ETIDIOH - NEW

Summary H5Nx viruses remain a threat to human health . Over the past few years, the H5Nx clade 2.3.4.4b has rapidly spread to 6 continents, leading to massive avian and mammalian host deaths . In late March 2024, H5N1 was first identified in lactating dairy cows in the United States and has spread to 16 states, affected hundreds of herds , and caused over 50 known human infections . In this review, we discuss the origins of 2.3.4.4b H5N1 viruses and how they are evolving to better infect mammals, with an emphasis on receptor-binding characteristics . Understanding changes in receptor binding and mutations in the viral genome that allow for sustained spread in mammals can inform public health measures and prevent future influenza virus epidemics and pandemics. (...) Source: PLoS Pathogens,  https://journals.plos.org/plospathogens/article?id=10.1371/journal.ppat.1012847 _____

Abstract Influenza is a major infectious disease challenge affecting animal and human health globally, and wild birds are historically the primary reservoirs of all the known Influenza A virus subtypes. Here, we detected the Highly Pathogenic Avian Influenza (HPAI) virus in exotic and aquatic birds in three different locations in Nigeria. On the 8th of February 2021, exotic birds: Yellow Golden Pheasant (Chrysolophus pictus), Sultan chicken (Gallus gallus domesticus), Lakenvelder chicken (Gallus gallus domesticus), and Common pheasant (Phasianus calchicus), imported from Libya and transported across the Niger Republic border to Nigeria, were presented to the National Veterinary Research Institute, Vom, for screening. Also, a family in Lagos State bought some exotic aquatic birds from a live bird market in Sokoto State , Nigeria, where sudden death was recorded with the birds showing few clinical signs. Similarly, the sudden death of some aquatic birds was reported in Mandela Parks and ...

A 1.4 million egg laying and rearing flock . Increased mortality and other clinical signs were reported. Samples taken tested positive for HPAI H5N1. England, Shropshire Region. Source: WOAH,  https://wahis.woah.org/#/in-review/6209 _____

A 13,316 commercial turkey fattening unit . Increased mortality and other clinical signs were reported. Samples taken and tested positive for HPAI H5N1. England, East Riding of Yorkshire Region. Source: WOAH,  https://wahis.woah.org/#/in-review/6206 _____

A 240 free-range layer unit . Increased mortality and other clinical signs were reported. Samples taken and tested positive for HPAI H5N1. England, East Sussex Region. Source: WOAH,  https://wahis.woah.org/#/in-review/6207 _____

Abstract In a patient on immunosuppressant treatment , SARS-CoV-2 RNA was documented in different extra-respiratory samples over several months in the absence of positive determinations in upper respiratory samples . Whole -genome sequencing of these samples showed the acquisition of different single-nucleotide polymorphisms over time, suggesting viral evolution and thus viral viability. Source: Viruses,  https://www.mdpi.com/1999-4915/17/2/147 _____

Abstract The effectiveness of poultry vaccination in preventing the transmission of highly pathogenic avian influenza viruses (AIVs) has been debated, and its impact on wild birds remains uncertain. Here, we reconstruct the movements of H5 subtype AIV lineages among vaccinated poultry , unvaccinated poultry, and wild birds, worldwide, from 1996 to 2023. We find that there is a time lag in viral transmission among different host populations and that movements from wild birds to unvaccinated poultry were more frequent than those from wild birds to vaccinated poultry . Furthermore, our findings suggest that the HA (hemagglutinin) gene of the AIV lineage that circulated predominately in Chinese poultry experienced greater nonsynonymous divergence and adaptive fixation than other lineages. Our results indicate that the epidemiological, ecological, and evolutionary consequences of widespread AIV vaccination in poultry may be linked in complex ways and that much work is needed to better under...

{Excerpts} (...) The U.S. Department of Health and Human Services (HHS) has issued a gag order to the CDC, FDA and other departments by its acting secretary, informing them to terminate external communications before February 1, except for serious situations related to health and safety . What do the FDA and CDC usually say? Nothing much, nothing that affects people's livelihood. They just send out a press release to tell everyone that a new drug has been approved, or issue new regulations, such as the previous rule that prohibits the use of red dye No. 3 in food. If it hadn't been released before Trump took office, it would not be released now. There is even less content worth reading about the CDC , which only talks about the latest epidemics and how to deal with them, which are obviously not important. How can it be more important than the virtual currency issued by Trump's family? HHS is the Department of Health and Human Services, and releasing information to the publi...

