Monday, November 10, 2008

Daten zum Abschluss

The report I mentioned earlier conducted by a Dakota dermatologist postulating a high risk of lead blood levels in game killed by hunters is refuted by the CDC of all public health organizations. The CDC helped organize a cohort study of 740 people in the same region of North Dakota (the cohort, I guess) and they accounted for a common confounder (socioeconomic background and more importantly housing) in lead studies. As you can expect, the study found older people and people who worked with lead to have higher lead-blood levels. And it also found a significant increase in lead-blood levels with people who ate wild game. The only problem was that people usually ate several types of wild game, so it was hard to account which wild game had the most impact (I'm guessing birds since the shot used in shotgun shells is uncoated and very hard to find due to the small size), but there was a significant increase in the lead-blood levels among participants who had recently eaten game.
The study did note that the cohort had lower lead-blood levels than the average person, but they conclude that careful cleaning practices could reduce amounts of ingested lead, and that there's an unknown effect of children eating wild game since children are more susceptible to lower lead levels in their development stage.

So what does this mean? There's probably an increased risk of having higher blood levels than people who don't eat wild game, but this depends on the amount of wild game you eat. And, you might have to work with lead and eat a lot of wild game in order to get dangerously high lead-blood levels.
The report does also mention that a previous study done on lead levels in wild game were focused primarily on ground venison. The meat you use to grind is not high quality. As a matter of fact, if the deer were harvested humanely with a chest shot, the ribs and brisket would have a large amount of lead in them (assuming lead flakes off from the bullet), so you can see the problem with trying to assume that all venison would have the same amount of lead as the meat close to the entrance and exit hole. Ultimately if you use copper jacketed bullets or completely lead free bullets, like Barnes XXX, your exposure to lead will be very low.
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