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Issues / 06/20 Print

Acute toxicity of an insecticidal little containing ivermectin and fipronil for white mice

DOI 10.33861/2071-8020-2020-6-31-32

Levchenko M.A., Sennikova N.A.

Summary. Toxicological assessment is a mandatory research step in the development of new insecticidal drugs. At the All-Russian Research Institute of Veterinary Entomology and Arachnology, a prototype of the insecticidal bait Mukhnet IF was obtained with an active ingredient content of 0.06% ivermectin and 0.015% fipronil, which showed a highly effective effect against houseflies. This work presents the results of the study of acute oral toxicity of the above agent. For this, male white mice with a live weight of 16-26 g were selected. They were kept on a starvation diet for one day in individual houses with water. The drug was given in mg/kg body weight the next day. A total of 33 doses have been tested, ranging from 100 mg/kg to 40,000 mg/kg. The animals were observed for 14 days. According to the research results, it was revealed that at doses up to 20,000 mg/kg there were no signs of intoxication, but when tested at 25,000 mg/kg in some mice, these signs were noted, and at 30,000, 35,000 and 40,000 mg/kg deaths were recorded 20±10, 45±30 and 60±20%, respectively. It was not possible to test the drug over the last above dose due to incomplete eaten by mice. According to the degree of danger for warm-blooded animals, the drug belongs to the 4th class of low-hazard drugs (average lethal dose of 5000 mg/kg or more) in accordance with the classification of GOST 12.1.007-76. When analyzing the literature data on the toxicological characteristics of preparations containing ivermectin and chlorfenapyr, it was revealed that the insecticidal agent in its acute toxicity for warm-blooded animals is comparable to known analogues.

Keywords: insecticidal bait, ivermectin, chlorfenapyr, signs of intoxication, acute toxicity, white mice, hazard class, literature analysis.


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Author affiliation:

Sennikova Natalia A., laboratory assistant of the Laboratory of veterinary problems in animal husbandry of the All-Russian Scientific Research Institute of Veterinary Entomology and Arachnology; 2, Institutskaya st., Tyumen, 625041; phone: 8-3452-258558; e-mail:

Responsible for correspondence with the editorial board: Levchenko Mikhail A., Ph.D. in Veterinary Medicine, Head of the Laboratory of veterinary problems in animal husbandry of the All-Russian Scientific Research Institute of Veterinary Entomology and Arachnology; 2, Institutskaya st., Tyumen, 625041; phone: 8-3452-258558; e-mail:


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