7
Views
0
CrossRef citations to date
0
Altmetric
Correspondence

Letters to the editor

Brucellosis in vaccinated cows

Page 188 | Published online: 23 Feb 2011
 

Abstract

Extract

Sir.—There has been some correspondence in the Velerinary Record recently concerning brucella abortion breakdowns in heifers vaccinated with Strain 19 Brucella abortus. This year we have been alarmed by the sudden occurrence of abortion storms in vaccinated heifers. Brucella abortus has been seen in large numbers in direct smears taken from cotyledons and foetal stomach contents stained by the modified Z-N technique, both in our own practice laboratory and at the Department of Agriculture laboratory. To remove any possible doubt as to the identity of the organism, it has been cultured. Blood samples have been taken from the heifers concerned and sent to the Department of Agriculture laboratory where agglutination titres to Br. abortus were observed at dilutions of up to 1 in 1,280. Our practice here serves 550 dairy farms in one of the most closely stocked areas in New, Zealand. In 18 herds more than 25% of the heifers have aborted owing to brucellosis.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.