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The advantage of detecting diatoms in bone marrow (diatom test), is that it could be used in coming to a con­ clusion about suspected death by drowning in severely putrefied bodies where the usual signs of drowning are not present (1). However, the diatom test is controversial, with opponents and champions (2). According to some the diatom test provides the most reliable test of death by drowning (3). With the rapid onset of putrefaction in Sri Lanka, the classical features of drowning disappear quickly and detection of diatoms is bone marrow may be the only method available to detect death due to drown­ ing. In this study, bone marrow from suspected cases of drowning were digested with concentrated nitric acid, whereby all organic matter was destroyed, leaving the sili­ ceous bilaterally symmetrical shells of diatoms intact, and the deposits were examined under the microscope at a magnification of 400. The bone marrow was selected because of its unlikely ennvironmental contamination.

Detection of diatoms in the marrow of thigh bones as evidence of death by drowning