Host specificity of sheep and cattle nematodes in São Paulo state, Brazil

Amarante, Alessandro Francisco Talamini do; Bagnola, Jose; Amarante, Mônica Regina Vendrame; Barbosa, Maria Aparecida

doi:10.1016/s0304-4017(97)00036-8

Cited by 93 publications

(57 citation statements)

References 22 publications

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“…identificada nos ovinos mantidos como controle, podese estimar a freqüência da espécie, cujos índices são, em ordem decrescente: T. colubriformis: 41,4%; H. contortus: 37,1%, S. papillosus: 15,5%, C. curticei: 4,38%, C. punctata: 0,81%, O. columbianum: 0,64%, T. axei: 0,16%, C. pectinata: 0,1% e C. spatulata e T. ovis: 0,03%. Estes resultados confirmam que as espécies H. contortus e T. colubriformis são as mais prevalentes no Brasil e no Estado de São Paulo (Amarante et al, 1997), contudo, diferem dos obtidos por Vasconcelos et al (1985), que encontraram maior freqüência de H. contortus, seguido pelo T. colubriformis em ovinos do Município de Catanduva, SP. Predomínio de H. contortus também foi observado por Kawano et al (2001), em cordeiros, aos 120 dias de idade, em Londrina, PR.…”

Section: Resultsunclassified

Eficácia anti-helmíntica comparativa da associação albendazole, levamisole e ivermectina à moxidectina em ovinos

Buzzulini

Sobrinho

Costa

et al. 2007

Pesq. agropec. bras.

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Resumo -Avaliou-se a eficácia anti-helmíntica da associação de albendazole 2,0%, cloridrato de levamisole 2,55% e ivermectina 0,08% comparativamente à moxidectina 1% em ovinos naturalmente infectados. Foram selecionados 24 ovinos para a composição de três grupos experimentais com oito animais cada: T1, ovinos tratados com a associação albendazole, levamisole e ivermectina, na dosagem de 1 mL 4 kg -1 de peso corporal; T2, ovinos tratados com moxidectina, na dosagem de 1 mL 50 kg -1 de peso corporal e T3, ovinos sem tratamento antihelmíntico. Foram realizadas contagens de ovos por grama de fezes (OPG) no primeiro, terceiro, quinto e sétimo dia após os tratamentos. No sétimo dia todos os ovinos foram necropsiados e todos os helmintos encontrados no trato gastrintestinal foram quantificados e identificados quanto ao gênero e à espécie. A associação dos diferentes princípios ativos foi 100% eficaz no combate às espécies Cooperia punctata, C. pectinata, C. spatulata, Trichostrongylus axei, Oesophagostomum columbianum, Trichuris ovis, C. curticei e Strongyloides papillosus e, a moxidectina eliminou as seis primeiras espécies citadas. Contra Haemonchus contortus a associação apresentou eficácia superior (93%) à moxidectina (51,4%). Ambas formulações foram eficazes contra Trichostrongylus colubriformis. A associação medicamentosa utilizada constitui alternativa no controle das nematodioses ovinas.Termos para indexação: anti-helmínticos, controle, nematodiose ovina. Comparative anthelmintic efficacy of the association albendazol, levamisol and ivermectin to moxidectin in sheepAbstract -The anthelmintic efficacy of 2.0% albendazol, 2.55% levamisol chloridrate and 0.08% ivermectin formulation to 1% moxidectin in sheep naturally infected with gastrointestinal nematodes was compared. Twentyfour animals were selected by faecal egg counts (FEC) means, composing three experimental groups with eight sheep each: T1, sheep treated with albendazol, levamisol and ivermectin association; T2, sheep treated with 1% moxidectin and T3, untreated group. FEC was estimated at 1 st , 3 rd , 5 th and 7 th day post-treatment. All animals were slaughtered at 7 th day post-treatment to quantify and identify the nematode burden. The association was 100% effective against eight of ten helminth species (Cooperia punctata, C. pectinata, C. curticei, C. spatulata, Strongyloides papillosus, Trichostrongylus axei, Oesophagostomum columbianum and Trichuris ovis), while the moxidectin removed only six of these species. It also had superior efficacy against Haemonchus contortus (93%) when compared to the 1% moxidectin (51.4%). Both formulations showed similar efficacy against Trichostrongylus colubriformis. Therefore, the anthelmintic association can be an alternative on sheep nematodiosis control.Index terms: anthelminthics, control, sheep nematodiosis. IntroduçãoVerminoses representam o maior e mais grave problema sanitário concernente à ovinocultura, e podem inviabilizar economicamente a criação. Ovinos em todas as faixas etárias são parasitados por hel...

