2019, Number 2
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Rev Biomed 2019; 30 (2)
Lucilia eximia (Diptera: Calliphoridae) as forensic indicator for the calculation of the post mortem interval in Costa Rica.
Elizondo-Delgado JI, Troyo A, Calderón-Arguedas Ó
Language: Spanish
References: 28
Page: 51-58
PDF size: 436.30 Kb.
ABSTRACT
Introduction. L. eximia is a species that shows a wide geographical
distribution in Costa Rica, whose populations are stable throughout the year.
The biological characteristics of
L. eximia allow it to be considered as a
potential forensic indicator for the calculation of the minimum
post mortem
interval (PMI).
Objective. To compare the PMI calculated by a thermal accumulation model
with
L. eximia (Diptera: Calliphoridae), with the PMI in corpses of pigs (
Sus
scrofa).
Methods. Two pig corpses were exposed in a tropical premontane moist
forest. Larvae of
L. eximia were collected from the pig carcasses at 78,
144 and 192 hours after the moment of death, and their development was
promoted under controlled conditions. With the data generated, thermal
back-projections were made to calculate the PMI.
Results. L. eximia required a total of 7 236.50 accumulated degree hours
(ADH) to complete its life cycle. The IPMs calculated by the thermal
accumulation model were 112.56, 153.60, and 104.64 hours, respectively.
Only the intermediate value did not present statistically significant differences
with the known time of death (
p›0.05).
Conclusions. The thermal accumulation model using
L. eximia as a forensic
indicator provided accurate information about the PMI only when samples
were collected at 144 hours, which indicates that this method may be accurate
and useful during the first stages of cadaveric decomposition.
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