'''Friesians''' appear particularly susceptible to infection with [[Theileria]] species.
'''Friesians''' appear particularly susceptible to infection with [[Theileria]] species.
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[[Parturition Endocrine Control – Anatomy & Physiology | Parturition]], [[Lactation – Anatomy and Physiology | lactation]] and stress can make an animal vulnerable to theileriosis, as they can any disease.
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[[Parturition Endocrine Control - Anatomy & Physiology | Parturition]], [[Lactation - Anatomy & Physiology | lactation]] and stress can make an animal vulnerable to theileriosis, as they can any disease.
Age linked tolerance may make younger calves more tolerant of disease than adults in some areas.
Age linked tolerance may make younger calves more tolerant of disease than adults in some areas.