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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
immunology and microbiology
Bos taurus and Bos indicus (Sahiwal) calves respond differently to infection with Theileria annulata and produce markedly different levels of acute phase proteins
International Journal for Parasitology, Volume 35, No. 3, Year 2005
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Description
Disease-resistant livestock could provide a potentially sustainable and environmentally sound method of controlling tick and tick-borne diseases of livestock in the developing world. Advances in the knowledge and science of genomics open up opportunities to identify selectable genes controlling disease resistance but first, breeds and individuals with distinguishable phenotypes need to be identified. The Bos indicus breed, Sahiwal, has been exploited in dairy breeding programmes, because it is resistant to ticks and has relatively good performance characteristics compared to other indigenous cattle breeds of tropical regions. The analyses reported here show that Sahiwal calves were also more resistant than European Bos taurus (Holstein) dairy breed calves to tick-borne tropical theileriosis (Theileria annulata infection). Following experimental infection with T. annulata sporozoites, a group of Sahiwal calves all survived without treatment, with significantly lower maximum temperatures (P<0.01) and lower rates of parasite multiplication (P<0.05) than a group of Holstein calves, which all had severe responses. Although the Sahiwals became as anaemic as the Holsteins, other measures of pathology, including enlargement of the draining lymph node and the acute phase proteins, α1 acid glycoprotein and haptoglobin, were significantly less in the Sahiwals than in the Holsteins (P<0.05). Additionally, the Sahiwals had significantly lower resting levels of α1 acid glycoprotein than the Holsteins (P<0.05). Production of a third acute phase proteins, serum amyloid A, had very similar kinetics in both breeds. Acute phase proteins are produced in response to systemic release of the kinds of pro-inflammatory cytokines that are thought to be responsible for the pyrexic, cachectic and anorexic responses characteristic of tropical theileriosis. The prolonged production of α1 acid glycoprotein in the Holsteins is indicative of chronic production of circulating pro-inflammatory cytokines. In contrast, Sahiwals appear able to overcome infection with T. annulata as well as limit pathology by preventing the over-stimulation of pathways involving these cytokines. © 2005 Australian Society for Parasitology Inc. Published by Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Glass, Elizabeth Janet
United Kingdom, Midlothian
University of Edinburgh, Roslin Institute
Preston, Patricia M.
United Kingdom, Edinburgh
The University of Edinburgh
Craigmile, Susan C.L.
United Kingdom, Midlothian
University of Edinburgh, Roslin Institute
Kirvar, Erol
United Kingdom, Edinburgh
The University of Edinburgh
Wilkie, Gwen M.
United Kingdom, Edinburgh
The University of Edinburgh
Brown, C. G.Duncan
United Kingdom, Edinburgh
The University of Edinburgh
Statistics
Citations: 94
Authors: 6
Affiliations: 2
Identifiers
Doi:
10.1016/j.ijpara.2004.12.006
ISSN:
00207519
Research Areas
Cancer
Genetics And Genomics