The enormous garbage production is one of the major environmental issues in the
present. The inappropriate discard and management of garbage give serious risks to the
human and ecosystem health. The leachate, liquid produced by garbage decomposition,
may contains harmful molecules that damage the genetic material, such as heavy
metals and aromatic polycyclic hydrocarbon (APH). The present study goals to evaluate
the genotoxic and histopathological effects of the leachate from Santarém Landfill Dump
in fishes - Hyphessobrycon heterorhabdus. Micronucleus, erythrocyte nuclear
abnormalities techniques and comet assay were conducted for the genotoxicity
evaluation, while tissue injuries were assessed with gills and liver histological
preparations. The fishes were exposed to leachate (10, 5 and 2%), to natural stream
Cararazinho’s water and to 20ppm benzene. The genotoxicity biomarkers do not
evidenced significant variation between exposed and control group (stream natural
water). Gills and liver showed diverse types of tissue lesions. Therefore, under the light
of these results we conclude that Cararazinho’s stream water, because receives
leachate from the Santarém Landfill Dump, plays to the occurrence of genotoxic and
tissue damages in fishes H. heterorhabdus.
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