The same parasitic disease as haemonchiasis, caused by Haemonchus worms; the alternative name reflects different medical naming conventions.
From Haemonchus + '-osis' (a condition or abnormal state). Both '-iasis' and '-osis' are legitimate suffixes for naming diseases in medical terminology, reflecting historical variations in Latin and Greek medical naming.
Medical terminology often has multiple names for the same disease because different doctors, countries, and eras used different suffix conventions—it's like how 'influenza' and 'the flu' mean the same thing but sound different.
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