Circadian Migratory Behavior of a Cestode Symbiote in the Rat Host

Read, Clark P.; Kilejian, Araxie

doi:10.2307/3277301

Cited by 90 publications

(31 citation statements)

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“…The occurrence -of such a daily migration does not, as suggested by Read and Kilejian (1969), form the basis for dismissing or invalidating the results of other workers on the long-term migration of H. diminuta during its prepatent period of development. Similar diurnal migration patterns, superimposed on long-term distribution changes, are well known in planktonic communities (Healey 1967), and there is no justification for concluding that because one rhythmic activity in an organism can be assigned to a particular category, all the rhythmic activities of the organism will be of the same pattern (Cloudsley Thompson 1961).…”

Section: Discussionmentioning

confidence: 78%

“…Finally, Read and Kilejian (1969) and Hopkins (1969) have shown that H. diminuta undergoes a daily migration pattern within the small intestine, which appears to be related to the feeding schedule of the host. The occurrence -of such a daily migration does not, as suggested by Read and Kilejian (1969), form the basis for dismissing or invalidating the results of other workers on the long-term migration of H. diminuta during its prepatent period of development.…”

Section: Discussionmentioning

confidence: 96%

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Changes in the distribution of Hymenolepis diminuta (Cestoda: Cyclophyllidea) within the rat intestine during prepatent development

Cannon¹,

Mettrick²

1970

Can. J. Zool.

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METTRICK. 1970. Changes in the distribution of Hymenolepis diminuta (Cestoda: Cyclophyllidea) within the rat intestine during prepatent development. The changes in the distribution of Hymenolepis diminuta within the rat intestine have been followed over the period 3 to 16 days postinfection using rats, each infected with 10 cysticercoids of H. diminuta, fed ad libitum on Purina Rat Chow.The parameters investigated were distribution of scolex attachment sites in the intestine, and distribution of parasite biomass in the intestine based on strobila length, ex vivo weight distribution, and in vivo weight distribution. Both the scoleces and biomass of 3-and 5:day-old worms are concentrated m the second quarter of the intestine. The mean scolex attachment point for 5-day-old worms was 39% of the total intestinal length behind the pyloric sphincter. Between days 5 and 7 there was a marked anterior migration of the young worms, so that at 7 days the mean scolex attachment.site was 15y0 of the total intestinal length behind the stomach. Over the same period of time the mean in vivo weight distribution moved forward from a point 44% behind the pyloric sphincter to one only 23% along the intestine. After 7 days there was a gradual posteriad spreading of the scolex attachment sites and of the parasite biomass. Hymenolepis diminuta can attach itself anywhere in the anterior 75% of the intestine, including in front of the opening of the bile duct: no worms were found in the small intestine extending back into the caecum.The pattern of migration and the changes in worm distribution in the intestine suggest that H. diminuta selects an appropriate, but changing position, on one or more of the gradients that have been demonstrated or postulated along the length of the small intestine.It is also suggested that the long-term migration during prepatent development is interrelated, but distinct from the daily migrational movements that H. diminuta undergoes within the small intestine.

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Section: Discussionmentioning

confidence: 78%

Section: Discussionmentioning

confidence: 96%

Changes in the distribution of Hymenolepis diminuta (Cestoda: Cyclophyllidea) within the rat intestine during prepatent development

Cannon¹,

Mettrick²

1970

Can. J. Zool.

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“…In addition, these tapeworms migrate forward in the small intestine in response to host feeding (Read & Kilejian, 1969). Numerous research efforts have attempted to identify the chemical signals involved in the migration behaviour.…”

Section: Introductionmentioning

confidence: 99%

Behavioural adaptation of the tapewormHymenolepis diminutato its environment

Sukhdeo

Kerr

1992

Parasitology

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Hymenolepis diminuta migrates up the small intestine in response to feeding the host 1 g of glucose. Locomotion during migration may result from fixed patterns of retrograde peristaltic-like waves in the strobila of the tapeworm which propel the organism against the normal expulsive forces in the small intestine. The peristaltic-like locomotory waves occur in a gradient along the strobila with a frequency of 24.9 +/- 0.9 cycles/min in the anterior segments of the worm, decreasing linearly to 6.6 +/- 1.4 cycles/min in the posterior segments of the worm. Chemical signals, isolated from the small intestine of fed hosts, which stimulate migration behaviour in vivo do not alter the behaviour of the scolex or strobila in vitro. Removal of the scolex containing the cerebral ganglia does not alter the frequency or pattern of locomotory activity in the strobila. After the worm is cut into pieces, each region generates the pattern of locomotory activity that is appropriate for that region. These data suggest that the peripheral nervous system, and not the central nervous system, is responsible for the coordination of the fixed patterns of locomotory activity in these tapeworms.

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“…the tape worm Hymenolepis diminuta in the rat, perform daily migrations in the intestine, moving forwards during the night (which is the rat's active period) and drifting posteriorly during the day (Read et al, 1969;Hopkins, 1970). The significance and mechanisms of these migrations have not yet been investigated.…”

Section: Cycles Of Intestinal Wormsmentioning

confidence: 98%

In living organisms

Hawking¹

1971

Journal of Interdisiplinary Cycle Research

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Circadian Migratory Behavior of a Cestode Symbiote in the Rat Host

Cited by 90 publications

References 0 publications

Changes in the distribution of Hymenolepis diminuta (Cestoda: Cyclophyllidea) within the rat intestine during prepatent development

Changes in the distribution of Hymenolepis diminuta (Cestoda: Cyclophyllidea) within the rat intestine during prepatent development

Behavioural adaptation of the tapewormHymenolepis diminutato its environment

In living organisms

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