Activity of moxidectin 1% injectable solution against first instar Hypoderma spp. in cattle and effects on antibody...

Area of Science:

• Veterinary Parasitology
• Animal Health
• Pharmacology

Background:

• Hypoderma spp. (cattle grubs) cause significant economic losses in the cattle industry.
• Effective control strategies are crucial for maintaining herd health and productivity.
• Moxidectin is a broad-spectrum endectocide with potential for treating parasitic infections in livestock.

Purpose of the Study:

• To evaluate the efficacy of a 1% w/v moxidectin injectable solution against first instar Hypoderma spp. in cattle.
• To assess the safety and potential for hypersensitivity reactions following moxidectin treatment.
• To monitor the impact of treatment on the host's immune response.

Main Methods:

• Sixteen naturally infested young cattle were selected based on serological status and divided into two groups.
• One group received moxidectin (0.2 mg/kg subcutaneously); the control group received the vehicle.
• Serological status was monitored weekly post-treatment; Hypoderma lump presence was assessed bi-weekly.

Main Results:

• The moxidectin injectable formulation achieved 100% efficacy in eliminating Hypoderma spp. infections.
• Treated calves exhibited a gradual decline in antibody levels for one month post-treatment.
• No significant hypersensitivity reactions were observed, suggesting a favorable safety profile.

Conclusions:

• Moxidectin 1% w/v injectable solution is a highly effective treatment for Hypoderma spp. in cattle.
• The observed antibody level changes suggest a progressive action of moxidectin and a low risk of adverse immune responses.
• This formulation represents a valuable tool for managing cattle grub infestations.