Ciatostomíneos (Strongylidae-Cyathostominae) parásitas de cávalos: Ecología experimental dos estágios pré-parasíticos em gramínea tifton 85 (Cynodon spp. cv. Tifton 85) na baixada Fluminense, RJ, Brasil

Bezerra, Simone Q; Couto, Melissa Carvalho Machado do; Souza, Tarcísio Moura De; Beviláqua, Cláudia Maria Leal; Anjos, Débora Henrique da Silva; Sampaio, Ivan Barbosa Machado; Rodrigues, E.M.

doi:10.4067/s0717-77122007000100005

Cited by 7 publications

(9 citation statements)

References 13 publications

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“…Higher average recovery of L 3 from the stool (165,400 kg -1 DM) and grass samples (14,700 and 13,200 L 3 .kg -1 DM in the GA and GB, respectively) during the dry season was probably due to ideal temperature conditions and low rainfall. These findings agree with those reported by Langrová et al (2003), Bezerra et al (2007), Nielsen et al (2007), Quinelato et al (2008) and Santos et al (2011). Fecal masses play an important role in the development of eggs and larvae, acting as reservoirs for larvae, as observed by Mfitilodze and Hutchinson (1987), Uhlinger (1991), Bezerra et al (2007) and Santos et al (2011).…”

Section: Discussionsupporting

confidence: 78%

“…These findings agree with those reported by Langrová et al (2003), Bezerra et al (2007), Nielsen et al (2007), Quinelato et al (2008) and Santos et al (2011). Fecal masses play an important role in the development of eggs and larvae, acting as reservoirs for larvae, as observed by Mfitilodze and Hutchinson (1987), Uhlinger (1991), Bezerra et al (2007) and Santos et al (2011). With adequate humidity and temperature, horses can become infected immediately after rainfall, but these animals in this area are more exposed to infection during dry than heavy rainfall periods (BEZERRA et al, 2007;QUINELATO et al, 2008;COUTO et al, 2008;COUTO et al, 2009;RODRIGUES et al, 2008).…”

Section: Discussionsupporting

confidence: 78%

“…2 g) and grass samples around the site where the four fecal samples were deposited were collected seven days later and every fifteen days afterward, always at 8:00 AM for recovery of larvae from the grass, the samples were divided into base (GB = 0-10 cm) and apex (GA = 10-20 cm). Stool samples were weighed and grass was processed by Bezerra et al (2007) technique. Stool and grass samples were immersed into water at room temperature and left to rest for 24 hours, after which a 5 mL solution was collected containing cyathostomin larvae, which were identified and counted.…”

Section: Methodsmentioning

confidence: 99%

“…Climatic conditions influence the development and survival of cyathostomins affecting parasite loads (BEZERRA et al, 2007;QUINELATO et al, 2008). Thus, there is a need to know the epidemiology of these parasites and their interaction with the host to establish effective control strategies.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, there is a need to know the epidemiology of these parasites and their interaction with the host to establish effective control strategies. Studies of the prevalence of cyathostomin larvae in pastures using different grasses have been performed in Brazil by Bezerra et al (2007) (Tifton 85), Couto et al (2009) (Coast cross) and Santos et al (2011) (Brachiaria humidicola). It is essential to find alternative control methods to minimize the use of anthelmintics due to cyathostomin resistance to different groups of chemicals.…”

Section: Introductionmentioning

confidence: 99%

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Cyathostomin larvae: presence on Brachiaria humidicola grass during the rainy and dry seasons of Brazil

Santos

Souza

Vieira

et al. 2012

Rev. Bras. Parasitol. Vet.

