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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

THE EFFICIACY OF VARIOUS SALMONELLA INTERVENTION METHODS APPLIED TO PORK CARCASSES DURING SLAUGHTER

Clayton, Nathan C. 01 January 2002 (has links)
Twenty-one market-age swine slaughtered in the University of Kentuckyabattoir were inoculated with fecal slurry containing two strains of nalidixic acidresistant Salmonella typhimurium on the ham, belly, and jowl regions on eachside of the carcass. Trial 1 revealed that a 10 s hot water spray was just aseffective as the 20 s spray in removing S. typhimurium, as there was nodistinguishable difference in population. The shorter flame singe (10 s) was aseffective as the 20 s application and the two chlorine solutions (100, 200 ppm)had similar results. The 2% lactic acid spray reduced S. typhimurium populationssignificantly more than the 1% treatment. Trial 2 compared the four mostefficient levels of each intervention method. Efficacy of the intervention methodswas observed in the following order: Hot water (10 s) andgt; Chlorine (50 ppm) =Lactic acid (2%) andgt; Flame (10 s). The effect of carcass area was significantfollowing the post treatment hot water rinse. The jowl area was least accessibleby the high pressure water spray. However after the treatment applications, hotwater rinse, and 24 h chill (2??C) there was no significant difference betweentreated and untreated carcasses or between carcass areas.
2

Ocorrência de Yersinia enterocolitica e Salmonella spp. no abate de suínos

Saba, Rachel Zoccal [UNESP] 04 February 2011 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:32:52Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-02-04Bitstream added on 2014-06-13T19:22:38Z : No. of bitstreams: 1 saba_rz_dr_jabo.pdf: 407693 bytes, checksum: 71068ef615a266d143b100dcc8934b64 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Tendo em vista a importância da Yersinia enterocolitica e Salmonella spp. como agentes zoonóticos e a carne suína a veiculação, realizou-se o presente estudo objetivando determinar a ocorrência desses agentes na linha de abate de suínos. Para tal, foram analisadas 175 amostras compostas de línguas (L), tonsilas (T), linfonodos submandibulares (LS), linfonodos mesentéricos (LM), carcaças (SC), conteúdo retal (SR) de suínos e de facas (SF) utilizadas pela inspeção. Para a pesquisa de Salmonella spp. utilizou-se a técnica convencional de isolamento e para a de Yersinia enterocolitica, além desta técnica foi empregada a da reação em cadeia da polimerase, com um par de primer específico para a determinação da espécie e outro para a detecção do gene ail. Yersinia enterocolitica foi isolada em 8% das amostras por meio de técnica convencional em L, T, LS, LM e em SF e foi detectada em 4,6% por PCR em L, LM, SC, SR e SF. Salmonella Anatum foi isolada apenas em amostras de língua, correspondendo a 1,2% do total de amostras. O antibiograma revelou 100% dos isolados de Y. enterocolitica resistentes à ampicilina, amoxicilina+clavulanato, cefalotina e imipenem, em menor porcentagem à cefuroxima (92,9%), ceftazidima (85,7%), sulfametoxazol+trimetropim (78,6%), ciprofloxacina (78,6%), amicacina (71,4%) e também gentamicina (71,4%). Todos os isolados de Salmonella Anatum foram resistentes ao meropenen, à oxitetraciclina e à eritromicina. Os resultados destacam a região da cabeça do suíno, especialmente língua, tonsilas e linfonodos, como potenciais disseminadores, principalmente de Yersinia enterocolitica, aos humanos. Além da adoção de práticas de higiene durante as operações de abate, algumas adaptações nos procedimentos de inspeção poderiam contribuir para minimizar o risco de disseminação desses patógenos... / Considering the importance of Yersinia enterocolitica and Salmonella spp. as zoonotic pathogens and to the pork their vehiculation, the purpose of the present study was to asses the occurrence of these pathogens on pork slaughter chain. At the swine abattoir, a hundred seventy five samples of tongues (TG), tonsils (TS), submandibular lymph nodes (SL), mesenteric lymph nodes (ML), carcasses (CS) rectal content (RS) and inspection knives (IK) were collected. Traditional isolation method was used to investigate Salmonella spp. and for Yersinia enterocolitica investigation, besides this method was also used a polymerase chain reaction (PCR) method, with specific primer for specie detection and another for ail gene detection. By traditional method, Yersinia enterocolitica was isolated in 8% of the samples in TG, TS, SL, ML and IK and by PCR was detected in 4.6% in TG, ML, CS, RS and IK. Salmonella Anatum was isolated from tongues only, in 1.2% of total samples. The antibiogram showed 100% of Yersinia enterocolitica strains resistant to ampicillin, amoxicillin + clavulanate, cephalothin and imipenem, cefuroxime in lower percentage (92.9%), ceftazidime (85.7%), sulfamethoxazole + trimethoprim (78.6%), ciprofloxacin (78.6%), amikacin (71.4%) and gentamicin (71.4%). All Salmonella Anatum strains were resistant to meropenen, oxytetracycline and erythromycin. The results showed the head region, especially the tongue, tonsils and lymph nodes might represent contamination risks for Yersinia enterocolitica. Besides the hygienic practices during slaughter process, changes in inspection procedures could reduce the risk of spread these pathogens. The results of this study represent an important contribution for public health
3

