Relação entre desempenho e infecções por nematódeos gastrintestinais em bovinos Nelore em crescimento

Nicolau, Cátia; Amarante, Alessandro Francisco Talamini do; Rocha, Gilberto Pedroso da; Godoy, Wesley Augusto Conde

doi:10.1590/s0102-09352002000400004

Cited by 11 publications

(10 citation statements)

References 23 publications

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“…Such over-dispersed pattern was clearly observed in the present study corroborating a previous experiment using Nelore young cattle (Nicolau et al, 2002).…”

Section: Discussionsupporting

confidence: 93%

“…punctata and H. placei were the predominant parasites found in cattle, which agrees with previous studies carried out in Brazil (Guimarães et al, 1990;Lima, 1998;Nicolau et al, 2002) and in other tropical countries (Durie, 1962;Bryan and Kerr, 1989). Correlation coefficients between those parasites were positive, demonstrating that animals with increased numbers of one genus probably had increased numbers of the other.…”

Section: Discussionsupporting

confidence: 91%

“…The repeatability value obtained for FEC (0.3) was similar to the values found by Stear et al (2000) in sheep and by Mackinnon et al (1991) in crossbred Zebu and Nicolau et al (2002) in Nelore cattle naturally infected with nematodes. Repeatability for PCV (0.42) could be considered moderate and thus could be used together with the FEC to monitor nematode infections.…”

Section: Discussionsupporting

confidence: 83%

“…Similarly, Nicolau et al (2002) did not notice any association among those variables in naturally infected Nelore cattle. In another study carried out in Australia using crossbred Zebu animals, there was a low correlation between resistance to parasites and growth (Mackinnon et al, 1991).…”

Section: Discussionmentioning

confidence: 68%

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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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“…Such over-dispersed pattern was clearly observed in the present study corroborating a previous experiment using Nelore young cattle (Nicolau et al, 2002).…”

Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 68%

See 2 more Smart Citations

Field study on nematode resistance in Nelore-breed cattle

Bricarello

Zaros

Coutinho

et al. 2007

Veterinary Parasitology

Self Cite

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“…Cabe ressaltar que os helmintos diminuem a digestibilidade dos nutrientes, levando a síndrome da má absorção, acarretando baixo ganho de peso e retardo no desempenho dos animais (Nicolau et al, 2002). Uma nutrição adequada contribui para aumentar a resistência dos animais contra o parasitismo e minimizar os efeitos de infecções secundárias.…”

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Gastrointestinal parasites in dairy cows present in farm show in western Santa Catarina, Brazil

Soldá

Silva

Glombowsky

et al. 2016

AVB

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RESUMO -O objetivo desse estudo foi avaliar a ocorrência de parasitos gastrintestinais nos bovinos leiteiros participantes de feiras agropecuárias no oeste catarinense, com o intuito de conhecer a situação dos animais expostos nestes eventos. Durante três feiras de grande expressão da região oeste do estado de Santa Catarina, ocorridas nos anos de 2013 e 2014, foram coletadas 153 amostras de fezes de animais expostos, as quais foram analisadas pela técnica de McMaster para verificar o número de ovos por grama de fezes (OPG). Nos exames realizados, diagnosticou-se 69 amostras positivas para parasitos (45%), isto é, helmintos, coccídeos ou infecções mistas por ovos de helmintos da ordem Strongylida e oocistos de Eimeria spp. Os ovos da família Strongylida foram identificados como sendo dos parasitos Trichostrongylus spp., Haemonchus spp., Teladorsagia spp., Cooperia spp., e Oesophagostomun spp. Portanto, os bovinos presentes em feiras agropecuárias, apesar do controle sanitário requerido e alguns casos mesmo com tratamento prévio, apresentam infecção por parasitos gastrointestinais.Palavras-Chave: bovinos; helmintos; parasitismo; sanidade animal. ABSTRACT -The aim of this study was to evaluate the incidence of gastrointestinal parasites in dairy cattle participants of farm show in western Santa Catarina, in order to know the situation of the animals exposed in these events. In three fairs of great expression of the western region of the state of Santa Catarina, that occurred in the years 2013 and 2014, were collected 153 samples feces of animal exposed, which were analyzed by the McMaster technique to check the number of eggs per gram of feces (EPG). In the tests performed, was diagnosed 69 samples positive for parasites (45%), i.e., helminth eggs, coccidia oocysts, or mixed infections by helminthes (Strongylida order) and coccidia (Eimeria spp). Eggs Strongylidae family were identified as the parasites Trichostrongylus spp., Haemonchus spp., Teladorsagia spp., Cooperia spp., and Oesophagostomun spp. Therefore, cattle present in farm show, despite the required sanitary control and in some cases even with previous treatment, have infection gastrointestinal parasites.

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Gastrointestinal nematode infection in beef cattle raised in silvopastoral and conventional systems in São Paulo state, Brazil

et al. 2016

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The use of silvopastoral systems (SPS) can be a good alternative to reduce the environmental impacts of livestock breeding in Brazil. Despite the advantages offered by public policies, many producers hesitate to use this system. One of the reasons is the lack of information on health and productivity of cattle raised under these conditions. The experiment reported here was designed to compare the behavior of infection by gastrointestinal nematodes and weight gain of beef cattle raised in a SPS and a conventional pasture system. We monitored the number of eggs per gram of feces, the prevalent nematode genus, data on climate, forage availability, weight gain and packed cell volume (PCV) of the animals bred in the two systems. The infection by nematodes was significantly higher in the cattle raised in the SPS (p \ 0.05). The coprocultures revealed the presence of nematodes of the genera Haemonchus, Cooperia, Oesophagostomum and Trichostrongylus, in both systems, but the mean infestation rates of Haemonchus and Cooperia were higher in the SPS (p \ 0.05). The average of PCV values did not differ between the cattle in the two systems. The individual weight gain and stocking rate in the period did not vary between the systems (p [ 0.05). Despite the higher prevalence of nematodes in the SPS, no negative impact was detected on the animals' weight gain and health. The results of this experiment indicate that under the conditions studied, there is no need to alter the parasite management to assure good productive performance of cattle.

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Relação entre desempenho e infecções por nematódeos gastrintestinais em bovinos Nelore em crescimento

Cited by 11 publications

References 23 publications

Field study on nematode resistance in Nelore-breed cattle

Field study on nematode resistance in Nelore-breed cattle

Gastrointestinal parasites in dairy cows present in farm show in western Santa Catarina, Brazil

Gastrointestinal nematode infection in beef cattle raised in silvopastoral and conventional systems in São Paulo state, Brazil

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