T-Stor
 

T-Stor >
Other Teagasc Research >
Teagasc publications in Biomed Central >

Please use this identifier to cite or link to this item: http://hdl.handle.net/11019/263

Title: Effect of pre-weaning concentrate supplementation on peripheral distribution of leukocytes, functional activity of neutrophils, acute phase protein and behavioural responses of abruptly weaned and housed beef calves
Authors: Lynch, Eilish M
McGee, Mark
Doyle, Sean
Earley, Bernadette
Keywords: Abrupt weaning
Beef calves
Issue Date: 4-Jan-2012
Publisher: Biomed Central
Citation: Lynch, E. M., McGee, M., Doyle, S. and Earley, B. Effect of pre-weaning concentrate supplementation on peripheral distribution of leukocytes, functional activity of neutrophils, acute phase protein and behavioural responses of abruptly weaned and housed beef calves. BMC Veterinary Research 2012, 8:1 doi:10.1186/1746-6148-8-1
Series/Report no.: BMC Veterinary Research
Abstract: Background: The effect of pre-weaning concentrate supplementation on peripheral distribution of leukocytes, functional activity of neutrophils, acute phase protein response, metabolic and behavioural response, and performance of abruptly weaned and housed beef calves was investigated. Calves were grazed with their dams until the end of the grazing season when they were weaned and housed (day (d) 0) in a concrete slatted floor shed, and offered grass silage ad libitum plus supplementary concentrates. Twenty-six days prior to weaning and housing, 20 singled suckled, pure-bred Simmental male (non-castrated), (n = 10, m) and female (n = 10, f) calves were assigned to one of two treatments (i) concentrate supplement (CS: n = 10 (5 m and 5 f), mean age (s.d.) 201 (12.8) d, mean weight (s.d.) 258 (20.2) kg) or (ii) no concentrate supplement (controls) (NCS: n = 10, (5 m and 5 f), mean age (s.d.) 201 (13.4) d, mean weight (s.d.) 257 (19.6) kg) pre-weaning. Results: There was a treatment × sampling time interaction (P < 0.05) for percentage CD4+ and WC1+ (γδ T cells) lymphocytes and concentration of plasma globulin. On d 2, percentage CD4+ lymphocytes decreased (P < 0.001) in both treatments. Subsequently on d 7, percentage of CD4+ lymphocytes increased (P < 0.01) in CS compared with d 0, whereas percentage of CD4+ lymphocytes in NCS did not differ (P > 0.05) from d 0. On d 2, WC1+ lymphocytes decreased (P < 0.05) in both treatments but the decrease was greater (P < 0.05) in NCS than CS. Subsequently, percentages did not differ (P > 0.05) from pre-weaning baseline. On d 2, the increase in concentration of globulin was greater (P < 0.05) in CS compared with NCS, and subsequently there was no difference between treatments. Pre-weaning ADG was 1.07 (s.e.m.) (0.26) kg and 0.99 (s.e.m.) (0.26) kg for CS and NCS, respectively. Post-weaning, CS calves spent more time lying compared with NCS calves. Conclusions: Calves supplemented with concentrate prior to weaning had a lesser reduction in WC1+ lymphocytes, increased percentage CD4+ lymphocytes and concentration of total protein, and spent more time lying post-weaning, compared with non-supplemented calves.
Description: peer-reviewed
URI: http://hdl.handle.net/11019/263
http://dx.doi.org/10.1186/1746-6148-8-1
Appears in Collections:Animal & Bioscience
Livestock Systems
Teagasc publications in Biomed Central

Files in This Item:

File Description SizeFormat
1746-6148-8-1.pdf411.55 kBAdobe PDFView/Open

This item is protected by original copyright


View Statistics

Items in T-Stor are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! Teagasc - The Agriculture and Food Development Authority  2012  - Feedback