Abstract
The objective of this experiment was to evaluate the efficacy of iodine tincture at 10% and sodium hypochlorite at 2.5% applied into the abscess of animals affected by Caseous Lymphadenitis (CL). Eighteen ewes were used, assorted into three groups: one treated with iodine tincture at 10% (IT), another one with sodium hypochlorite at 2.5% (SH) and the last group underwent the conventional treatment (CT). Conventional treatment was based on surgical drainage and chemical cauterization of the lesion with iodine tincture at 10%. Natural rupture of six abscesses from IT group was observed and in five of them the viability of Corynebacterium pseudotuberculosis was confirmed on the lesion place, after rupture of lymph node. As for the SH group, spontaneous rupture was observed in five out of six abscesses treated, and the microorganism was identified on the lesion of five animals, after rupture. In the sixth animal of this group, abscess involution was noticed. A severe swelling was identified in the region of lymph node treated, resulting in wide lesion in animals from groups IT and SH. No difference (p > 0,05) was found in blood parameters due to treatments. As for the serological monitoring of animals, comparative analysis between months within each group showed that months 1, 2, 3 and 4 were different (p < 0,05) from month 0, for groups IT and SH. For CT group, there was no difference (p > 0,05) between months 1 to 5 and 0. Then, the application of iodine tincture at 10% or sodium hypochlorite at 2.5% into the abscess of animals affected by CL, at stage in which lesions are detected through inspection, is not effective for its control.
Highlights
In recent years, the production of goats and sheep has been representing an important part in the context of Brazilian agribusiness
For iodine tincture at 10% (IT) and sodium hypochlorite at 2.5% (SH) groups, it was considered as satisfactory the treatment which promoted involution of abscess or, after spontaneous rupture of the nodule, did not contain viable C. pseudotuberculosis in the lesion
There was a natural rupture of six abscesses treated with iodine tincture at 10% (Fig. 1A), and in five of them the viability of C. pseudotuberculosis was confirmed at the lesion place, after rupture of lymph node
Summary
The production of goats and sheep has been representing an important part in the context of Brazilian agribusiness. CL is a chronic and debilitating disorder which affects small ruminants, characterised by the formation of abscesses in one or more lymph nodes, caused by Corynebacterium pseudotuberculosis, a positive Gram bacillus, short and irregular, with approximately 0.5 to 0.6 μm x 1.0 to 3.0 μm It is an infectious disease, which is a worldwide problem, responsible for causing severe economic losses for goat and sheep industry (Alves et al, 2007). The main aspect related to the control of this illness is the immediate isolation of affected animals and surgical drainage of abscess before its natural rupture, once the microorganism is able to survive and persist in the environment for a long period of time (Williams, 1980) Such characteristic of the microorganism associated with inefficiency of the treatment based on antimicrobial agents and the difficult detection of infected animals make the eradication of CL an extremely arduous task to be performed (Williamson, 2001). The aim of this experiment was to evaluate the efficacy of these substances inside the abscess of animals affected by CL in early stages of development, focusing on treating and controlling the disease
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