PMID: 2505741Jun 1, 1989Paper

A farming systems study of abortion in dairy cattle on the Atherton Tableland. 2. The pattern of infectious diseases

Australian Veterinary Journal
J H NortonR S Campbell

Abstract

The role of infectious agents on dairy farms on the Atherton Tableland in tropical north Queensland was studied as part of a comprehensive investigation into the causes of bovine abortion. The prevalence of antibody in serums collected from 7 herds whose annual abortion rates ranged from 3% to 21% were as follows: Leptospira hardjo 49.9% (426/853), L. pomona 0.4% (3/851), bovine virus diarrhoea (BVD) 33.7% (35/104). Infectious bovine rhinotracheitis virus (IBR) 11.5% (12/105), Akabane virus 92.2% (95/103), Aino virus 62.1% (64/103), Chlamydia psittaci 3.1% (37/1004), Brucella abortus 0% (0/851), and Toxoplasma gondii 0% (0/105). Testing of serums against a wide range of leptospiral serotypes indicated that reactions occurring in the Hebdomadis and Sejroe serogroups were probably cross reactions with L. hardjo. Infection with L. hardjo and Akabane virus occurred prior to first mating and contact with Aino virus occurred during first pregnancy. Infection with BVD and IBR viruses was sporadic. The pathology and microbiology of 32 aborted foetuses from 24 Tableland herds (10 from the group of 19 farms under more intense study) were performed. Lesions associated with a Sarcocystis-like agent were present in 6, leptospires in 1, susp...Continue Reading

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Citations

Sep 28, 2006·Veterinary Research Communications·L G CorbelliniD Driemeier
Oct 2, 2003·Veterinary Microbiology·Tracey J BodettiPeter Timms
Aug 1, 1992·Australian Veterinary Journal·J A LaingR J Rawlinson
Aug 1, 1992·Australian Veterinary Journal·G SaviniP Seneviratna
Oct 1, 1993·Australian Veterinary Journal·C S McClintockM Woodrow
Jul 4, 2001·Australian Veterinary Journal·P F BlackM L Symonds
Apr 26, 2013·Australian Veterinary Journal·C WangdiB Gummow
Jun 18, 2014·Australian Veterinary Journal·S R Lanyon, M P Reichel
Jun 1, 1989·Australian Veterinary Journal·J H NortonR K Shepherd
Aug 4, 2015·Journal of Dairy Science·Jennifer M ChenCassandra B Tucker
Dec 31, 2019·Vector Borne and Zoonotic Diseases·Anthea BrennanVanessa R Barrs
Aug 7, 2008·Journal of Food Protection·Tanya MieAndreas Kiermeier

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