Neurophysiological alterations following fluvalinate administration in mice

Area of Science:

• Toxicology
• Neuropharmacology
• Pesticide Research

Background:

• Fluvalinate is a pyrethroid pesticide used for pest control.
• Understanding its toxicological profile is crucial for risk assessment.

Purpose of the Study:

• To determine the median lethal dose (LD50) of fluvalinate in albino mice.
• To investigate the neurotoxic effects and dose-dependent responses of fluvalinate.

Main Methods:

• Median lethal dose (LD50) determination via intraperitoneal (ip) injection in albino mice.
• Observation of gross behavioral signs and assessment of neurological functions (seizures, analgesia, anesthesia).
• Evaluation of acute and subacute (7-day) treatment effects on pentobarbitone-induced sleeping time and combined toxicity with phenobarbitone.

Main Results:

• The median lethal dose (LD50) of fluvalinate was established at 105 mg/kg (ip) in albino mice.
• Observed signs included dose-dependent central and peripheral nervous system stimulation.
• Fluvalinate administration induced maximal electroshock seizures, shortened reaction time in analgesic tests, and prolonged ether anesthesia duration.
• Both acute and subacute fluvalinate treatments increased pentobarbitone sleeping time.
• Pre-treatment with phenobarbitone enhanced the toxicity of fluvalinate.

Conclusions:

• Fluvalinate exhibits significant neurotoxic effects in mice, primarily acting as a nervous system stimulant.
• The LD50 and observed neuropharmacological effects highlight the potential hazards associated with fluvalinate exposure.
• Combined exposure with other CNS-active agents like phenobarbitone may exacerbate fluvalinate toxicity.