Interaction between the nematophagous fungus Duddingtonia flagrans and infective larvae of Haemonchus contortus (Nematoda: Trichostrongyloidea)

The interaction between Duddingtonia flagrans and infective larvae of Haemonchus contortus was studied in vitro under optical and scanning electron microscopy. Trap formation by the fungus started 9 hours after inoculation and first larvae were found 11 hours after larval inoculation on colonies gro...

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Bibliographic Details
Published in:Journal of helminthology 2008-12, Vol.82 (4), p.337-341
Main Authors: Campos, A.K., Araújo, J.V., Guimarães, M.P.
Format: Article
Language:English
Subjects:
Adhesives
Animal and plant ecology
Animal cuticle
Animal, plant and microbial ecology
Animals
Ascomycota - physiology
Ascomycota - ultrastructure
Autoecology
Biological and medical sciences
Colonies
Cuticles
Dialysis
Duddingtonia flagrans
Electron micrographs
Electron microscopes
Electron microscopy
Epicuticle
Feces - parasitology
Fundamental and applied biological sciences. Psychology
Fungi
Goat Diseases - parasitology
Goats - microbiology
Goats - parasitology
Haemonchiasis - microbiology
Haemonchiasis - prevention & control
Haemonchiasis - veterinary
Haemonchus - microbiology
Haemonchus - ultrastructure
Haemonchus contortus
Hemodialysis
Hyphae
Inoculation
Interspecific relationships
Intestinal Diseases, Parasitic - microbiology
Intestinal Diseases, Parasitic - veterinary
Larva
Larvae
Membranes
Micrography
Microscopy, Electron, Scanning
Nematoda
Nematodes
Nematophagous fungi
Parasites
Parasitology - methods
Pest Control, Biological - methods
Predation
Protozoa. Invertebrata
Scanning electron microscopy
Trichostrongyloidea
Worms
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Description
Summary:The interaction between Duddingtonia flagrans and infective larvae of Haemonchus contortus was studied in vitro under optical and scanning electron microscopy. Trap formation by the fungus started 9 hours after inoculation and first larvae were found 11 hours after larval inoculation on colonies grown on the surface of dialysis membranes. Scanning electron micrographs were taken 12, 24, 36 and 48 h after larval predation. Details of predation structures and fungus–larvae interaction are described. A mucilaginous substance occurred at the points of adherence of traps to nematode cuticle. Bacteria were also found at some points of interaction between fungus and larval cuticle. Cuticle penetration by fungus hyphae occurred only 48 h after predation.
ISSN:0022-149X
1475-2697
DOI:10.1017/S0022149X08032203