ABSTRACT
O objetivo deste trabalho foi avaliar a influência do uso do aditivo ractopamina sobre os rendimentos dos cortes e a qualidade da carne suína (pH, cor, marmoreio e capacidade de retenção de água). Para os testes, foram utilizados 25 suínos alimentados com 7,5ppm de ractopamina na dieta e 25 suínos sem utilização deste aditivo. Os cortes foram obtidos através do fracionamento da carcaça em partes, sendo elas: pernil, paleta, sobrepaleta, barriga com costela e carré. Para os testes de rendimento de cortes padrão exportação, foram utilizadas 30 carcaças, sendo 15 de cada tratamento. Os resultados dos cortes de pernil e paleta foram expressos pela relação ao peso do corte preparado no padrão comercial, com relação ao peso da parte inteira obtida no momento que antecede a desossa. A utilização de Ractopamina na dieta promoveu redução no rendimento de toucinho de paleta (7,32%) e toucinho de carré (11,85%) e aumento no rendimento de carré sem toucinho (3,9%). Nos cortes padrão comercial (com a separação de ossos e gorduras), observou-se maior rendimento no pernil (7,46%) e na paleta (9,03%) com o uso do aditivo. Em relação à qualidade da carne, observou-se que o uso de ractopamina na dieta não teve influência sobre a cor e capacidade de retenção de água e teve influência sobre a redução do marmoreio da carne e pH final. Desta forma, a utilização de ractopamina na dieta suína tem influência sobre o rendimento dos cortes padrão comercial e redução da gordura na carcaça, não exercendo influência negativa sobre a qualidade da carne suína.(AU)
The objective of this study was to evaluate the use of the additive ractopamine on the cuts yield and pork meat quality (pH, color, marbling and water holding capacity). For testing it was used 25 porks fed with 7.5ppm of ractopamine f and 25 porks without use of the additive. The cuts were obtained by fractionation of carcass in parts, which are: ham palette, upper palette, belly with rib and loin. To yield of standard export cuts it was used 30 carcasses, 15 of each treatment . The results of ham cuts and palette were expressed by the weight of the cut prepared in commercial standard, in relation of the weight of the entire piece obtained at the time before boning. The use of ractopamine in diet induced a reduction in yield of bacon palette (7.32%) and bacon loin (11.85%) and an increase in the yield of loin without fat (3.9%). In standard commercial cuts (with separation of bone and fat) it was observed higher yield shank (7.46%) and palette (9.03%) with the use of the additive. Regarding the quality of the meat, it was observed that the use of ractopamine in the diet had no influence on the color and water retention capacity and had influence on the reduction of marbling and the final pH. Thus, the use of ractopamine in pork diet influences the performance of commercial standard cuts and reduced carcass fat, not exerting negative influence on the quality of pork.(AU)
Subject(s)
Animals , Food Additives/administration & dosage , Animal Feed , Red Meat/analysisABSTRACT
O objetivo deste trabalho foi avaliar a influência do uso do aditivo ractopamina sobre os rendimentos dos cortes e a qualidade da carne suína (pH, cor, marmoreio e capacidade de retenção de água). Para os testes, foram utilizados 25 suínos alimentados com 7,5ppm de ractopamina na dieta e 25 suínos sem utilização deste aditivo. Os cortes foram obtidos através do fracionamento da carcaça em partes, sendo elas: pernil, paleta, sobrepaleta, barriga com costela e carré. Para os testes de rendimento de cortes padrão exportação, foram utilizadas 30 carcaças, sendo 15 de cada tratamento. Os resultados dos cortes de pernil e paleta foram expressos pela relação ao peso do corte preparado no padrão comercial, com relação ao peso da parte inteira obtida no momento que antecede a desossa. A utilização de Ractopamina na dieta promoveu redução no rendimento de toucinho de paleta (7,32%) e toucinho de carré (11,85%) e aumento no rendimento de carré sem toucinho (3,9%). Nos cortes padrão comercial (com a separação de ossos e gorduras), observou-se maior rendimento no pernil (7,46%) e na paleta (9,03%) com o uso do aditivo. Em relação à qualidade da carne, observou-se que o uso de ractopamina na dieta não teve influência sobre a cor e capacidade de retenção de água e teve influência sobre a redução do marmoreio da carne e pH final. Desta forma, a utilização de ractopamina na dieta suína tem influência sobre o rendimento dos cortes padrão comercial e redução da gordura na carcaça, não exercendo influência negativa sobre a qualidade da carne suína.
