Jk. Shearer et J. Hernandez, Efficacy of two modified nonantibiotic formulations (Victory) for treatment of papillomatous digital dermatitis in dairy cows, J DAIRY SCI, 83(4), 2000, pp. 741-745
A field trial was conducted to compare the efficacy of the original and two
modified formulations of Victory and oxytetracycline among dairy cows affe
cted with papillomatous digital dermatitis. Seventy-eight cows with papillo
matous digital dermatitis lesions were randomly allocated to one of four tr
eatment groups (A, B, C, D). Cows in group A (n = 19) were treated with an
oxytetracycline solution; cows in group B (n = 22) were treated with the or
iginal formulation of Victory containing soluble copper, peroxide compound,
and a cationic agent; cows in group C (n = 17) were treated with a modifie
d formulation of Victory containing reduced soluble copper and peroxide com
pound but increased levels of cationic agent; and cows in group D (n = 20)
were treated with a modified formulation of Victory containing levels of so
luble copper and cationic agent equivalent to the original formulation but
with reduced concentrations of peroxide compound. Cows were examined 7, 14
and 28 d after initial treatment; during each examination, pain and lesion
scores were recorded. The modified nonantibiotic formulation used in cows i
n group C appeared to be the most effective for treatment of papillomatous
digital dermatitis. Proportions of cows with signs of pain were significant
ly lower among cows in group C, compared with cows in group A. Similarly, p
ain scores were significantly lower among cows in treatment group C, compar
ed to cows in group A. The low efficacy of oxytetracycline was an unexpecte
d result and may have clinical implications associated with possible antibi
otic resistance in dairy cows affected with papillomatous digital dermatiti
s.