. Studies examine the impact of animal diversity on disease transmission, with findings highlighting the importance of community diversity in preventing the spread of infectious diseases.
A new mathematical model links El Niño cycles to cholera outbreaks, with a consistent 3.7-year frequency in both ENSO events and cholera cases. The study suggests an 11-month time lag between ENSO events and peak cholera incidence, likely due to increased sea-surface temperatures and bacteria-bearing zooplankton.
The study provides a comprehensive understanding of Vibrio cholerae's genetic makeup, shedding light on its role in disease and survival. The DNA sequence reveals two circular chromosomes, each essential for the organism's viability, and may hold clues to developing new vaccine candidates and diagnostic tools.
A new oral vaccine approach is being developed to protect pancreatic cells and prevent the autoimmune disease type I diabetes. Early trials have shown promising results using a combination of insulin and cholera toxin.
Researchers found that the cholera pathogen acquired its deadly factors by picking up genes from a virus, CTX phage. The virus instructs the bacterium to introduce the cholera toxin gene, allowing it to become a pathogen.