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The venomous Levantine viper, Macrovipera lebetina lebetina is endemic to Cyprus. The objective of this study was to investigate in vitro cytotoxicity, in vivo lethality, and antivenom production followed by a re-immunization schedule in mice against Macrovipera lebetina lebetina venom. The LD50 value was estimated as 7.58 mg/kg within 24 hours by different venom doses administrated intraperitoneally in mice. Freund's complete and incomplete adjuvants were used for first and second immunization of mice in antivenom production. A cell-based assay was performed to determine the effects of Macrovipera lebetina lebetina venom and antivenom neutralizing potency on L929 cell viability. The snake venom toxicity and cytotoxicity were examined and comparison of results showed good correlation, the LD50 value was tenfold higher than the IC50 value. The IC50 value was 0.62 ± 0.18 mL after 48 hours treatment while the calculated value was 1.62 ± 0.25 mL for the culture media totally refreshed after two hours treatment with venom. The in vitro efficacy of antivenom against Macrovipera lebetina lebetina venom was found to be low. This is the first report that describes the in vivo and in vitro toxic effects of Macrovipera lebetina lebetina venom and antivenom production against this species

the journal of venomous animals and toxins including tropical diseases

Determination of in vivo toxicity and in vitro cytotoxicity of venom from the Cypriot blunt-nosed viper Macrovipera lebetina lebetina and antivenom production