The milk production of 6 cows infected with 15000 infective trichostrongylid larvae per week for 9 weeks in early lactation was compared with the milk production of 6 uninfected cows. After adjustment for differences in pre-infection milk production by covariance analysis, the infected cows produced 2.16 kg/day less milk than the uninfected cows.
- sheep tick
- ixodes-ricinus l
Gardiner, W. P., Gettinby, G., & Gray, J. S. (1981). Models based on weather for the development phases of the sheep tick, ixodes-ricinus l. Veterinary Parasitology, 9(1), 75-86. https://doi.org/10.1016/0304-4017(81)90009-1