Martha A. Krump’s research while affiliated with University of Nevada, Reno and other places

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Publications (2)


Developmental Changes in Hymenolepis citelli and Hymenolepis diminuta during Patency
  • Article

January 1987

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12 Reads

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4 Citations

Journal of Parasitology

Robert W. Mead

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Nick Zappas

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John Thomford

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Martha A. Krump

Stem cell frequency, wet weight, proglottid number, and egg production were measured in Hymenolepis citelli at specific intervals between 20 and 120 days postinfection in an effort to correlate changes in stem cell frequency to other developmental parameters. Considerable variability was seen in wet weight and proglottid number, but differences did not seem to reflect any relation between these parameters and stem cell frequency. Significant differences were observed in egg production at specific postinfection periods. These appeared to correspond to changes seen in stem cell frequency during patency. Similar changes in egg production which also correspond to measured changes in stem cell frequency were recorded for Hymenolepis diminuta. Differences were also seen in number of eggs contained within gravid proglottids at various times postinfection for both species.


Abnormal regeneration in the planarianDugesia tigrina as a function of the length: Width ratio of the regenerating fragment

September 1986

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16 Reads

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3 Citations

Journal of Experimental Zoology

Regeneration was examined in different regions of planaria (Dugesia tigrina) in order to determine the effect that the shape of a section exerts on regenerative success. Length:width ratios were used as an index of tissue proportion, and overall regenerative success was measured by percent of abnormal regenerates and number of abnormalities per abnormal regenerate. Frequency and number of abnormalities increased as section width exceeded section length. Frequency of specific abnormalities varied with changes in length:width ratios and followed a predictable pattern. As ratios decreased below 1.0, abnormalities typically consisted of characteristics regarded as being due to excess head formation. These included the presence of two heads, the “head hump” syndrome, and/or lack of pharynx. This excess head formation was due to the proportional shape of the section rather than to overall segment size, and the frequency of such abnormalities increased in proportion to decreases in length:width ratios. Abnormalities which were more typically seen at ratios over 1.0 consisted of the lack of head, pharynx, and/or polarity.

Citations (1)


... The processes occurring during parasite excystment (Caley, 1975) and the changes in embryonic cell frequencies during subsequent adult worm development (Loehr and Mead, 1980) were described in detail. Embryonic-germinative cells were further studied in the prepatent and patent periods of Hymenolepis worm infections in rodents (Mead et aL, 1986). An important finding was that an increase in worm population led to the non-synchronous development of several parasite populations. ...

Reference:

Cestode parasites: Application of in vivo and in vitro models for studies on the host-parasite relationship
Developmental Changes in Hymenolepis citelli and Hymenolepis diminuta during Patency
  • Citing Article
  • January 1987

Journal of Parasitology