Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Epidemiological observations and heterosis analysis of gastrointestinal nematode parasitism in Suffolk, Gulf Coast Native, and crossbred lambs
Autore:
Li, Y; Miller, JE; Franke, DE;
Indirizzi:
Louisiana State Univ, Sch Vet Med, Dept Pathobiol Sci, Baton Rouge, LA 70803 USA Louisiana State Univ Baton Rouge LA USA 70803 , Baton Rouge, LA 70803 USA Louisiana State Univ, Louisiana Agr Expt Stn, Dept Anim Sci, Baton Rouge, LA 70803 USA Louisiana State Univ Baton Rouge LA USA 70803 , Baton Rouge, LA 70803 USA Louisiana State Univ, Louisiana Agr Expt Stn, Dept Vet Sci, Baton Rouge, LA 70803 USA Louisiana State Univ Baton Rouge LA USA 70803 , Baton Rouge, LA 70803 USA
Titolo Testata:
VETERINARY PARASITOLOGY
fascicolo: 4, volume: 98, anno: 2001,
pagine: 273 - 283
SICI:
0304-4017(20010727)98:4<273:EOAHAO>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
HAEMONCHUS-CONTORTUS INFECTION; ANTHELMINTIC RESISTANCE; SHEEP; SUSCEPTIBILITY; LEVAMISOLE; IVERMECTIN; LOUISIANA; RUMINANTS; EFFICACY; EWES;
Keywords:
nematode; sheep; crossbreeding; resistance; heterosis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Miller, JE Louisiana State Univ, Sch Vet Med, Dept Pathobiol Sci, Baton Rouge, LA 70803 USA Louisiana State Univ Baton Rouge LA USA 70803 ge, LA 70803 USA
Citazione:
Y. Li et al., "Epidemiological observations and heterosis analysis of gastrointestinal nematode parasitism in Suffolk, Gulf Coast Native, and crossbred lambs", VET PARASIT, 98(4), 2001, pp. 273-283

Abstract

A crossbreeding program was conducted to evaluate the resistant status to gastrointestinal nematode parasite infection in crossbred (F-1) lambs and their Suffolk and Gulf Coast Native (Native) breed counterparts. A total of 253 lambs were included in the study over 2 years. Fecal egg count (FEC) and blood packed cell volume (PCV) of 18-20 monitor lambs of each breed groupin each year were collected every other week from birth to 24-30 weeks of age. The FEC and PCV of all lambs were determined at weaning (11-12 weeks of age) and at three subsequent times when anthelmintic treatment was administered. Nematode counts of wether lambs were obtained at 30 weeks of age inthe first year. The epidemiological patterns of FEC and PCV of each breed group were similar in both years. The Suffolk group consistently showed thehighest FEC and the lowest PCV, Conversely, the Native group had the lowest FEC and highest PCV, For the most part, all parameters for the Fl group fell intermediate to the Native and Suffolk groups. Nematode count followed the same pattern. Heterosis analysis showed that FEC, PCV, nematode count and weight gain of the Fl group favored the Native group. These results suggested that crossbreeding Suffolk to Native sheep may be a suitable way to produce lambs with improved resistance to gastrointestinal nematode infection, but production may be compromised. (C) 2001 Elsevier Science B,V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 22:34:21