Internal parasites of Washington cattle

Area of Science:

• Veterinary Parasitology
• Animal Health
• Livestock Management

Background:

• Internal parasites pose a significant threat to cattle health and productivity.
• Understanding parasite prevalence is crucial for effective disease control strategies in cattle operations.

Purpose of the Study:

• To estimate the occurrence and prevalence of internal parasites in cattle populations in Washington State.
• To identify specific parasite species and their distribution in different cattle management systems.

Main Methods:

• Analysis of over 3,700 fecal samples from 29 cattle herds and 4 feedlots.
• Examination of viscera from 55 cattle to identify parasitic infections.
• Data collection conducted during 1972 and 1973.

Main Results:

• High prevalence of coccidia (77%) and strongyle eggs (44%) in herd fecal samples.
• Ostertagia spp. was the predominant parasite identified in cattle viscera.
• Cattle on irrigated pastures showed higher Fasciola and strongyle egg prevalence.

Conclusions:

• Internal parasitic infections are widespread in Washington cattle, necessitating targeted control measures.
• Management practices, particularly the use of irrigated pastures, influence parasite exposure.
• Seasonal variations impact parasite egg shedding, requiring adaptive management strategies.