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The ability of the nematode-trapping fungus Duddingtonia flagrans to reduce the transmission of

Published online by Cambridge University Press:  11 April 2024

A.S. Fernández ,
M. Larsen ,
P. Nansen ,
E. Henningsen ,
J. Grønvold ,
J. Wolstrup ,
S.A. Henriksen  and
H. Bjørn
A.S. Fernández*
Affiliation:
Danish Centre for Experimental Parasitology, Royal Veterinary and Agricultural University, 3 Ridebanevej, DK-1870, Frederiksberg C, Denmark: Área de Parasitología y Enfermedades Parasitarias, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Provincia de Buenos Aires, Pje. Arroyo Seco s/n, 7000,- Tandil, Argentina
M. Larsen
Affiliation:
Danish Centre for Experimental Parasitology, Royal Veterinary and Agricultural University, 3 Ridebanevej, DK-1870, Frederiksberg C, Denmark:
P. Nansen
Affiliation:
Danish Centre for Experimental Parasitology, Royal Veterinary and Agricultural University, 3 Ridebanevej, DK-1870, Frederiksberg C, Denmark:
E. Henningsen
Affiliation:
Danish Centre for Experimental Parasitology, Royal Veterinary and Agricultural University, 3 Ridebanevej, DK-1870, Frederiksberg C, Denmark:
J. Grønvold
Affiliation:
Danish Centre for Experimental Parasitology, Royal Veterinary and Agricultural University, 3 Ridebanevej, DK-1870, Frederiksberg C, Denmark: Section of Zoology
J. Wolstrup
Affiliation:
Danish Centre for Experimental Parasitology, Royal Veterinary and Agricultural University, 3 Ridebanevej, DK-1870, Frederiksberg C, Denmark: Section of Microbiology, Department of Ecology and Molecular Biology, Royal Veterinary and Agricultural University, 40 Thorvaldsensvej, DK-1871, Frederiksberg C, Denmark
S.A. Henriksen
Affiliation:
Danish Centre for Experimental Parasitology, Royal Veterinary and Agricultural University, 3 Ridebanevej, DK-1870, Frederiksberg C, Denmark: Danish Veterinary Laboratory, 27 Bülowsvej, DK-1790, Copenhagen V, Denmark
H. Bjørn
Affiliation:
Danish Centre for Experimental Parasitology, Royal Veterinary and Agricultural University, 3 Ridebanevej, DK-1870, Frederiksberg C, Denmark: Danish Veterinary Laboratory, 27 Bülowsvej, DK-1790, Copenhagen V, Denmark
*
*Fax: +45 3528 2774E-mail: asf@kvl.dk
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Abstract

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The ability of two isolates of the nematode-trapping fungus Duddingtonia flagrans to reduce the numbers of gastrointestinal nematode larvae on herbage was tested in three plot studies. Artificially prepared cow pats containing Ostertagia ostertagi eggs, with and without fungal spores, were deposited on pasture plots two or three times during the grazing season in 1995, 1996 and 1997. The herbage around each pat was sampled fortnightly over a period of 2 months and the number of infective larvae was recorded. At the end of the sampling period, the remainder of the faecal pats was collected to determine the wet weight, dry weight, and content of organic matter. The infective larvae remaining in the pats were extracted. Faecal cultures showed that both fungal isolates significantly reduced the number of infective larvae. Significantly fewer larvae were recovered from herbage surrounding fungus-treated pats compared with control pats in all three experiments, reflecting the ability of the fungus to destroy free-living larval stages in the faecal pat environment. After 8 weeks on pasture there were no differences between control and fungus-treated pats with respect to wet weight, dry weight, and organic matter content. This indicates that the degradation of faeces was not negatively affected by the presence of the fungus.

Type
Review Article
Information
Journal of Helminthology , Volume 73 , Issue 2 , February 1999 , pp. 115 - 122
Copyright
Copyright © Cambridge University Press 1999

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