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Friday, September 10, 2010

BOVINE TUBERCULOSIS, BOVINE - USA (07): (MICHIGAN)

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A ProMED-mail post



ProMED-mail is a program of the

International Society for Infectious Diseases





Date: Tue 7 Sep 2010

Source: Up North Live [edited]







Second bovine TB case detected in Emmet County

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The Michigan Department of Agriculture (MDA) is holding an meeting for

Emmet County cow producers, after the United States Department of

Agriculture (USDA) classified a farm as being infected with bovine

tuberculosis (TB). Previous routine bovine TB surveillance testing

conducted by the MDA found a bovine TB positive herd in Emmet County in

March 2010. During the depopulation of the herd, a breeding bull was found

to be infected. During MDA's outbreak investigation of the herd it was

discovered the bull was leased to another producer in Emmet County.



On 13 Aug 2010, the United States Department of Agriculture (USDA)

classified the farm as being infected with bovine TB. This is the 2nd

infected herd in Northern Lower Michigan's Modified Accredited Advanced

Zone (MAAZ). The meeting for Emmet County producers is scheduled for Thu 16

Sep 2010 from 7:00 p.m. to 9:00 p.m. at the West Traverse Township Hall at

8001 M-119 in Harbor Springs. At this meeting, Dr James Averill (MDA's

bovine TB project coordinator) will discuss herd investigation, impact to

producers and the community, and answer questions.



"We have tested or scheduled all the cattle herds within a 10 mile [16 km]

radius circle around the positive herd that was identified last March

[2010], and they have been negative so far," said Dr Averill. "The trace

investigation is almost complete and only this herd was found to be exposed

to a lesioned animal. With this additional herd designation, the status of

the MAAZ is a concern as 4 positive cattle herds in a year may cause a drop

in our status. We've tested 67 farms in the special surveillance circle test."



On 4 Jan 2010, MDA, in coordination with USDA, expanded the MAAZ to include

Antrim, Charlevoix, Cheboygan, Crawford, Emmet, and Otsego counties. The

goal is to return bovine TB Free status to the entire state and testing is

an effective way to prevent bovine TB from spreading to other herds. MDA is

working to move a majority of the MAAZ to TB Free status while maintaining

MAAZ status for the above listed counties along with Presque Isle County.



"With the continued presence of bovine TB in the wild white-tailed deer

population in Northern Lower Michigan, Emmet County herd producers need to

utilize wildlife risk mitigation systems to protect their investments,"

said Averill. "As a reminder, producers should use such tools as disease

control permits, fencing, and sound livestock management practices to

reduce the risk of disease."



While infection can occur by nose-to-nose direct contact, infection is much

more likely to occur through indirect transmission through contaminated

feed. Beef and dairy farmers can decrease the risk of exposing their cattle

to bovine TB by limiting cattle-to-deer contact and protecting cattle feed

from deer.



This Emmet County herd is the 4th TB affected herd identified in Michigan

in 2010 -- a beef herd in Alcona County, and another in Alpena County are

in the Modified Accredited Zone (MAZ) where the disease is most prevalent.

The current bovine TB eradication effort began in 1998, and all of

Michigan's one million cattle were tested by the end of 2003. Testing

continues in the state for movement from one farm to another. Since 1998,

MDA and USDA have detected 50 cattle herds and 4 privately owned cervid

operations. These premises either have been depopulated or the herds were

quarantined and placed under a test-and-remove program.



--

communicated by:

ProMED-mail





[ProMED-mail post 20100325.0948 contains comments from Dr James Averill the

MDA bovine TB coordinator:



"If we test all the cattle herds within a 10-mile radius circle around the

positive herd, and they are negative, the status of the MAAZ will not be

impacted, as there would have to be at least 3 positive cattle herds in the

zone in a year, for the status to drop," said Dr James Averill, MDA's

bovine TB project coordinator.



Sadly these addition infected herds could affect the Modified Accredited

Advance Zone's status and may drop the status to Modified Accredited, which

would mean the entire state is in the same zone. A drop in status could

mean more testing for the state, and more testing for producers wishing to

move their animals. A map of the split state status may be found at

.



For more detailed information on bovine tuberculosis readers are encouraged

to see the moderator's comments on ProMED-mail post 20100325.0948.



The interactive HealthMap/ProMED map for Michigan is available at

- Mod.TG]



[see also:

Bovine tuberculosis, bovine - USA (06): (OH)20100715.2362

Bovine tuberculosis, bovine - USA (05): (CO) 20100614.1989

Bovine tuberculosis, bovine - USA (04): (KY) 20100528.1768

Bovine tuberculosis, cervid - USA: (MI) 20100418.1265

Bovine tuberculosis, bovine - USA (03): (NE) 20100409.1144

Bovine tuberculosis, bovine - USA (02): (MI) 20100325.0948

Bovine tuberculosis, bovine - USA: (SD) 20100107.0065

2009

---

Bovine tuberculosis - USA (12): (MN), cervid 20091222.4315

Bovine tuberculosis - USA (11): (IN) cervid 20090804.2742

Bovine tuberculosis - USA (10): (IN) cervid, bovine 20090714.2508

Bovine tuberculosis - USA (09): (IN) cervid, bovine 20090711.2480

Bovine tuberculosis - USA (08): (IN) cervid, bovine 20090628.2343

Bovine tuberculosis - USA (07): (MN) cervid 20090625.2307

Bovine tuberculosis - USA (06) (NE) (02) 20090620.2270

Bovine tuberculosis - USA (05): (NE) 20090613.2198

Bovine tuberculosis - USA (04): (TX) conf. 20090613.2195

Bovine tuberculosis - USA (03): (NE) cattle, elk 20090603.2060

Bovine tuberculosis - USA (02): (ND) 20090514.1811

Bovine tuberculosis - USA: (TX), susp 20090423.1536

Tuberculosis, captive wildlife - USA: (NE) 20090414.1423]



.................sb/tg/mj/sh







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1 comment:

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