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The presence of cyathostomin larvae is directly associated to climatic conditions of each region. This study aimed to evaluate the ecology of infective larvae on Brachiaria humidicola during the dry and rainy seasons from October 2007 to September 2008 in a tropical region, Rio de Janeiro state, southeastern Brazil. Stools were collected from the rectum of horses naturally infected with cyathostomins at the beginning of the rainy season (October to March) and dry season (April to September). They were divided into four samples of 500 g and deposited on a grass patch of B. humidicola. Seven days later and every 15 days thereafter samples of feces and grass were collected and processed by the Baermann technique. The mean number of larvae recovered from the grass varied according to the season, with greater recovery of larvae during the peak of the dry season (14,700 L 3 .kg -1 DM). There was a statistically significant difference between L 3 recovered from feces and grass, but not between L 3 recovered from the grass base and apex. These results show that the region's climate favors the development and survival of infective cyathostomin larvae throughout the year, with a greater number of larvae during the dry season.Keywords: Infective larvae, wet and dry seasons, Brachiaria humidicola, cyathostomin. ResumoA disponibilidade de larvas de ciatostomíneos está diretamente relacionada com as condições climáticas de cada região. Para avaliar o comportamento das larvas infectantes nos períodos seco e chuvoso em gramínea Brachiaria humidicola, realizou-se um estudo, no período de outubro/2007 a setembro/2008, na região da Baixada Fluminense, RJ, de clima tropical. Amostras de fezes foram coletadas diretamente do reto de equinos naturalmente infectados por ciatostomíneos, no início do período chuvoso (outubro a março) e seco (abril a setembro), divididas em quatro amostras de 500 g e depositadas em um canteiro formado por gramínea B. humidicola. Sete dias após o depósito e, posteriormente, a cada 15 dias, amostras de fezes e gramíneas, foram coletadas às 8 horas e processadas pela técnica de Baermann. O número médio de larvas recuperadas da gramínea variou conforme os períodos, ocorrendo maior recuperação no ápice do período seco (14.700 L 3 .kg -1 . MS). Diferença significativa ocorreu entre a contagem de L 3 recuperadas das fezes e gramínea e não significativa entre as de L 3 recuperadas nas duas alturas da gramínea. Concluiu-se que as condições climáticas da região favorecem o desenvolvimento e a sobrevivência de larvas infectantes de ciatostomíneos durante todo o ano, com maior disponibilidade no período seco.Palavras-chave: Larvas infectantes, períodos chuvoso e seco, Brachiaria humidicola, ciatostomíneos.

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Section: Discussionsupporting

confidence: 78%

Section: Discussionsupporting

confidence: 78%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cyathostomin larvae: presence on Brachiaria humidicola grass during the rainy and dry seasons of Brazil

Santos

Souza

Vieira

et al. 2012

Rev. Bras. Parasitol. Vet.

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Biological control of horse cyathostomin (Nematoda: Cyathostominae) using the nematophagous fungus Duddingtonia flagrans in tropical southeastern Brazil

Braga

Araújo

Silva

et al. 2009

Veterinary Parasitology

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The viability of a fungal formulation using the nematode-trapping fungus Duddingtonia flagrans was assessed for the biological control of horse cyathostomin. Two groups (fungus-treated and control without fungus treatment), consisting of eight crossbred mares (3-18 years of age) were fed on Cynodon sp. pasture naturally infected with equine cyathostome larvae. Each animal of the treated group received oral doses of sodium alginate mycelial pellets (1g/(10 kg live weight week)), during 6 months. Significant reduction (p<0.01) in the number of eggs per gram of feces and coprocultures was found for animals of the fungus-treated group compared with the control group. There was difference (p<0.01) of 78.5% reduction in herbage samples collected up to (0-20 cm) between the fungus-treated group and the control group, during the experimental period (May-October). Difference of 82.5% (p<0.01) was found between the fungus-treated group and the control group in the sampling distance (20-40 cm) from fecal pats. During the last 3 months of the experimental period (August, September and October), fungus-treated mares had significant weight gain (p<0.01) compared with the control group, an increment of 38 kg. The treatment with sodium alginate pellets containing the nematode-trapping fungus D. flagrans reduced cyathostomin in tropical southeastern Brazil and could be an effective tool for biological control of this parasitic nematode in horses.

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Applicability of FLOTAC® technique in recovering equine strongyle larvae in the pasture: A comparison study

Ramos

Lima

et al. 2018

Veterinary Parasitology

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Ciatostomíneos (Strongylidae-Cyathostominae) parásitas de cávalos: Ecología experimental dos estágios pré-parasíticos em gramínea tifton 85 (Cynodon spp. cv. Tifton 85) na baixada Fluminense, RJ, Brasil

Abstract: CYATHOSTOMINAE (STRONGYLIDAE-CYATHOSTOMINAE) HORSE PARASITES: EXPERIMENTAL ECOLOGY OF FREE LIVING STAGES ON PASTURE

Cited by 7 publications

References 13 publications

Cyathostomin larvae: presence on Brachiaria humidicola grass during the rainy and dry seasons of Brazil

Cyathostomin larvae: presence on Brachiaria humidicola grass during the rainy and dry seasons of Brazil

Biological control of horse cyathostomin (Nematoda: Cyathostominae) using the nematophagous fungus Duddingtonia flagrans in tropical southeastern Brazil

Applicability of FLOTAC® technique in recovering equine strongyle larvae in the pasture: A comparison study

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