Helminth infections on organic dairy farms in Spain
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Helminth infections on organic dairy farms in Spain. / Orjales, I.; Mezo, M.; Miranda, M.; Gonzalez-Warleta, M.; Rey-Crespo, F.; Vaarst, M.; Thamsborg, S.; Dieguez, F. J.; Castro-Hermida, J. A.; Lopez-Alonso, M.
I: Veterinary Parasitology, Bind 243, 2017, s. 115-118.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Helminth infections on organic dairy farms in Spain
AU - Orjales, I.
AU - Mezo, M.
AU - Miranda, M.
AU - Gonzalez-Warleta, M.
AU - Rey-Crespo, F.
AU - Vaarst, M.
AU - Thamsborg, S.
AU - Dieguez, F. J.
AU - Castro-Hermida, J. A.
AU - Lopez-Alonso, M.
PY - 2017
Y1 - 2017
N2 - The aim of this study was to assess the prevalence of the major helminth infections affecting organic dairy cattle in northern Spain. Milk and faecal samples were obtained from 443 milking cows. Ostertagia ostertargi and Fasciola hepatica exposure was assessed by detection of specific antibodies in milk samples and F. hepatica infection was diagnosed by the detection of coproantigens in faecal samples. Dictyocaulus viviparus and Calicophoron daubneyi infections were diagnosed by conventional coprological techniques. The prevalence of infections caused by F. hepatica was considerable low, but similar to data reported from conventional farming in the same area. The prevalence rate of C. daubneyi infection was higher than previous data mirroring an increase of the prevalence that was also reported in other European countries in recent years. Specific antibodies against O. ostertargi were detected in all herds and the median levels of antibodies, determined by ELISA, exceeded the thresholds indicating milk production losses. The prevalence of D. viviparus was almost negligible. For each parasite, an ordinal logistic-regression analysis was used to assess the risk of infection by taking into account the administration of effective anthelmintics and the number of lactations. Treatment of cows with fasciolicides decreased the risk of F. hepatica infection in multiparous cows, whereas treatment with oxiclozanide or albendazol did not decrease the risk of C. daubneyi infection or O. ostertargi exposure, respectively. The study findings demonstrate that helminth infection in organic dairy farming is similar or even lower than previous data reported from conventional farming. Special attention should be paid to the impact of these infections on milk production.
AB - The aim of this study was to assess the prevalence of the major helminth infections affecting organic dairy cattle in northern Spain. Milk and faecal samples were obtained from 443 milking cows. Ostertagia ostertargi and Fasciola hepatica exposure was assessed by detection of specific antibodies in milk samples and F. hepatica infection was diagnosed by the detection of coproantigens in faecal samples. Dictyocaulus viviparus and Calicophoron daubneyi infections were diagnosed by conventional coprological techniques. The prevalence of infections caused by F. hepatica was considerable low, but similar to data reported from conventional farming in the same area. The prevalence rate of C. daubneyi infection was higher than previous data mirroring an increase of the prevalence that was also reported in other European countries in recent years. Specific antibodies against O. ostertargi were detected in all herds and the median levels of antibodies, determined by ELISA, exceeded the thresholds indicating milk production losses. The prevalence of D. viviparus was almost negligible. For each parasite, an ordinal logistic-regression analysis was used to assess the risk of infection by taking into account the administration of effective anthelmintics and the number of lactations. Treatment of cows with fasciolicides decreased the risk of F. hepatica infection in multiparous cows, whereas treatment with oxiclozanide or albendazol did not decrease the risk of C. daubneyi infection or O. ostertargi exposure, respectively. The study findings demonstrate that helminth infection in organic dairy farming is similar or even lower than previous data reported from conventional farming. Special attention should be paid to the impact of these infections on milk production.
KW - Cattle
KW - Grazing
KW - Organic milk production
KW - Helminth infections
U2 - 10.1016/j.vetpar.2017.06.031
DO - 10.1016/j.vetpar.2017.06.031
M3 - Journal article
C2 - 28807278
VL - 243
SP - 115
EP - 118
JO - Veterinary Parasitology
JF - Veterinary Parasitology
SN - 0304-4017
ER -
ID: 183801030