Bro
Well-known member
my neighbor lost a bred heifer in late december, turned out it was johnes disease He almost did not test, as he thought it was hardware disease, but I suggested he take a blood sample when he put the animal down. Panic sets in, as he has had a closed herd for about 5 years, and keeps back upwards of 50-60 heifers a year. He figures apurchased four year old cow died from it in the summer while the recently deceased bred heifer was a calf, so thats where the exposure took place. He did blood work on his whole herd this year, (300 head)and one case came back positive. (vet says that is just the tip of the iceberg as disease can stay subclinical for quite a while). My neighbor had kept back 60 more hiefers to breed this summer, but has since decided to grass them out and send them to slaughter, as they were with the main herd untill early january and were exposed to the clinical case. He also realises that he will have to test for at least 4 more years to eradicate this disease from his herd. - not to mention cull every descendent of every positive case-- just in case. He calves in the spring, but sometimes has young calves in a nursing pen behind the barn. - he cleans up manir, spreads lime, and as an extra precaution, he also will not keep any calf that spends any time in those pens for whatever reason. This guy is a very concientous producer who knows he has a problem and therefore will meet his problem head on and take a hit in the pocketbook before he will spread the problem to other producers. He has gained my respect. Take note, if you buy bulls, ask if they have come from a johnes free herd. (with documentation via tests). The vets are saying it may possibly be spread through semen. Best bet is to raise your own heifers (assuming you are free of it). Anywhere from 2 to 25% of the beef herds have it, depending on the location in NA.- Not much is known about this disease, but it certainly sounds scary and will hit your bottom line pretty hard if you ignore it and it infiltrates your herd. It may even become a trade issue before long once this BSE thing gets to be old news. :!: