Clinical aspects, mortality and prevalence rates of photosensitization in cattle grazing Brachiaria decumbens for 90 days

Fagliari, J.J.; Okuda, H.T.; Passipieri, M.; Pereira, G.T.

Ars Veterinaria 19(2): 129-134

2003


Accession: 004075380

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Abstract
280 weaned calves grazing on B. decumbens pasture were examined. 181 of them (64.64%) showed photosensitization wherein 151 (83.42%) sick animals survived and 30 (16.58%) animals died. The death occurred between 18 to 47 days after the onset of the symptoms. From the 181 sick calves, 86 (47.52%) had subclinical intoxication, 65 (35.91%) had moderate clinical form and 30 (16.57%) had severe photosensitization. 71 (39.22%) animals became sick during the first 30 days after grazing B. decumbens, 63 (34.80%) showed the disease after 31 to 60 days and 47 (25.96%) after 61 to 90 days.