%0 Journal Article
%T Resistencia antibi¨®tica de genotipos de cepas de Salmonella spp de cerdos sacrificados en rastros del Estado de M¨¦xico
%A Talavera Rojas
%A Mart¨ªn
%A Varela Guerrero
%A Jorge Antonio
%A Reyes Rodr¨ªguez
%A Nydia Edith
%A Lagunas Bernab¨¦
%A Salvador
%A Valladares Carranza
%A Benjam¨ªn
%A Alonso Fresan
%A Mar¨ªa Uxua
%A Vel¨¢zquez Ordo£¿ez
%A Valente
%J Veterinaria M¨¦xico
%D 2011
%I Universidad Nacional Aut¨®noma de M¨¦xico
%X multiresistant salmonella serovar typhimurium strains are a worldwide problem in animal and human health. the aim of this study was to determine the frequency of some salmonella spp resistance genes (cmla/tetr, pse-1, tem, sip b/c) in strains isolated from pigs slaughtered at abattoirs in the estado de mexico. of 87 analyzed strains 22 (25.28%) had phenotypical resistance to chloramphenicol (30 ¦Ìg), 15 (17.24%) to ampicillin (10 ¦Ìg) and 54 (62.07%) to sulfamethoxazole (60 ¦Ìg). the phenotypical and genotypical relation of the 87 strains was: of the 22 chloramphenicol resistant strains only 14 (63.63%) expressed the cmla/tetr resistance gene, and of the 65 strains non-resistant to chloramphenicol only 36 (55.38%) expressed the cmla/tetr resistance gene. regarding the 15 ampicillin resistant strains only 2 (13.33%) were carriers of the pse-1 gene and 7 (46.66%) presented the tem gene; both genes confer genotypical ampicillin resistance. of 72 non-resistant ampicillin strains, 11 (15.27%) carried the tem gene which confers ampicillin resistance. two salmonella strains (2.28%) belonged to phagotype dt104. strains not showing phenotypical resistance but carrying resistance genes have not been exposed to selection by competition, although they possess the mechanism to express such resistance.
%K salmonella typhimurium
%K resistance
%K pigs
%K antibiotics.
%U http://www.scielo.org.mx/scielo.php?script=sci_abstract&pid=S0301-50922011000400002&lng=en&nrm=iso&tlng=en