Ocorrência de Yersinia enterocolitica e Salmonella spp. no abate de suínos /

Saba, Rachel Zoccal. January 2011 (has links)
Orientador: Oswaldo Durival Rossi Júnior / Banca: Naiá Carla Marchi de Rezende Lago / Banca: Ana Maria Centola Vidal Martins / Banca: Hirasilva Borba / Banca: Angela Cleusa de Fátima Banzatto de Carvalho / Resumo: Tendo em vista a importância da Yersinia enterocolitica e Salmonella spp. como agentes zoonóticos e a carne suína a veiculação, realizou-se o presente estudo objetivando determinar a ocorrência desses agentes na linha de abate de suínos. Para tal, foram analisadas 175 amostras compostas de línguas (L), tonsilas (T), linfonodos submandibulares (LS), linfonodos mesentéricos (LM), carcaças (SC), conteúdo retal (SR) de suínos e de facas (SF) utilizadas pela inspeção. Para a pesquisa de Salmonella spp. utilizou-se a técnica convencional de isolamento e para a de Yersinia enterocolitica, além desta técnica foi empregada a da reação em cadeia da polimerase, com um par de primer específico para a determinação da espécie e outro para a detecção do gene ail. Yersinia enterocolitica foi isolada em 8% das amostras por meio de técnica convencional em L, T, LS, LM e em SF e foi detectada em 4,6% por PCR em L, LM, SC, SR e SF. Salmonella Anatum foi isolada apenas em amostras de língua, correspondendo a 1,2% do total de amostras. O antibiograma revelou 100% dos isolados de Y. enterocolitica resistentes à ampicilina, amoxicilina+clavulanato, cefalotina e imipenem, em menor porcentagem à cefuroxima (92,9%), ceftazidima (85,7%), sulfametoxazol+trimetropim (78,6%), ciprofloxacina (78,6%), amicacina (71,4%) e também gentamicina (71,4%). Todos os isolados de Salmonella Anatum foram resistentes ao meropenen, à oxitetraciclina e à eritromicina. Os resultados destacam a região da cabeça do suíno, especialmente língua, tonsilas e linfonodos, como potenciais disseminadores, principalmente de Yersinia enterocolitica, aos humanos. Além da adoção de práticas de higiene durante as operações de abate, algumas adaptações nos procedimentos de inspeção poderiam contribuir para minimizar o risco de disseminação desses patógenos ... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Considering the importance of Yersinia enterocolitica and Salmonella spp. as zoonotic pathogens and to the pork their vehiculation, the purpose of the present study was to asses the occurrence of these pathogens on pork slaughter chain. At the swine abattoir, a hundred seventy five samples of tongues (TG), tonsils (TS), submandibular lymph nodes (SL), mesenteric lymph nodes (ML), carcasses (CS) rectal content (RS) and inspection knives (IK) were collected. Traditional isolation method was used to investigate Salmonella spp. and for Yersinia enterocolitica investigation, besides this method was also used a polymerase chain reaction (PCR) method, with specific primer for specie detection and another for ail gene detection. By traditional method, Yersinia enterocolitica was isolated in 8% of the samples in TG, TS, SL, ML and IK and by PCR was detected in 4.6% in TG, ML, CS, RS and IK. Salmonella Anatum was isolated from tongues only, in 1.2% of total samples. The antibiogram showed 100% of Yersinia enterocolitica strains resistant to ampicillin, amoxicillin + clavulanate, cephalothin and imipenem, cefuroxime in lower percentage (92.9%), ceftazidime (85.7%), sulfamethoxazole + trimethoprim (78.6%), ciprofloxacin (78.6%), amikacin (71.4%) and gentamicin (71.4%). All Salmonella Anatum strains were resistant to meropenen, oxytetracycline and erythromycin. The results showed the head region, especially the tongue, tonsils and lymph nodes might represent contamination risks for Yersinia enterocolitica. Besides the hygienic practices during slaughter process, changes in inspection procedures could reduce the risk of spread these pathogens. The results of this study represent an important contribution for public health / Doutor

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