caa a22 4500 386388237 CHVBK 20180307112105.0 cr unu---uuuuu 161130e198906 xx s 000 0 eng 10.1017/S0022149X00008865 doi S0022149X00008865 pii (NATIONALLICENCE)cambridge-10.1017/S0022149X00008865 Attempts to control infection with Ostertagia ostertagi (Trichostrongylidae) in grazing calves by adding mycelium of the nematode-trapping fungus Arthrobotrys oligospora (Hyphomycetales) to cow pats [Elektronische Daten] Artificially prepared cow pats containing Ostertagia ostertagi eggs were deposited on two comparable grazing plots at weekly intervals during June and July 1987. Before deposition the cow pats, on the one plot, were inoculated with 0·250 g mycelial fragments per kg of faeces of the predacious fungus Arthrobotrys oligospora. On the other control plot comparable numbers of non-inoculated cow pats were placed at the same time. Subsequently, in July, two equal groups of calves were turned out one on each plot to graze for two months after which they were necropsied. The number of infective O. ostertagi larvae in inoculated cow pats was reduced by 42% and herbage larval infectivity around them by 50-71% as compared with the corresponding parameters in control pats and surrounding herbage. After a grazing period of two months the calves on the plot with inoculated cow pats had acquired worm burdens that were on average 37% lower than those of calves on the control plot. The lower degree of parasitism in these calves was also reflected in lower egg counts, lower serum pepsinogen levels and higher body weight. Copyright © Cambridge University Press 1989 Ostertagia ostertagi nationallicence Arthrobotrys oligospora nationallicence Trichostrongylidae nationallicence nematode-trapping fungi nationallicence control nationallicence cow pats nationallicence ecology nationallicence cattle nationallicence Denmark nationallicence Grønvold J. Royal Veterinary and Agricultural University, Institute of Hygiene and Microbiology, 13, Bülowsvej, DK-1870 Frederiksberg C, Denmark Henriksen S. A. National Veterinary Laboratory, 27, Bülowsvej, DK-1870 Frederiksberg C, Denmark Nansen P. Royal Veterinary and Agricultural University, Institute of Hygiene and Microbiology, 13, Bülowsvej, DK-1870 Frederiksberg C, Denmark Wolstrup J. Royal Veterinary and Agricultural University, Institute of Microbiology, 21, Rolighedsvej, DK-1958 Frederiksberg C, Denmark Thylin J. Chr. Hansen's Bio Systems, 10-12, Bøge Alle, DK-2970 Hørsholm, Denmark Journal of Helminthology Cambridge University Press 63/2(1989-06), 115-126 0022-149X 63:2<115 1989 63 JHL https://doi.org/10.1017/S0022149X00008865 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0022149X00008865 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Grønvold J. Royal Veterinary and Agricultural University, Institute of Hygiene and Microbiology, 13, Bülowsvej, DK-1870 Frederiksberg C, Denmark NATIONALLICENCE 700 1- Henriksen S. A. National Veterinary Laboratory, 27, Bülowsvej, DK-1870 Frederiksberg C, Denmark NATIONALLICENCE 700 1- Nansen P. Royal Veterinary and Agricultural University, Institute of Hygiene and Microbiology, 13, Bülowsvej, DK-1870 Frederiksberg C, Denmark NATIONALLICENCE 700 1- Wolstrup J. Royal Veterinary and Agricultural University, Institute of Microbiology, 21, Rolighedsvej, DK-1958 Frederiksberg C, Denmark NATIONALLICENCE 700 1- Thylin J. Chr. Hansen's Bio Systems, 10-12, Bøge Alle, DK-2970 Hørsholm, Denmark NATIONALLICENCE 773 0- Journal of Helminthology Cambridge University Press 63/2(1989-06), 115-126 0022-149X 63:2<115 1989 63 JHL CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge