MEXICO REPORTS FIRST HUMAN H5N1 AVIAN FLU CASE
On April 4, 2025, Mexico’s government reported the country’s first human H5N1 avian flu infection, involving a 3-year-old girl from Durango state, who is in serious condition. The girl was hospitalized in Torreón and treated with oseltamivir. The source of her infection is unknown, and no outbreaks have been reported at commercial farms. Wild bird sampling around her home has been conducted, and surveillance in the area has been established. The girl’s parents have tested negative for the virus. The H5N1 virus was recently detected in wild geese in Durango state, about 16 miles from a poultry farm, and in captive vultures at a zoo. In May 2024, a fatal human case of H5N2 avian flu was reported in Mexico, involving a 59-year-old man with no known poultry exposure. (CIDRAP)
U.S. CHINA BIOWEAPONS DISPUTE HIGHLIGHTS BWC WEAKNESSES
In 2019, U.S. Department of Defense officials raised concerns with China about experiments involving marine neurotoxins, hoping for reassurance. However, China responded with disinformation and accusations, including claims the U.S. released COVID-19 as a bioweapon. This breakdown exposed weaknesses in the Biological Weapons Convention (BWC), which lacks verification measures and transparency. With rapid advancements in biotechnology, like synthetic biology and AI, there’s fear that more deadly and transmissible bioweapons could emerge. Efforts to strengthen the BWC, including using AI for monitoring and improving DNA screening, face challenges, as exemplified by Russia’s ongoing bioweapons lab renovations. Despite these concerns, the BWC remains a key arms control treaty, with more than 20 bioweapons programs shut down since its inception. However, emerging technologies and potential violations by countries like Russia, North Korea, and Iran highlight the need for stronger enforcement. The BWC’s effectiveness may depend on political will and global cooperation. (Science)
HEALTH SECRETARY KENNEDY TO REVIEW FLUORIDATION GUIDELINES
U.S. Health Secretary Robert F. Kennedy Jr. announced plans to direct the Centers for Disease Control and Prevention (CDC) to stop recommending fluoridation in public drinking water. He is forming a task force to review the issue and make new recommendations. The U.S. Environmental Protection Agency (EPA) is also reviewing scientific data on potential health risks of fluoride. While Kennedy cannot directly stop communities from fluoridating their water, he can influence CDC guidance and collaborate with the EPA to change fluoride limits. Utah recently became the first state to ban fluoride in its public water, citing health concerns. Kennedy, who has long criticized fluoride as a neurotoxin linked to various health issues, praised Utah’s leadership. Fluoride has been added to U.S. drinking water since the 1950s to reduce cavities, but research has raised concerns about its potential impact on health, including links to lower IQ and developmental issues at high levels. (AP)
FORMER FDA OFFICIALS WARN OF DAMAGE FROM LEADERSHIP CUTS
Several former FDA officials, including Janet Woodcock, Jeff Shuren, and Frank Sasinowski, spoke about the consequences of President Donald Trump’s overhaul of federal health agencies, particularly the FDA. Woodcock described the leadership cuts as deliberate and detrimental to drug reviews, likening the situation to a hospital losing its nurses and support staff while retaining only doctors. She warned that these changes would lead to slower drug approvals and potential mistakes in the drug development process. The FDA’s recent loss of 3,500 positions has already impacted its work, especially at the Center for Devices and Radiological Health. Sasinowski noted that rare disease drug development could be disproportionately affected due to the loss of technical expertise. With 676 FDA site lease terminations and significant staff cuts planned, morale at the FDA is low. Despite challenges, Woodcock praised remaining staff for their dedication to the agency’s mission, though she predicted increasing difficulties ahead. (Fierce Biotech)
STUDY FINDS MICROPLASTICS ACCUMULATING IN HUMAN BRAIN AND BODY
Marcus Garcia, a postdoctoral fellow at the University of New Mexico, and his team are investigating how microplastics accumulate in the human body. Their recent study found that human brain samples from 2024 contained nearly 50% more microplastics than samples from 2016, with higher concentrations in dementia brains. Their research has also detected microplastics in human testes, placentas, and even blood, semen, and breast milk. Despite alarming findings, the researchers still lack understanding of the health impacts and sources of these particles. They hypothesize that microplastics may primarily enter the body through ingestion, especially from older plastic waste that has weathered over time. The team is investigating the effects of these particles, particularly on the brain, and conducting animal studies to assess potential health risks. Though still in the early stages, this research could have significant implications for human health, as microplastics continue to accumulate in the environment. (New York Times)
