Rebhun's diseases of dairy cattle (Best book for clinical practice at field level)
The general terms used to distinguish duration include peracute, acute, subacute, and chronic, although various experts disagree on the exact length of illness to define each category. Rosenberger suggests the following:
Peracute 0 to 2 days
Acute 3 to 14 days
Subacute 14 to 28 days
Chronic 28 days
These durations are somewhat longer than those commonly used in the United States, and in general we would suggest:
Peracute 0 to 24 hours
Acute 24 to 96 hours
Subacute 4 to 14 days Chronic 14 days..............continue reading
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