Assessment of genetic variability of resistance to gastrointestinal nematode parasites in Creole goats in the humid tropics.

2001 ◽  
Vol 79 (7) ◽  
pp. 1706 ◽  
Author(s):  
N Mandonnet ◽  
G Aumont ◽  
J Fleury ◽  
R Arquet ◽  
H Varo ◽  
...  
Keyword(s):  
Genetic Variability ◽  
Gastrointestinal Nematode ◽  
Humid Tropics ◽  
Nematode Parasites

The epizootiology of gastrointestinal nematode parasites in Greek dairy breeds of sheep and goats

2003 ◽  
Vol 47 (3) ◽  
pp. 193-202 ◽  
Author(s):  
E Papadopoulos ◽  
G Arsenos ◽  
S Sotiraki ◽  
C Deligiannis ◽  
T Lainas ◽  
...  
Keyword(s):  
Gastrointestinal Nematode ◽  
Sheep And Goats ◽  
Nematode Parasites

Gastrointestinal nematode populations with multiple anthelmintic resistance in sheep farms from the hot humid tropics of Mexico

2017 ◽  
Vol 9 ◽  
pp. 29-33 ◽  
Author(s):  
F.A. Herrera-Manzanilla ◽  
N.F. Ojeda-Robertos ◽  
R. González-Garduño ◽  
R. Cámara-Sarmiento ◽  
J.F.J. Torres-Acosta
Keyword(s):  
Anthelmintic Resistance ◽  
Gastrointestinal Nematode ◽  
Humid Tropics

scholarly journals Some larval morphological characteristics of Camelostrongylus mentulatus and Nematodirus spathiger

2020 ◽  
Vol 3 (2) ◽  
pp. 7-11
Author(s):  
A. Saidi ◽  
R. Mimouni ◽  
F. Hamadi ◽  
W. Oubrou
Keyword(s):  
Morphological Characteristics ◽  
Gastrointestinal Nematode ◽  
Parasitic Nematodes ◽  
Morphological Identification ◽  
Morphological Pattern ◽  
Wild Ruminants ◽  
Nematode Parasites ◽  
Domestic Ruminants ◽  
Teladorsagia Circumcincta ◽  
Camelostrongylus Mentulatus

Monitoring of gastrointestinal nematode parasites in ruminants (domestic and wild) is often based on fecal examination techniques, looking for excreted eggs and larval forms using morphological keys. These, are more available in domestic ruminants, in which helminths are widely studied, than in wild ruminants.  This study tried to provide certain morphological elements that will help to recognize the L3 larvae of Camelostrongylus mentulatus and Nematodirus spathiger that could parasite either domestic or wild ruminants. For that, we resorted first to the culture of L3 larvae from fecal samples taken from African antelopes, and second by the microscopic characterization of each isolated larval morphological pattern previously identified by sequencing of its internal transcribed spacer (ITS-2) regions of the ribosomal DNA. The results of different microscopic captured images showed that Camelostrongylus mentulatus larva is 16 intestinal cells that measuring approximately 820 µm length, ‎≈ 25 µm wide, and ‎≈ 47 µm for its sheath tail extension and by this be closer to Teladorsagia circumcincta characteristics.  For Nematodirus spathiger, it possesses 8 gut cells and measuring about 1020 µm long, ‎≈ 25 µm wide, and‎ ≈ 143 µm for its sheath tail extension with specific tail appendages. Have done this, we were able to get some clarifications on the morphology of the studied larvae, and we believe thus that this study will contribute to the establishment of morphological identification keys especially for parasitic nematodes of wild ruminants.

scholarly journals Effect of pasture species on internal parasites of lambs

1996 ◽  
pp. 59-62 ◽  
Author(s):  
T.L. Knight ◽  
R.A. Moss ◽  
T.J. Fraser ◽  
J.S. Rowarth ◽  
R.N. Burton
Keyword(s):  
White Clover ◽  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Plantago Lanceolata ◽  
Gastrointestinal Nematode ◽  
Gastrointestinal Nematodes ◽  
Grass Species ◽  
Adult Nematode ◽  
Intestinal Nematode ◽  
Nematode Parasites

Increasing resistance of gastro-intestinal nematode parasites to anthelmintics and consumer resistance to the possibility of residues in animal products have prompted research on the effect of pasture species on nematodes and animal performance. Lambs (either infected with high rates of gastrointestinal nematodes or maintained nematode-free) were grazed on pure swards of chicory, high- or low-endophyte ryegrass, cocksfoot, tall fescue, lucerne, lotus, white clover or plantain. Infected lambs that grazed chicory had lower faecal egg counts and adult nematode populations, and higher carcass weights, than lambs grazed on plantain or the grass species; lambs that grazed legumes generally had intermediate counts, populations and weights. When kept parasite-free, carcass weights were up to 48% greater than in the nematodeinfected treatments. On farmlets run over 3 years, substituting 30% of the ryegrass area with lucerne or replacing the ryegrass with a multi-species mix consisting predominantly of bromes, tall fescue, phalaris, timothy and red and white clover, had no effect on gastrointestinal nematode larvae, lamb faecal worm egg or adult nematode numbers. It is concluded that a diet of pure chicory affects internal parasite populations but the small proportion included in the farmlet studies had no effect. Keywords: Cichorium intybus, Dactylis glomerota, Festuca arundinacea, gastro-intestinal nematodes, lambs, Lolium perenne, Lotus corniculatus, Medicago sativa, pasture species, Plantago lanceolata, Trifolium repens

scholarly journals Reduction rate of nematode egg counts and third-stage larvae development from sheep and goat faeces preserved at 4οC

