ABSTRACTRabbit antisera to heat‐stable antigens of equine, porcine, ovine and avian (turkey and chicken) kidney/adrenals were used in agar‐gel diffusion experiments to detect the presence of flesh from these species in thoroughly cooked beef sausages adulterated at the 10,5 and 1 levels. Mammalian adrenal antigens were detected in beef sausages at the 5 level; avian kidney/adrenal antigens were detected at the 10 level of adulteration. Species cross reactivity was observed between bovine and ovine adrenals antigens and between turkey and chicken kidney/adrenal antigens. This method can be used to determine species of origin of thoroughly cooked beef sausa
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