More cases of anap lasmosis have been detected in southeastern Manitoba cattle after an outbreak in the region appeared to have died down last summer.
Five new herds in the Rural Municipality of Stuartburn have been identified with anaplasmosis-positive cattle since October 2010, the Canadian Food Inspection Agency confirmed.
Eight positive animals in two of the herds were trace-outs from a herd which had been previously found with the disease. The investigation into this case is concluded and the herds have been removed from quarantine, said Dr. Lynn Bates, a CFIA veterinary program officer in Winnipeg.
Nine positive animals were identified in the three remaining herds, which had been previously infected. These herds remain under quarantine while the investigation continues. Quarantines on these farms will be removed once testing is completed and the reactor animals ordered slaughtered, Bates said.
CFIA compensates owners for animals confirmed positive for anaplasmosis.
CFIA reported the cases, all in the RM of Stuartburn, Jan. 21. Previously, the last confirmed case occurred in April 2010 in the same municipality.
Anaplasmosis, a federally reportable blood-borne disease of cattle, was detected in two separate regions of Manitoba in 2009. The first outbreak occurred in the eastern municipalities of Lac du Bonnet and Alexander. The second was in the southeastern municipalities of Stuartburn and La Broquerie.
In all, 24 beef cattle farms and one bison farm have been found with anaplasmosis
in the two regions, with 607 animals testing positive for the disease.
In the southeast region, 16 positive herds have been identified in the RM of Stuartburn. One positive herd was found in the RM of La Broquerie. About 7,800 animals have been tested in the two RMs, Bates said.
The anaplasmosis outbreak is the first in Manitoba since 1968. Its source is unknown.
It’s suspected the disease may have originated in northern Minnesota, where anaplasmosis has been identified in cattle on farms near the Canada-U. S. border.
Anaplasmosis can be transferred from one animal to another only through blood-to-blood contact . Some suggest ticks or biting insects from an infected U.S. animal may have come in contact with a Manitoba animal.
Bates said CFIA continues working with producers and local veterinarians to identify anaplasmosis. The agency is willing to retest herds if there’s any suspicion of disease, she said.
Don Winnicky, a Manitoba Beef Producers director, said he wished CFIA would retest every previously infected herd as a matter of course.
Winnicky, a producer from Piney, said the owners of 15 herds originally found with anaplasmosis were told the agency would retest them for three straight years. But they were only tested for one year, he said.
MBP and the provincial Agriculture Department are negotiating with CFIA to have all herds retested a second time, said Winnicky.
“It’s a reportable disease. We want it kept as a reportable disease and we want the disease cleaned up.” [email protected]
– DON WINNICKY, MBP