What was the response to the revelation that as many as 37 p.c of breast most cancers circumstances could also be attributed to publicity to bovine leukemia virus (BLV), a cancer-causing cow virus discovered within the milk of practically each dairy herd in the US? I talk about this difficulty in my video Trade Response to Bovine Leukemia Virus in Breast Most cancers. The business identified that some girls with out breast most cancers harbored the virus, too. Certainly, BLV was discovered within the tissues of 29 p.c of ladies who didn’t have breast most cancers, a discovering the researchers replied “isn’t a surprise contemplating the lengthy latency interval of breast most cancers…” In different phrases, they could not have breast most cancers but.

It could possibly take a long time earlier than a breast tumor may be picked up on mammography. So, although individuals could also be harboring this virus of their breast and feeling completely superb, the most cancers should be on its manner. That’s how different cancer-causing deltaretroviruses seem to work. These viruses could make proteins that intervene with our DNA restore mechanisms. Contaminated cells are then extra vulnerable to carcinogens and slowly accumulate mutations over time. “Due to this fact, proof of BLV in regular breast tissues previous to premalignant and malignant adjustments could be anticipated.” This sample is what we see with cervical most cancers, “by which the causative virus (HPV) is discovered not solely within the malignant [cancerous] tissue, but additionally in premalignant dysplastic areas [the precancerous tissue] and in regular tissue adjoining to the malignant tumor.”

If BLV, a retrovirus, is absolutely inflicting 1000’s of circumstances of breast most cancers yearly, wouldn’t a few of the anti-retroviral therapies like a few of the AIDS medicine be capable of counter it? Maybe, but it surely’s greatest to not get contaminated within the first place.

Nonetheless, the agriculture business gave the impression to be extra involved about client confidence in U.S. dairy than client most cancers. Certainly, the “U.S. dairy business face[d] a brewing public-relations brouhaha,” and it turned “involved about the potential for eventual obligatory management of those illnesses in dairy cattle together with public notion and an influence on the consumption of dairy merchandise.” What would management appear like? BLV is a blood-borne virus, however how is it unfold? Is Bessie sharing soiled needles? In a way, sure: “[B]lood (and BLV virus) is instantly unfold from animal to animal with blood contaminated needles and/or syringes, obstetrical sleeves, noticed or gouge dehorners, tattoo pliers, ear taggers, hoof knives, nostril tongs,” and different devices that aren’t disinfected between animals. So, for instance, when farmers are gouging or sawing on the cows’ heads throughout dehorning, “they’re prone to drive blood into the following animal in the course of the subsequent dehorning course of.” Or, after they’re sticking their arms into cows’ rectums for synthetic insemination, it’s not unusual for there to be rectal bleeding—then they only go from one cow to the following.

Greater than 20 nations have efficiently eradicated BLV from their herds by altering their practices, whereas it stays an epidemic in the US partly as a result of we’re not cleansing and disinfecting blood-contaminated gear for issues like “supernumerary teat removing,” which is completed as a result of “the presence of additional teats detracts from the fantastic thing about the cow.” Supernumerary teats are eliminated by pulling them from the udder and slicing them off with a pair of scissors. These scissors had higher be clear—in any other case they may unfold BLV from calf to calf and finally to somebody’s breakfast, lunch, or dinner. In fact, we may simply not slice off their teats in any respect, however then how would we “enhance udder look?”


As much as 37 p.c of breast most cancers circumstances are attributable to publicity to bovine leukemia virus? See my video The Function of Bovine Leukemia Virus in Breast Most cancers and its prequel, Is Bovine Leukemia Virus in Milk Infectious?.

The meat and dairy industries’ intransigence within the face of a human well being risk jogs my memory of the antibiotics and steroids points—persevering with to position the general public in danger to avoid wasting a couple of bucks. See, for instance, Antibiotics: Agribusinesses’ Pound of Flesh and Zeranol Use in Meat and Breast Most cancers.

In well being,
Michael Greger, M.D.

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