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Fecal IgA (solid purple) and glucocorticoid metabolite (dashed red) concentrations in a 39 year old Asian elephant that experienced a severe bout of illness including lethargy, inappetance, abdominal distension and other idiopathic signs of discomfort. The total duration of clinical signs associated with this illness is denoted by the black line; black triangles denote three periods of peak clinical signs that subsided prior to the next recurrence.
