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Effect of temperature on the development of free-living stages of Strongyloides ratti

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Abstract

In the genus Strongyloides, larval development external to the host is known to be markedly affected by a variety of environmental factors. This investigation focuses on the effect of temperature on Strongyloides ratti. Low temperature (15°C) was shown to favor direct development, producing infective larvae, while high temperature (25°C) favored indirect development, producing free-living females and males. Different courses of development were brought about by either a 16-h temperature stimulus at 15°C or a 6-h temperature stimulus at 25°C. Moreover, eggs were not susceptible to the cold-temperature stimulus of 15°C, while newly hatched larvae were. The results indicate that the developmental course of S. ratti larvae external to the host is determined at a relatively early stage before the first molt.

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Correspondence to Shoji Uga.

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Minato, K., Kimura, E., Shintoku, Y. et al. Effect of temperature on the development of free-living stages of Strongyloides ratti . Parasitol Res 102, 315–319 (2008). https://doi.org/10.1007/s00436-007-0773-7

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Keywords

  • Adult Female
  • Larval Development
  • Direct Development
  • Kwashiorkor
  • Temperature Stimulus