The Growth of the Rat Tapeworm, Hymenolepis diminuta, during the First Five Days in the Final Host

Goodchild, Chauncey G.; Harrison, Deed E.

doi:10.2307/3275478

Cited by 36 publications

(11 citation statements)

References 3 publications

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“…The migrational pattern recorded above differs, in a number of important points, from those reported by Goodchild and Harrison (1961) and by Braten and Hopkins (1969). It is difficult to compare the data of the present study directly with that of Goodchild and Harrison (1961), because, first, their results were based on multiple infections in single rats, and secondly, the length of the rat intestines were not recorded.…”

Section: Discussioncontrasting

confidence: 75%

“…The large and significant difference between the results of Goodchild and Harrison (1961) and our own data, is possibly related to the size of the worm population (100 cysticercoids per rat) used by Goodchild and Harrison. This suggestion is supported by the results of Braten and Hopkins (1969), who, using single worm infections, failed to demonstrate either a significant anterior migration between days 5 and 7 or a posteriad migration between days 7 and 16, but instead found a gradual forward migration between days 5 and 14; after day 14 nearly all the worms were attached 10-20% of the distance down the small intestine.…”

Section: Discussioncontrasting

confidence: 62%

“…This anterior migration of transplants has recently been confirmed by Braten and Hopkins (1969). Goodchild and Harrison (1961) also found that, during the first 5 days postinfection, the young worms not only migrated forward, but concentrated themselves in the anterior part of the intestine, so that 68% of the 5-day-old scoleces were found in the region 25-28 cm behind the stomach. Holmes (1961Holmes ( , 1962 however, in a series of experiments extending over 8 weeks, found that at 7 days postinfection H. diminuta was attached near the middle of the intestine, and that they migrated anteriorly to their definitive attachment points during the second change in the attachment sites once the anterior migration had hished.…”

Section: Introductionsupporting

confidence: 55%

“…It is difficult to compare the data of the present study directly with that of Goodchild and Harrison (1961), because, first, their results were based on multiple infections in single rats, and secondly, the length of the rat intestines were not recorded. They reported that at 5 days postinfection 68% of the young worms were attached in an area 25-28 cm behind the stomach.…”

Section: Discussionmentioning

confidence: 81%

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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: Discussioncontrasting

confidence: 75%

Section: Discussioncontrasting

confidence: 62%

Section: Introductionsupporting

confidence: 55%

Section: Discussionmentioning

confidence: 81%

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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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“…Although parenchymal tissue has been described in the scolex of pseudophyllideans (Rees 1958), tetrabothridians (Williams 1966;Rees 1966), trypanorhynchs (Johnstone 191 1 ;Pinter 1880), and cyclophyllideans (Goodchild and Harrison 1961), parenchyma was not observed in the scolex of the metacestode of H. microstoma. Muscle-cell bodies, however, were present in profusion.…”

Section: Discussionmentioning

confidence: 99%

The gross anatomy and histology of the nervous system of the metacestode of Hymenolepis microstoma

Webb¹,

Davey²

1975

Can. J. Zool.

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The central nervous system of the metacestode of Hymenolepis microstoma consists of three levels of ganglia. The bilateral cerebral ganglia, joined by a broad transverse commissure, are situated posteriad to the outer rostellar capsule. The bilateral rostellar ganglia, joined by a medial transverse commissure and a dorsal and a ventral circular commissure, are situated between the inner and outer rostellar capsules. The single rostral ganglion is found within the inner rostellar capsule. Numerous nerves and connectives are given off from the various ganglia; the nerves innervate the tissues and organs of the scolex and presumptive neck of the metacestode. Histologically, the ganglia and large commissures consist of a rind of nerve cell bodies surrounding a compact core of neuropile. A delimiting sheath or capsule is not present. Glial tissue is absent. Muscle cells, tegumental cells, and flame cells may interdigitate with the nerve cells. The nerve cell bodies give off numerous neurites that pursue a tortuous course through the neuropile.

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Distribution and growth of hymenolepis diminuta in the rat, hamster and mouse

Turton

1971

Z. F. Parasitenkunde

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The Growth of the Rat Tapeworm, Hymenolepis diminuta, during the First Five Days in the Final Host

Cited by 36 publications

References 3 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

The gross anatomy and histology of the nervous system of the metacestode of Hymenolepis microstoma

Distribution and growth of hymenolepis diminuta in the rat, hamster and mouse

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