2018 ◽  
Vol 67 (3) ◽  
pp. 177 ◽  
Author(s):  
A. DRIMTZIA ◽  
E. PAPADOPOULOS
Keyword(s):  
Reduction Rate ◽  
Small Ruminants ◽  
Storage Period ◽  
Gastrointestinal Nematode ◽  
Sheep And Goats ◽  
Nematode Parasites ◽  
Faecal Samples ◽  
Third Stage ◽  
Faecal Egg Counts ◽  
Larvae Development

Gastrointestinal nematode parasites cause major production losses to small ruminants. The most common way to diagnose or monitor the worm burdens in sheep and goats remains the quantitative parasitological examinations, i.e. the faecal egg counts. However, the reliability of the results of such methods depends greatly on the conditions and duration of the storage of the faecal samples prior to examination. The aim of this research was to evaluate the reduction rate and the maximum storage period, without significant losses, of nematode egg counts and third-stage larvae development from sheep and goat faeces preserved at 4οC. Towards this end, a pooled faecal sample was formed by collecting faeces from naturally infected sheep and goats (separately). Faecal egg counts and coprocultures were performed on fresh faeces and on preserved ones every week and up to 119 days post sampling. It was concluded that the preservation at 4oC, i.e. into a refrigerator, of fresh faeces from sheep and goats for parasitological examinations poses danger of misdiagnosis, if not performed in a period not exceeding 3 weeks of time. The rate of reduction of the faecal nematode egg counts starts to be significant lower than the ones performed with fresh samples, for both sheep and goats, after the third week of storage. The percentage of the gastrointestinal nematode larvae developing to the infective third–stage alters significantly for the Haemonchus genus, soon after the first week of storage (p<0.05).

Effects of Gastrointestinal Nematode Parasites on Performance in Feedlot Cattle

1969 ◽  
Vol 28 (5) ◽  
pp. 698-704 ◽  
Author(s):  
Edward R. Ames ◽  
Robert Rubin ◽  
John K. Matsushima
Keyword(s):  
Gastrointestinal Nematode ◽  
Feedlot Cattle ◽  
Nematode Parasites

Su.45. A Role for High Molecular Weight Mast Cell-Derived Proteoglycans in Mucosal Immunity Against Gastrointestinal Nematode Parasites

2006 ◽  
Vol 119 ◽  
pp. S175
Author(s):  
Denchris Onah ◽  
Fukumi Nakamura-Uchiyama ◽  
Masao Ono ◽  
Toshiyuki Takai ◽  
Yukifumi Nawa
Keyword(s):  
Molecular Weight ◽  
Mast Cell ◽  
High Molecular Weight ◽  
Mucosal Immunity ◽  
Gastrointestinal Nematode ◽  
Nematode Parasites

Are Scottish Blackface ewes more resistant to nematode parasite infection than Greyface ewes?

2009 ◽  
Vol 2009 ◽  
pp. 28-28
Author(s):  
A Kidane ◽  
J G M Houdijk ◽  
B J Tolkamp ◽  
S Athanasiadou ◽  
I Kyriazakis
Keyword(s):  
Genetic Resistance ◽  
Gastrointestinal Nematode ◽  
Parasite Infection ◽  
Nematode Parasite ◽  
Nutrient Demand ◽  
Nematode Parasites ◽  
Breed Differences ◽  
Lower Extent ◽  
Ad Libitum ◽  
Per Se

The extent of periparturient relaxation of immunity (PPRI) to gastrointestinal nematode parasites is sensitive to metabolisable protein (MP) scarcity but also varies between breeds of sheep (Houdijk, 2008). For example, under ad libitum feeding, Scottish Blackface ewes had a lower extent of PPRI than Greyface ewes (Zaralis et al., 2008). Such between-breed variation in PPRI may not necessarily be associated with genetic resistance per se but could arise from a higher nutrient demand of the more productive Greyface ewes (Houdijk, 2008). This experiment was designed to test the hypothesis that if the extent of PPRI has only a nutritional basis, then the sensitivity of PPRI to MP scarcity will not differ between the breeds when MP feeding is adjusted for between-breed differences in MP demand.

The effectiveness of copper oxide wire particles as an anthelmintic in purebred Suffolk lambs exposed to a natural nematode challenge post weaning

2007 ◽  
Vol 2007 ◽  
pp. 95-95
Author(s):  
B. Good ◽  
J.P. Hanrahan
Keyword(s):  
Copper Oxide ◽  
Broad Spectrum ◽  
Dominant Role ◽  
Gastrointestinal Nematode ◽  
Parasitic Infections ◽  
Parasite Control ◽  
Nematode Parasites ◽  
Genetic Makeup ◽  
Terminal Sire ◽  
Alternative Solutions

Resistance to nematode parasites of sheep to broad spectrum anthelmintics is one of the main drivers in research on alternative solutions for parasite control. Previous work has shown clear differences between the Suffolk and Texel breeds in susceptibility to gastrointestinal nematode infection (Hanrahan & Crowley, 1999; Good, Hanrahan et al., 2006). The Suffolk being more susceptible to such parasitic infections has implications in the Irish industry where it plays a dominant role as both as a terminal sire and in the genetic makeup of the ewe population. Previous work has shown some beneficial anthelmintic effects following the administration of copper oxide wire particles (Bang, Familton et al., 2000; Knox, 2002). The aim of this study was to evaluate the potential of copper oxide wire particles (COWP) as an anthelmintic for lambs that were exposed to a natural nematode challenge postweaning.

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