2023-08-01 11:36:30
Title: Swine Flu Transmissions Between Humans and Pigs Detected in the United States, Prompting Concern
Source: United States Department of Agriculture (USDA)
Date: [Insert Date]
The United States Department of Agriculture (USDA) has recently revealed alarming findings regarding the transmission of swine flu between humans and pigs. According to genetic research conducted by USDA researchers, there have been at least 370 instances of humans passing the H1N1 virus variant pdm09 to pigs over the past 12 years. Additionally, the virus has been transmitted from pigs to humans in 17 recorded cases.
Swine flu, caused by the influenza A or H1N1 virus, first appeared in pigs before spreading to humans. The pdm09 variant gained prominence during the 2009 outbreak in humans and has since become established in pig populations. While only a small number of human infections have been recorded, the potential for further transmission raises concerns about public health.
To gain a better understanding of how the virus spreads between humans and pigs, USDA researcher Tavis Anderson and his colleagues analyzed genetic sequences of H1N1 virus samples collected from both humans and pigs in the US between 2009 and 2021. Out of 1112 samples collected from pigs, 1112 were found to be of the pdm09 strain.
According to Anderson, viruses evolve rapidly within a host’s body, often acquiring distinct traits in different species. By comparing the genetic similarities and differences between virus samples, the researchers were able to identify cases of transmission between humans and pigs. Notably, the study suggests that the number of actual transmissions could be higher than reported, as not all infections lead to illness.
The rapid evolutionary changes observed in the virus present challenges for the development of effective vaccines against swine flu. The research indicates that vaccines may become less effective due to the virus’s ability to evolve quickly in pigs. However, during the COVID-19 pandemic, cases of pdm09 in humans declined while the virus continued to circulate among pigs originating from previous years’ infections.
While the report showcases the persistent threat of swine flu transmission, it also highlights the potential for reducing cross-species transmission through proper control measures. Implementing robust preventive measures can help minimize infections and preserve the efficacy of vaccines.
In related news, the Netherlands has also been investigating the prevalence of the H1N1 pdm09 variant. The animal health company GD collected a total of 522 respiratory tract samples from piglets, fattening pigs, and sows between November 2022 and March 2023. The study revealed that approximately 45 percent of the samples were PCR-positive for the influenza A virus. H1N1 and H1N2 variants were found in nearly equal proportions across pig farms in different regions of the country.
Dutch health organizations, including the RIVM, Royal GD, Erasmus MC, and Wageningen Bioveterinary Research, are collaborating to track and understand the occurrence of swine flu viruses in pigs. Ongoing studies involve the examination of 200 swine influenza viruses from various companies across the country.
The results of these investigations will provide crucial insights into the possible transmission of swine flu to humans. Interim findings are being shared with participating veterinarians, health organizations, and the World Health Organization (WHO) to ensure prompt response and preventive measures.
As the fight against swine flu intensifies globally, continued research and international collaboration will play a vital role in safeguarding public health and preventing future outbreaks.
[Insert hyperlink to USDA report]]
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