HUMAN METAPNEUMOVIRUS CIRCULATION TRENDS IMPACTED BY PANDEMIC
Human metapneumovirus (hMPV) causes respiratory illness similar to respiratory syncytial virus (RSV), but there are no specific antiviral treatments or vaccines for hMPV, unlike for RSV. A recent report analyzed hMPV circulation relative to RSV epidemics from July 2014 to June 2024. Pre-pandemic, hMPV typically began circulating in early January, peaked in late March, and ended by early June, with an average duration of 21 weeks. However, the 2021-22 season was unusually long, lasting 35 weeks, before returning to typical seasonality in 2022-23 and 2023-24. During the pandemic (2021-23) and post-pandemic (2023-24), RSV seasons ended earlier, with offsets in January or March instead of April. The gap between RSV and hMPV peaks increased from a median of 11.5 weeks pre-pandemic to 19 weeks post-pandemic. Co-circulation of RSV and hMPV was brief in most regions during recent seasons, highlighting the importance of real-time surveillance for guiding testing, care, and health system preparedness. (CDC)
MITOCHONDRIA FOUND TO TRAVEL BETWEEN CELLS AIDING REPAIR
Recent research has revealed surprising new behaviors of mitochondria, traditionally known as the powerhouses of cells. Mitochondria, long thought to be stationary within cells, are now recognized as capable of traveling between cells, a process called mitochondrial transfer. This transfer has been observed in various organisms, including yeast, mollusks, and rodents, and it appears to serve different purposes. It may help cells recover from damage, promote tissue repair, or even aid cancer cells in evading the immune system. Although the mechanism behind this transfer is not fully understood, it seems to play a role in maintaining healthy tissues and promoting recovery, such as in stroke or wound healing. Researchers are now exploring how this process can be leveraged for treatments, including enhancing T-cell therapies for cancer or addressing mitochondrial dysfunction in diseases like Leigh syndrome. However, much remains unknown about the full extent and implications of mitochondrial transfer for human health. (Nature)
AUSTRALIAN RESEARCHERS DEVELOP GENE-EDITED TOADS TO CONTROL POPULATION
Researchers in Australia are exploring a novel bioengineering solution to combat the invasive cane toad population. By removing a single gene in toad eggs, they have created “Peter Pan toads,” whose tadpoles never undergo metamorphosis and remain in the tadpole stage. These modified tadpoles are voracious cannibals, consuming more eggs and tadpoles than regular ones, potentially limiting the toad population. The gene-edited tadpoles grow larger and consume up to three times as many eggs, potentially eradicating their own species in certain conditions. However, challenges remain, as these modified tadpoles do not reach maturity, making mass production difficult. Researchers hope to introduce a hormone to trigger the development of some tadpoles into adults, allowing them to breed and produce more gene-edited tadpoles. Though field trials are planned, the risk of introducing genetically modified organisms into the wild is still under scrutiny, with concerns about potential ecological impacts. (ABC)
COLLOSSAL BIOSCIENCES CREATES FIRST DE-EXTINCT SPECIES DIRE WOLF
Colossal Biosciences, a Dallas-based biotech company, has successfully created the first “de-extinct” species: the dire wolf, which went extinct about 12,500 years ago. Using ancient DNA, cloning, and gene-editing techniques, Colossal produced three dire wolf pups by modifying the genes of gray wolves, their closest living relatives. These pups are a hybrid species resembling the extinct dire wolf, known for its larger size and stronger features. The company’s efforts were based on DNA extracted from 13,000- and 72,000-year-old fossils. While the dire wolves are not fully genetically pure, they exhibit many traits of the extinct species. The pups are housed in a secure facility and monitored closely. Critics question the practical implications of resurrecting extinct species, particularly in ecological contexts, but Colossal aims to use this technology for both de-extinction and conservation efforts, including aiding endangered species like red wolves. (CNN)
Thanks for reading. Let’s be careful out there.
WORDS: The Biology Guy.
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