| Full text | |
| Author(s): |
Louvandini, H.
[1]
;
Rodrigues, R. R.
[2]
;
Gennari, S. M.
[3]
;
McManus, C. M.
[1]
;
Vitti, D. M. S. S.
[2]
Total Authors: 5
|
| Affiliation: | [1] Univ Brasilia, Fac Agron & Med Vet, BR-70910900 Brasilia, DF - Brazil
[2] Univ Sao Paulo, Ctr Energia Nucl Agr, BR-13400970 Piracicaba, SP - Brazil
[3] Univ Sao Paulo, Fac Med Vet & Zootecnia, BR-05508900 Sao Paulo - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Veterinary Parasitology; v. 163, n. 1-2, p. 47-51, JUL 7 2009. |
| Web of Science Citations: | 7 |
| Abstract | |
Ten male Holstein calves (74.3 +/- 3.2 kg LW) were used for a trial with trickle infection with Cooperia punctata to evaluate phosphorus (P) kinetics. Five calves were inoculated with 10,000 L(3) stage larvae per week during 35 days, while the other group of five calves was kept as a control. On the 29th day each calf was intravenously injected with 29.6 MBq of a (32)p solution. Blood samples were taken at 24 h periods for 7 days, after which all calves were slaughtered and worms burdens. Faeces, urine and tissue samples were taken for analysis using isotopic dilution and modeling techniques. The number of eggs per gram of faeces (EPG)was 1920 +/- 168 on 28th day and the total number of worms burdens was 11,131 +/- 1500. Infected calves showed lower feed intake and live weight gain, as well as lower P intake, absorption and retention than control calves. The P flows between body compartments were lower for blood to gastrointestinal tract (TGI), TGI to blood, blood to soft tissues, bone balance and soft tissue balance in infected calves when compared to the control. The trickle infection of C punctata affected P metabolism due to the decrease in P retained and live weight due to fall in feed intake. (C) 2009 Elsevier B.V. All rights reserved. (AU) | |
| FAPESP's process: | 00/00640-0 - Mathematical models for the study of phosphorus and calcium kinetics and metabolism in ruminants and non-ruminants |
| Grantee: | Dorinha Miriam Silber Schmidt Vitti |
| Support Opportunities: | Research Projects - Thematic Grants |