The objective of this study was to evaluate the use of the additive ractopamine on the cuts yield and pork meat quality (pH, color, marbling and water holding capacity). For testing it was used 25 porks fed with 7.5ppm of ractopamine f and 25 porks without use of the additive. The cuts were obtained by fractionation of carcass in parts, which are: ham palette, upper palette, belly with rib and loin. To yield of standard export cuts it was used 30 carcasses, 15 of each treatment . The results of ham cuts and palette were expressed by the weight of the cut prepared in commercial standard, in relation of the weight of the entire piece obtained at the time before boning. The use of ractopamine in diet induced a reduction in yield of bacon palette (7.32%) and bacon loin (11.85%) and an increase in the yield of loin without fat (3.9%). In standard commercial cuts (with separation of bone and fat) it was observed higher yield shank (7.46%) and palette (9.03%) with the use of the additive. Regarding the quality of the meat, it was observed that the use of ractopamine in the diet had no influence on the color and water retention capacity and had influence on the reduction of marbling and the final pH. Thus, the use of ractopamine in pork diet influences the performance of commercial standard cuts and reduced carcass fat, not exerting negative influence on the quality of pork.
ABSTRACT
We describe an in vivo evolution of an antimicrobial profile from susceptibility to full-resistance to carbapenems, with heteroresistance as an intermediate stage, in an Acinetobacter baumannii strain. Heteroresistance was characterized by the growth of sub-populations within the susceptibility halo in both disk-diffusion and Etest. PCRs for the main A. baumannii carbapenemases were negative. The exact resistance mechanism, diagnostic methods and clinical relevance of heteroresistance in A. baumannii warrant further investigations. This is the first description of such phenomenon in vivo and the second report of heteroresistance to carbapenems in A. baumannii.
Subject(s)
Acinetobacter Infections/microbiology , Acinetobacter baumannii/drug effects , Anti-Bacterial Agents/pharmacology , Imipenem/pharmacology , Thienamycins/pharmacology , Acinetobacter Infections/drug therapy , Aged , Disk Diffusion Antimicrobial Tests , Drug Resistance, Multiple, Bacterial , Female , Humans , Imipenem/therapeutic use , Meropenem , Phenotype , Thienamycins/therapeutic useABSTRACT
We described a case of a 27-year old male patient with skin and soft tissue infection of a neoplastic lesion caused by Corynebacterium striatum, an organism which has been rarely described as a human pathogen. Identification was confirmed by DNA sequencing. Successful treatment with penicillin was achieved. The role of the C. striatum as an emerging opportunistic pathogen is discussed.
Subject(s)
Corynebacterium Infections/diagnosis , Corynebacterium/isolation & purification , Lymphoma, T-Cell, Cutaneous/microbiology , Opportunistic Infections/microbiology , Skin Neoplasms/microbiology , Adult , Anti-Bacterial Agents/therapeutic use , Corynebacterium/classification , Corynebacterium Infections/drug therapy , Humans , Lymphoma, T-Cell, Cutaneous/drug therapy , Male , Opportunistic Infections/drug therapy , Penicillin G/therapeutic use , Skin Neoplasms/drug therapyABSTRACT
We describe an in vivo evolution of an antimicrobial profile from susceptibility to full-resistance to carbapenems, with heteroresistance as an intermediate stage, in an Acinetobacter baumannii strain. Heteroresistance was characterized by the growth of sub-populations within the susceptibility halo in both disk-diffusion and Etest. PCRs for the main A. baumannii carbapenemases were negative. The exact resistance mechanism, diagnostic methods and clinical relevance of heteroresistance in A. baumannii warrant further investigations. This is the first description of such phenomenon in vivo and the second report of heteroresistance to carbapenems in A. baumannii.
Descrevemos a evolução in vivo, de um perfil de sensibilidade aos antimicrobianos, passando de sensibilidade a resistência total aos antibióticos carbapenêmicos, com um estágio intermediário de heteroresistência em isolado de Acinetobacter baumannii. A heteroresistência foi caracterizada pelo crescimento de sub-população na zona de inibição pelo método de disco-difusão e pelo Etest. PCRs para as principais carbapenemases envolvidas com resistência neste microrganismo foram negativas. O exato mecanismo de resistência envolvido, método diagnóstico e relevância clínica justificam investigação adicional. Esta é a primeira descrição deste fenômeno in vivo e o segundo relato de heteroresistência em A. baumannii.
Subject(s)
Aged , Female , Humans , Acinetobacter Infections/microbiology , Acinetobacter baumannii/drug effects , Anti-Bacterial Agents/pharmacology , Imipenem/pharmacology , Thienamycins/pharmacology , Acinetobacter Infections/drug therapy , Disk Diffusion Antimicrobial Tests , Drug Resistance, Multiple, Bacterial , Imipenem/therapeutic use , Phenotype , Thienamycins/therapeutic useABSTRACT
We described a case of a 27-year old male patient with skin and soft tissue infection of a neoplastic lesion caused by Corynebacterium striatum, an organism which has been rarely described as a human pathogen. Identification was confirmed by DNA sequencing. Successful treatment with penicillin was achieved. The role of the C. striatum as an emerging opportunistic pathogen is discussed.
Descrevemos infecção de lesão neoplásica em paciente masculino de 27 anos, envolvendo pele e partes moles, causada por Corynebacterium striatum, um microrganismo raramente descrito como patógeno humano. A identificação foi confirmada por seqüenciamento de DNA. O paciente foi tratado com penicilina, com sucesso. O papel do C. striatum como patógeno oportunista é discutido.