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1 July 2001 Experimentally Induced Heat-Shock Tolerance in Panstrongylus megistus (Hemiptera: Reduviidae)
Simone L. Garcia, Maria Luiza S. Mello, Nancy L. Garcia, Vera L. C C. Rodrigues
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Abstract

The survival and molting incidence of fifth-instar nymphs of Panstrongylus megistus (Burmeister, 1835), a vector of Chagas’ disease, were investigated following sequential heat shocks in which a mild shock (35 or 40°C, 1 h) preceded a more drastic one (40°C, 12 h). The shocks were separated by 8-, 18- 24-, or 72-h periods at 28°C. The heat-shock tolerance response was more effective when the first shock was given at 40°C. When the period between shocks was 18 h, the tolerance to sequential shocks (in terms of specimen survival) weakened, which suggested a transient control of the process that enables the organism to circumvent the unfavorable effects of severe shock. In terms of molting incidence, the heat-shock tolerance was only demonstrated when the period between the first shock at 40°C for 1 h and the second shock at 40°C for 12 h was ≥24 h. These results are the first to demonstrate the induction of heat-shock tolerance in a blood-sucking hemipteran.

Simone L. Garcia, Maria Luiza S. Mello, Nancy L. Garcia, and Vera L. C C. Rodrigues "Experimentally Induced Heat-Shock Tolerance in Panstrongylus megistus (Hemiptera: Reduviidae)," Journal of Medical Entomology 38(4), 510-513, (1 July 2001). https://doi.org/10.1603/0022-2585-38.4.510
Received: 3 October 2000; Accepted: 1 January 2001; Published: 1 July 2001
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