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Bioluminescent bacteria have potential as a marker of drowning in seawater: Two immersed cadavers retrieved near estuaries by Eiji Kakizaki; Shuji Kozawa; Masahiro Sakai; Nobuhiro Yukawa is a Medicine article available to read on EtoBox.

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We detected numerous bioluminescent bacteria in blood samples from two cadavers that had been immersed in estuarine environments. Autopsy, diatomaceous and toxicological findings indicated death by drowning, which agreed with environmental aspects and the findings of police investigations. Bioluminescent bacteria appeared in blood samples cultured on selective agar containing 2%, 3% and 4% NaCl after about 18h. Blood from the left side of the heart, the right side of the heart and the femoral vein generated 7.0 x 10(2), 2.0 x 10(4) and 8.0 x 10(2) cfu/ml of blood (case 1), and 1.8 x 10(4), 1.1 x 10(3) and 2.5 x 10(1) cfu/ml (case 2) of bioluminescent colonies, respectively, in agar containing 4% NaCl. Homologous analysis based on the 16S rRNA gene also identified the bioluminescent colonies as Vibrio fischeri and V. harveyi, which normally inhabit seawater. This simple assay might serve as an additional indicator to support a conclusion of death by drowning together with the diatom test.

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Author

Eiji Kakizaki; Shuji Kozawa; Masahiro Sakai; Nobuhiro Yukawa

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1344-6223)

Published

2009

Language

EN

Field

Medicine (Health Sciences)