Abstract Infectious disease outbreaks with pandemic potential present challenges for mitigation and control . Policymakers make decisions to reduce disease-associated morbidity and mortality while also minimizing socioeconomic costs of control. Despite ongoing efforts and widespread recognition of the challenge, there remains a paucity of decision tool frameworks that integrate epidemic and macroeconomic dynamics . Here, we propose and analyze an econo-epidemic model to identify robust planning policies to limit epidemic impacts while maintaining economic activity. The model couples epidemic dynamics, behavioral change , economic activity, and feasible policy plans informed by respiratory disease threats of pandemic concern . We compare alternative fixed, dynamic open-loop optimal control, and feedback control policies via a welfare loss framework. We find that open loop policies that adjust employment dynamically while maintaining a flat epidemic curve in advance of the uncertain arri...

 {Excerpt} DOVER, Del. (Jan. 22, 2025) – The Delmarva Avian Influenza Joint Information Center announced today that the Delaware Department of Natural Resources and Environmental Control (DNREC) and the U.S. Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS) Wildlife Services are collaborating to collect sick and deceased snow geese and other wild birds that may have succumbed to the outbreak of avian influenza currently spreading throughout the state .  The expanded statewide collection effort to help track the bird flu is funded through DNREC and the Delaware Department of Agriculture (DDA). Sick or dead wild animals found in Delaware during the avian influenza outbreak or at any time of year, are to be reported to the DNREC Wildlife Section.  Reporting deceased or ill wildlife does not guarantee that DNREC and APHIS Wildlife Services will respond to every report, only that a DNREC or APHIS Wildlife Services representative will assess the rep...

Abstract Given recent outbreaks of Oropouche virus in Latin America and >100 confirmed travel-associated cases in the United States , we evaluated the competence of US vectors , including Aedes albopictus, Culex quinquefasciatus, Culex pipiens , and Anopheles quadrimaculatus mosquitoes . Results with historic and recent isolates suggest transmission potential for those species is low . Source: Emerging Infectious Diseases Journal,  https://wwwnc.cdc.gov/eid/article/31/3/24-1886_article _____

Abstract Senecavirus A (SVA) continues to cause vesicular lesions in swine in Canada and many regions worldwide. Since the vesicular lesions caused by SVA are similar to those caused by foot and mouth disease virus , swine vesicular disease virus and vesicular stomatitis virus, a foreign animal disease investigation must be initiated to rule out these diseases. SVA isolates from pigs displaying vesicular lesions in Canada from 2015 to 2023 were sequenced, and phylogeographic analysis was performed using the complete genome sequences. The results infer that SVA has spread between the United States and Canada several times. In addition, the results suggest that SVA spreads from different regions. SVA spread was inferred from Canada into Thailand, India and Mexico and inferred from the United States to Brazil, Columbia, Chile and China with ten separate introductions. Furthermore, recombination was observed in SVA genomes from Canada, the United States and China. Source: Viruses,  htt...

Abstract H4Nx avian influenza viruses (AIVs) have been isolated from wild birds and poultry and can also cross the species barrier to infect mammals ( pigs and muskrats ). The widespread presence of these viruses in wild birds and poultry and their ability to be transmitted interspecies make them an undeniable hazard to the poultry farming industry. In the present study, we collected fecal and swab samples from wild birds and poultry in Guangdong Province from January 2019 to March 2024, and various subtypes of AIVs were isolated, including 19 strains of H4 subtype AIVs . Further analysis was conducted on the internal genes of the 19 strains . These strains clustered together with high homology to highly pathogenic avian influenza virus (HPAIV), suggesting that H4Nx AIV may be reassorted from HPAIV . Two H4N8 strains are phylogenetically related to the porcine H4N8 AIV. Molecular characterization revealed that all viruses in this study were less pathogenic but had potential mammalian-a...

