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The authors highlight the reliance on repeated natural infections by tickborne pathogens to maintain immunity in immunized herds. That incidence of clinical heartwater in cattle, caused by Cowdria ruminantium, is low while intensive acaricide use interrupts transmission of pathogens. Evidence is ...
Presents a study performed to determine the level of serum immunoglobulins (Ig) and efficiency of passive immune transfer on survivality of lambs in the Ethiopian highland sheeThe influence of passively acquired immunity on neonatal lamb mortality was studied at Debre Berhan station, Internationa...
In developing countries, vaccination against highly pathogenic avian influenza subtype H5N1 (HPAI) in free-range poultry flocks is usually implemented as periodic campaigns and newborn chicks are generally not vaccinated by farmers between vaccination passes. The demographic population turnover l...
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