Aspects of the Host-Parasite Relationship of Plant-Parasitic Nematodes

1975 ◽  
pp. 225-250 ◽  
Author(s):  
J.M. Webster
Keyword(s):  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Host Parasite Relationship ◽  
Parasite Relationship ◽  
Host Parasite ◽  
Relationship Of ◽  
Plant Parasitic

The influence of the actionmycete,Pasteuria penetrans, on the host–parasite relationship of the plant-parasitic nematode,Meloidogyne javanica

Parasitology ◽  
1986 ◽  
Vol 93 (3) ◽  
pp. 571-580 ◽  
Author(s):  
A. F. Bird
Keyword(s):  
Giant Cells ◽  
Parasitic Nematodes ◽  
Pasteuria Penetrans ◽  
Root Knot Nematode ◽  
Plant Host ◽  
Parasite Relationship ◽  
Short Time ◽  
Host Parasite ◽  
Relationship Of ◽  
Plant Parasitic

SUMMARYThe actinomycete,Pasteuria penetrans, is a specific endoparasite of various plant-parasitic nematodes. When parasitizing the root-knot nematode (Meloidogyne javanical) the nematode's capacity to reproduce is destroyed and feeding on and stimulation of the plant host are unaffected even though the bulbous body of the female nematode becomes filled with spores. Parasitism by the actinomycete does not alter the rate of growth in the early stages of nematode development although the non-parasitized female grows more rapidly than the parasitized one for a short time immediately after the final moult.Pasteuriadid not invade or inactivate the anterior oesophageal region of the femaleMeloidogyneor influence the morphology of the giant cells induced by these nematodes in their hosts' roots. The influence of this parasite on the developmental physiology of its nematode host is discussed.

Certain aspects of the host-parasite relationship of Nematospiroides dubius (Baylis). I. Resistance of male and female mice to experimental infections

Parasitology ◽  
1961 ◽  
Vol 51 (1-2) ◽  
pp. 173-179 ◽  
Author(s):  
Colin Dobson
Keyword(s):  
Relative Length ◽  
Industrial Research ◽  
Male Mice ◽  
Male And Female ◽  
Female Mice ◽  
Host Parasite Relationship ◽  
Parasite Relationship ◽  
Nematospiroides Dubius ◽  
Host Parasite ◽  
Relationship Of

1. It has been shown that there is a difference between the resistance of male and female mice to infection with Nematospiroides dubius.2. More parasites were harboured, during both the larval and adult parasitic phases, by male mice.3. These worms were found to occupy a similar relative length of the intestine between the stomach and the caecum in male and female mice infected for either 5 or 10 days.4. The relative length of the intestine infected on the fifth day was significantly greater than that infected on the tenth day.This investigation was carried out during the tenure of a Research Studentship from the Department of Scientific and Industrial Research. I should like to thank Professor I. Chester Jones, in whose department the work was done, for the facilities provided and Dr E. T. B. Francis for his helpful and critical supervision.

The age and sex of the host as factors affecting the host–parasite relationship of the third-stage larva of Amplicaecum robertsi Sprent & Mines, 1960, in the laboratory mouse

Parasitology ◽  
1966 ◽  
Vol 56 (3) ◽  
pp. 399-406 ◽  
Author(s):  
Colin Dobson
Keyword(s):  
Laboratory Mouse ◽  
Suckling Mouse ◽  
Factors Affecting ◽  
Third Stage ◽  
Host Parasite Relationship ◽  
Parasite Relationship ◽  
The One ◽  
Host Parasite ◽  
Relationship Of ◽  
Old Mice

There was no difference between the worm burdens or the lengths of the worms recovered from sexually immature male and female mice infected with Amplicaecum robertsi.In mice older than 70 days there were fewer larvae recovered from the female than the male host. The larvae were also longer in the male than in the female mouse.The suckling mouse harboured fewer larvae than the weanling; the susceptibility of the mouse continued to increase with increasing age until the one-hundredth day in the males and the seventy-fifth day in the females. In animals older than this an age resistance was apparent. It is suggested that the much lower susceptibility of the suckling mouse is due to the small gut and villi size reducing the establishment of the larvae.Worm growth also varied with host age, the longest larvae being recovered from the suckling mice and successively smaller worms from each older age group up to the seventy-fifth day, beyond which there was no significant change in worm growth with age of the host. There was no difference between the worm burdens and the lengths of the worms recovered from 90-day-old mice. The injection of testosterone had little or no effect on the host–parasite relationship of gonad-ectomized animals. Larvae from gonadectomized mice were significantly shorter than those from the intact hosts.

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