02976naa a2200349 a 450000100080000000500110000800800410001910000180006024501150007826000090019350001160020252018500031865000120216865000260218065000130220665000120221965000240223165000170225565000190227265300230229165300390231465300120235365300260236565300130239170000230240470000280242770000190245570000220247470000210249670000170251777300920253420948642018-08-30       2018    bl uuuu     u00u1 u    #d1 aSÁ, M. C. A.  aResistance of Corynebacterium pseudotuberculosis in the Brazilian semiarid environment.h[electronic resource]  c2018  aTítulo em português: Resistência de Corynebacterium pesudotuberculosis no ambiente do semiárido brasileiro.  aThe semiarid northeast of Brazil contains a unique biome known as caatinga, with a maximum temperature of 40 ºC and a relativity humidity of 56%. The caatinga is characterized by a variety of plants, including Cereus jamacaru Dc (mandacaru), Poincianella microphylla Mart. ex G. Don (catingueira), Pilosocereus gounellei FAC Weber (xique-xique) and Mimosa tenuiflora (Willd.) Poir (jurema preta). Sheep and goat industries are economically strong in that region, despite the fact that caseous lymphadenitis is highly prevalent. The aim of the present study was to assess the survival and biofilm production of Corynebacterium pseudotuberculosis isolates in the invironment and under controlled temperatures (28°C, 37°C and 42°C) under different surfaces (plants, soil, wood, wire and thorns). In addition, we investigated the effects of applying the disinfectants chlorhexidine, hypochlorite and quaternary ammonia in soil, tiles, wood and vegetation cover. Four strains of C. pseudotuberculosis were selected (two from goats and two from sheep) for inoculation according to their in vitro biofilm production. Adherence to microplates was used to assess the biofilm-forming ability of the bacteria. Lower survival rates were observed when isolates of C. pseudotuberculosis were subjected to a temperature of 42°C. In terms of caatinga biome plants, contamination of jurema-preta plants resulted in the lowest survival rates. The disinfectant quaternary ammonia promoted a lower inoculum survival in all surfaces. The disinfectants and the higher temperature contributed to the reduction of biofilm production in isolates of C. pseudotuberculosis. knowledge of these patterns is important for the establishment of disease control measures, given the questionable efficacy of the treatment and the immuno-prophylaxis of caseous lymphadenitis.  aBiofilm  aCaseous lymphadenitis  aBiofilme  aDoença  aLinfadenite Caseosa  aResistência  aSobrevivência  aBrazilian semiarid  aCorynebacterium pesudotuberculosis  aDisease  aSemiárido brasileiro  aSurvival1 aOLIVEIRA, S. A. S.1 aDANTAS JUNIOR, E. de M.1 aGOUVEIA, G. V.1 aGOUVEIA, J. J. S.1 aVESCHI, J. L. A.1 aCOSTA, M. M.  tPesquisa Veterinária Brasileira, Rio de Janeirogv. 38, n. 6, p. 1091-1096, junho 2018