Duddingtonia flagrans, Monacrosporium thaumasium and Pochonia chlamydosporia as possible biological control agents of Oxyuris equi and Austroxyuris finlaysoni

The action of four fungal isolates of the species Duddingtonia flagrans (AC001), Monacrosporium thaumasium (NF34a) and Pochonia chlamydosporia (VC1 and VC4) on eggs of Oxyuris equi and Austroxyuris finlaysoni was evaluated in two assays (A and B). Eggs of O. equi (Test A) and A. finlaysoni (Test B)...

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Published in:Journal of helminthology 2010-03, Vol.84 (1), p.21-25
Main Authors: Braga, F.R., Araújo, J.V., Silva, A.R., Araujo, J.M., Carvalho, R.O., Campos, A.K., Tavela, A.O., Ferreira, S.R., Frassy, L.N., Alves, C.D.F.
Format: Article
Language:English
Subjects:
Animals
Ascomycota - physiology
Biological and medical sciences
Diseases caused by nematodes
Duddingtonia flagrans
Female
Fundamental and applied biological sciences. Psychology
Helminthic diseases
Host parasite relation
pathogenicity
Hypocreales - physiology
Infectious diseases
Invertebrates
Male
Medical sciences
Miscellaneous
Monacrosporium
Nemathelminthia. Plathelmintha
Nematoda
Nematoda - microbiology
Nematoda - physiology
Ovum - microbiology
Ovum - physiology
Parasitic diseases
Pest Control, Biological - methods
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Summary:The action of four fungal isolates of the species Duddingtonia flagrans (AC001), Monacrosporium thaumasium (NF34a) and Pochonia chlamydosporia (VC1 and VC4) on eggs of Oxyuris equi and Austroxyuris finlaysoni was evaluated in two assays (A and B). Eggs of O. equi (Test A) and A. finlaysoni (Test B) were plated on Petri dishes with 2% water-agar with grown fungal isolates and control without fungus. After 5, 10 and 15 days, 100 eggs were collected and classified according to the following parameters: type 1 effect, physiological and biochemical effect without morphological damage to the eggshell; type 2 effect, lytic effect with morphological alteration of the eggshell and embryo; and type 3 effect, lytic effect with morphological alteration of the eggshell and embryo, hyphal penetration and internal egg colonization. Pochonia chlamydosporia isolates VC1 and VC4 showed ovicidal activity for type 1, 2 and 3 effects on eggs of O. equi and eggs of A. finlaysoni. In vitro assays A and B showed that P. chlamydosporia had a negative influence on eggs of O. equi and A. finlaysoni and can be considered as a potential biological control agent of nematodes.
ISSN:0022-149X
1475-2697
DOI:10.1017/S0022149X09990034