Abstract Highly pathogenic avian influenza (HPAI) outbreaks have repeatedly occurred in two districts of Kerala state, India , over the last few years. The outbreaks in the wetland areas coincided with the arrival of migratory birds. At the time, the factors responsible for local transmission in ducks were not known. This study aimed to identify the socio-economic factors responsible for spatial variation in the occurrence of HPAI outbreaks in the two districts using Bayesian network modelling (BNM) and Stochastic Partial Differential Equation (SPDE) model. Further, information was collected on the duck rearing practices in rice paddy fields to identify the risk factors for local – spread of the outbreaks. We found that the SPDE model without covariates explained variation in occurrence of outbreaks. The number of rice paddy fields used by the duck farmers was identified as risk factor. We concluded based on BNM and SPDE that the infected migratory birds were the source of infection fo...

The World Health Organization regrets the announcement that the United States of America intends to withdraw from the Organization. WHO plays a crucial role in protecting the health and security of the world’s people, including Americans , by addressing the root causes of disease, building stronger health systems, and detecting, preventing and responding to health emergencies, including disease outbreaks, often in dangerous places where others cannot go. The United States was a founding member of WHO in 1948 and has participated in shaping and governing WHO’s work ever since, alongside 193 other Member States, including through its active participation in the World Health Assembly and Executive Board.  For over seven decades, WHO and the USA have saved countless lives and protected Americans and all people from health threats. Together, we ended smallpox, and together we have brought polio to the brink of eradication. American institutions have contributed to and benefited from mem...

A wild  Eurasian buzzard in  HaDarom region. Ashqelon : The outbreak occurred in an ecological park where poultry as ducks , guinea fowls , peacocks and wild birds are free living. Source: WOAH,  https://wahis.woah.org/#/in-review/6200 _____

Situation at a glance On 7 January 2025, the International Health Regulations National Focal Point for the Plurinational State of Bolivia notified WHO of a laboratory-confirmed case of Chapare virus infection in an adult male from La Paz Department .  Chapare haemorrhagic fever is an acute viral illness caused by Chapare virus .  The virus was first identified in 2003 in Bolivia and has been associated with five documented outbreaks to date, all occurring within the country.  These outbreaks have primarily affected rural areas in the La Paz Department, with the most recent case.  There is no significant risk of international spread of the disease, as person-to-person transmission of the Chapare virus is possible but remains rare in the general population.  As of 13 January 2025, no secondary cases have been reported, and all contacts remain without symptoms.  Public health measures , such as disinfection and rodent control, have been implemented. Descriptio...

PLYMOUTH — State environmental and health officials are informing the public that Highly Pathogenic Avian Influenza (HPAI), which very rarely infects humans, is suspected to be the cause of over 60 deceased Canada geese, swans, and other birds in Plymouth.  The Division of Fisheries and Wildlife (MassWildlife), the Massachusetts Department of Agricultural Resources (MDAR), and the Massachusetts Department of Public Health (DPH) are advising the public to refrain from handling birds or other animals that are dead or appear sick . Reporting wild birds:  The public should report observations of sick or deceased birds if 5 or more birds are found at a single location using this simple form at mass.gov/reportbirds. Reporting domestic birds:  The public should report sick or dead poultry or other domestic birds by calling MDAR’s Division of Animal Health at (617) 626-1795. Handling birds and other wildlife : The public should strictly avoid handling any sick or dead birds or other animal...

 A wild whooper swan in Bacău Region. Source: WOAH,  https://wahis.woah.org/#/in-review/6199 _____

Dodoma, 20 January 2025 – Tanzania today confirmed an outbreak of Marburg virus disease in the northwestern Kagera region after one case tested positive for the virus following investigations and laboratory analysis of suspected cases of the disease . President of the Republic of Tanzania, Her Excellency Samia Suluhu Hassan , made the announcement during a press briefing alongside World Health Organization (WHO) Director-General, Dr Tedros Adhanom Ghebreyesus , in the country’s administrative capital Dodoma. “Laboratory tests conducted in Kabaile Mobile Laboratory in Kagera and later confirmed in Dar es Salaam identified one patient as being infected with the Marburg virus. Fortunately, the remaining suspected patients tested negative ,” the president said. “We have demonstrated in the past our ability to contain a similar outbreak and are determined to do the same this time around.” A total of 25 suspected cases have been reported as of 20 January 2025 , all of whom have tested negati...