Abstract

High malaria burden has led to the increase use of insecticides in the tropics and subtropics. This study thus aimed at
assessing the effect of insecticides inhalation on some haematological parameters using experimental animal
model.Sixteen adult male rabbits divided into four groups A, B, C and D. Group A,B and C were exposed to 20ml of
pyrethroid insecticides containing 0.05% pralletrin and 0.15% cyfluthrin by inhalation for 10mins,20mins, and
30mins respectively. Group D serve as the control and was not exposed. Baseline study was done on all the animals
before grouping for exposure. The pyrethroid insecticides was soaked in cotton wool (2.5g) in a container that was
able to prevent the animal from ingesting it, which was placed inside the room A, B and C for 10mins,20mins and
30mins respectively. The rabbits were exposed for three weeks and sample were collected at the end of each week.
Exposure was discontinued after day 21and Samples were collected again on day 28 and 35 respectively which is the
fourth and fifth week. All the animals were monitored twice daily for clinical signs like jerky movement, skin
scratching, licking of legs and other body parts. Data analysis revealed that there wassignificant effect of inhalation of
insecticides on some haematological parameters of rabbits at 10min, 20mins and 30mins of exposure. There were
significant increase in PCV, Eosinophil Platelets WBC and Neutrophil and decreased in ESR, Lymphocyte. The
results from this study have shown that aerosol of these pyrethroid insecticides(pralletrin and cyfluthrin) has effect
on haematological parameters. It is thus recommended that one should avoid exposure to the aerosol of these