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Lake Memphremagog

All articles tagged with #lake memphremagog

science1 month ago•16 min saved

Catfish in Vermont Lakes Harbor a Rare Transmissible Cancer

Scientists have identified a clonally transmissible melanoma spreading among brown bullhead catfish in Lake Memphremagog and nearby waters across Vermont, New Hampshire, Maine, and New Brunswick, making it the fourth known naturally occurring transmissible cancer. The cancer cells move between fish through close contact (especially during spawning) and possibly via contaminated water or sediment. There is no known risk to humans, but the outbreak could affect local catfish populations and ecosystem health as researchers study its distribution and origins.

via The Times of India|

#catfish #lake-memphremagog #melanoma

science1 month ago•5 min saved

Freshwater cancer hops hosts: transmissible melanoma found in brown bullhead catfish

Researchers report that melanoma in brown bullhead catfish from Lake Memphremagog is a transmissible cancer—the cancer cells spread between fish—marking the first known freshwater transmissible cancer and the fourth in animals; transmission routes are not yet confirmed, the spread has raised conservation concerns, and there is no evidence it can infect humans.

via The Times of India|

#brown-bullhead-catfish #conservation #lake-memphremagog

science1 month ago•48 min saved

Wild brown bullhead catfish reveal first transmissible cancer documented in fish

Scientists studying brown bullhead catfish in Lake Memphremagog found melanoma in 23%–37% of sampled fish, and whole-genome sequencing revealed that the tumors across fish are strikingly similar and come from a single cancer cell line, indicating a transmissible cancer—the first known case in fish and the first documented in a freshwater species. The route of transmission is not yet known (close contact during spawning is a possibility), and there is no evidence humans are at risk from these fish or the lake water.

via Yahoo|

#brown-bullhead-catfish #genome-sequencing #lake-memphremagog

science1 month ago•3 min saved

Wild Catfish Carry First Known Case of Transmissible Cancer, Study Finds

Researchers studying brown bullhead catfish from Lake Memphremagog found a high rate of melanoma and, using whole-genome sequencing, evidence that the tumors in multiple fish are from a single cancer cell lineage that appears to spread between fish, marking the first known transmissible cancer in a fish and in a freshwater setting. Transmission may occur during close contact such as spawning, though the exact route isn’t proven. There’s no evidence this cancer affects humans or other species, but the finding could help scientists understand how cancer cells evade the immune system and persist across hosts.

via ABC News - Breaking News, Latest News and Videos|

#catfish #genome-sequencing #lake-memphremagog

science1 month ago•64 min saved

Lake Memphremagog Catfish Carry Transmissible Cancer, Study Finds

A Nature study confirms brown bullhead catfish in Lake Memphremagog host a transmissible cancer in which cancer cells spread between fish like a parasite. It’s only the fourth documented case of a contagious cancer in the animal kingdom. The tumors appear as black lesions; surveys from 2014–2017 found about 25–33% of the lake’s brown bullhead infected. Transmission mode is not yet known (spawn-related spread suspected), but researchers say it does not appear to pass to other species and poses no threat to human health. Further work is needed to understand spread and population impact.

via AOL.com|

#catfish #lake-memphremagog #nature

science1 month ago•3 min saved

Transmissible Melanoma Found in Memphremagog's Freshwater Fish

UVM researchers report that brown bullhead catfish in Lake Memphremagog carry a transmissible melanoma, with cancer cells moving between fish like parasites. DNA from cancers is more similar across individuals than to the fish, marking the first documented case of a transmissible cancer in freshwater fish. The disease is widespread in the lake, shows no proven link to local pollution, and poses no known risk to humans; the study, published in Nature, could illuminate how cancers evolve and spread.

via Seven Days Vermont|

#cancer-evolution #freshwater-fish #lake-memphremagog

science1 month ago•5 min saved

Contagious cancer spotted in wild catfish

Scientists have found a contagious cancer spreading among wild brown bullhead catfish in Lake Memphremagog, the fourth known naturally transmissible cancer. The melanoma-like tumours can spread between fish, with tumor genomes sharing a common lineage across individuals. The health impact is unclear, and how transmission occurs (likely direct contact) remains under study.

via Nature|

#catfish #contagious-cancer #lake-memphremagog

science1 month ago•16 min saved

A Lake's Silent Catfish Epidemic: Contagious Cancer Spreads

Researchers in Vermont and Quebec have identified what appears to be a contagious cancer spreading among brown bullhead catfish in Lake Memphremagog, likely arising from a single cancer cell; more than a third of the fish examined carried melanomas, prompting scientists to study how such cancers transmit and what this could reveal about cancer evolution, while noting there is no evidence that it can infect humans.

via The New York Times|

#brown-bullhead-catfish #contagious-cancer #fish