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Section: Resultsunclassified

Eficácia anti-helmíntica comparativa da associação albendazole, levamisole e ivermectina à moxidectina em ovinos

Buzzulini

Sobrinho

Costa

et al. 2007

Pesq. agropec. bras.

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“…In this study, the option of cattle grazing prior to sheep was selected due to the fact that cattle may eat tip larvae thereby reducing the grass parasite load. Infective larvae of sheep parasites are destroyed when ingested by cattle (Amarante et al, 1997;Torres et al, 2009). …”

Section: Resultsmentioning

confidence: 99%

Dry matter intake, performance and carcass characteristics of hair sheep reared under different grazing systems

Santos

McManus

Peripolli

et al. 2017

Sci. agric. (Piracicaba, Braz.)

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The aim of this study was to evaluate the effect of three different grazing systems: isolated, alternate and simultaneous, on feed intake, performance and carcass characteristics of sheep. About 5.2 ha area of Tanzania grass (Panicum maximun Jacq cultivate Tanzania) was divided into 13 paddocks. This area was used as a stocking rate of two animal units (AU) per ha for 7 days' occupation and 21 days rest. A total number of 58 animals were used consisting of 12 heifers and 30 Santa Ines lambs with the addition of 16 adult ewes that were used to stabilize grazing pressure in the isolated system. The sheep were fed on 200 g per head per day of concentrate and cattle 2 kg per head per day. The parameters determined were the following:weekly weight (WW), total live weight gain (LWG) and mean daily weight gain (MDW). Also dry matter intake was estimated 84 days after the start of the experiment using external indicators (Purified and Enriched Lignin) in addition to carcass traits and composition which were also estimated. The result obtained for carcass composition revealed that the muscle:bone ratio and bone percentage were better in the alternate system. Moreover, the simultaneous and isolated systems showed higher lamb performance than the alternate system, while there was no effect on dry matter intake. Furthermore, there was no difference of the different systems on carcass traits and feed intake of sheep. Nevertheless, the simultaneous grazing system showed better sheep performance than the alternate grazing system.

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“…A 5% aliquot was preserved in 5% formalin for subsequent enumeration and identification of nematodes into genus based on their morphology (Amarante et al, 1997;Ueno and Gonçalves, 1998). All adult males present in the aliquots were identified to species based on the morphology of their spicules.…”

Section: Parasitologymentioning

confidence: 99%

Field study on nematode resistance in Nelore-breed cattle

Bricarello

Zaros

Coutinho

et al. 2007

Veterinary Parasitology

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The present study evaluated Nelore cattle with different degrees of resistance to natural infections by gastrointestinal nematodes. One hundred weaned male cattle, 11-12 months of age, were kept on the same pasture and evaluated from October 2003 to February 2004. Faecal and blood samples were collected for parasitological, haematological and immunological tests. In February 2004, the 10 most resistant and the 10 most susceptible animals were selected based on individual means of nematode faecal egg counts (FEC). Such animals were slaughtered for worm burden determination and nematode species identification. The repeatability estimates for FEC (AES.D.), log-transformed FEC and packed-cell volume (PCV) in all animals were 0.3 (AE0.05), 0.26 (AE0.04) and 0.42 (AE0.05), respectively. The resistant group showed lower FEC and worm burdens than the susceptible group (P < 0.05). There were no significant differences between groups regarding mean body weight, weight gain, PCV and total serum protein values (P > 0.05). The resistant group showed higher total serum IgE levels (P < 0.05) and higher mean eosinophil blood counts. However, the latter was statistically significant only 42 days after the beginning of the study. Nematodes Cooperia punctata and Haemonchus placei were predominant and the correlation between Cooperia and Haemonchus burdens was 0.64 (P < 0.05), which indicated that animals presenting increased numbers of one of those genera probably had increased numbers of the other. The current study provides further evidence of IgE active role in nematode immunity and suggests that total serum IgE level might serve as an additional marker to select Nelore cattle that are responsive to H. placei and C. punctata infections.

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Host specificity of sheep and cattle nematodes in São Paulo state, Brazil

Cited by 93 publications

References 22 publications

Eficácia anti-helmíntica comparativa da associação albendazole, levamisole e ivermectina à moxidectina em ovinos

Eficácia anti-helmíntica comparativa da associação albendazole, levamisole e ivermectina à moxidectina em ovinos

Dry matter intake, performance and carcass characteristics of hair sheep reared under different grazing systems

Field study on nematode resistance in Nelore-breed cattle

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