Reducing Calf Mortality in Ethiopia.

Area of Science:

• Veterinary Epidemiology
• Livestock Production
• Animal Health Economics

Background:

• High calf morbidity and mortality rates in Ethiopia pose significant economic challenges to livestock producers.
• Diarrhea and respiratory diseases are primary causes of calf losses, impacting farmer incomes and livelihoods.

Purpose of the Study:

• To identify common causes of calf morbidity and mortality in Ethiopian production systems.
• To evaluate the effectiveness of improved husbandry and neonatal care interventions in reducing calf mortality, diarrhea, and respiratory disease.

Main Methods:

• Epidemiological investigation and intervention testing were conducted in calves across pastoral, peri-urban, and mixed crop-livestock systems.
• Pathogen identification included analysis for bacteria (e.g., E. coli K99), parasites (e.g., Strongyloides spp.), and viruses (e.g., bovine adenovirus, PI-3, BRSV).
• Interventions focused on enhancing producer knowledge of livestock husbandry, feeding, housing, and neonatal care.

Main Results:

• Cryptosporidium parvum and E. coli K99 were identified as leading causes of diarrhea in pastoral and peri-urban calves.
• Strongyloides spp. were the most common fecal parasites in mixed crop-livestock and peri-urban calves.
• Bovine adenovirus, parainfluenza virus-3, and bovine respiratory syncytial virus were key respiratory pathogens in peri-urban calves.
• Interventions reduced calf mortality risk by 31.4-71.4%, diarrhea risk by 52.6-75.3%, and respiratory disease risk by 23.6-80.8%.

Conclusions:

• Improved producer knowledge of fundamental livestock husbandry and care practices significantly reduces calf mortality, diarrhea, and respiratory disease.
• Findings support the development of scaling strategies to enhance livestock productivity and human livelihoods in Ethiopia.
• Targeted identification of common pathogens aids in developing effective disease control measures.