Occurrence and antimicrobial resistance of Salmonella serotypes isolates recovered from poultry of Western Paran, Brazil

Abstract

This study was conducted to determine the occurrence and antimicrobial resistance of Salmonella serotypes isolates from feces, feed and broiler litter in poultry broilers in western Paraná between 2006 and 2010. The antigenic characterization and identification of serotypes confirmed 118 samples of Salmonella spp., belonging to 38 different serotypes. The most common serotypes identified were S. enteritidis (16.1%), S. heidelberg (5.9%), S. typhimurium (5.9%), S. hadar (5.0%), S. albany (4.2%), S. enterica (4.2) and S. saintpaul (4.2%). The serotypes of Salmonella spp. isolates were examined for resistance against 13 antibiotics using the disc diffusion method. Thirty-six samples (30.5%) were susceptible to all antimicrobials, and among the 82 resistant strains, there were 25 different resistance patterns. Serotypes' multi-resistant to streptomycin, nalidixic acid and tetracycline (20.7%), nalidixic acid (13.4%) and nalidixic acid and tetracycline (11.0%) were found at higher frequency. The results revealed high prevalence of Salmonella spp. mainly S. enteritidis (16.1%) in aviary environment and percentage of strains' resistant to conventional antibiotics.

Occurrence, quantification, pulse types, and antimicrobial susceptibility of Salmonella sp. isolated from chicken meat in the state of Paraná, Brazil

“…In 2003, 27.6% of Salmonella sp. isolates were resistant to chloramphenicol, a percentage which was gradually reduced to zero, as observed in the present study [62,64,65]. The lack of chloramphenicol resistance can be explained by the absence of selective pressure, inducing the bacteria to evolve without the need for a resistance gene.…”

Sources of paratyphoid Salmonella in the production chain of broilers in the Northern mesoregion of Maranhão State, Brazil

“…Enteritidis showed higher occurrence in environmental and poultry samples, and was not isolated in slaughterhouse samples (Table 2). Cardoso et al (2013) and Scur et al (2014) confirmed this serovar to be more prevalent in samples of poultry breeding environment in the southeast and southern regions of the country, respectively. It is known that Salmonella ser.…”

Composição química, atividade antimicrobiana e antioxidante do óleo essencial de folhas Myrcia palustris DC. (MYRTACEAE)

“…A atividade antimicrobiana do óleo essencial de M. palustris foi avaliada seguindo as normas do Clinical and Laboratory Standards Institute (CLSI, 2015) e Scur et al, (2014)…”

“…Antes da adição do TTC 0,5% para determinação da CIM foi retirada uma alíquota de 2 μL de cada poço e transferida individualmente para placas de Petri contendo MH agar, que foram incubadas por 24 horas a 36º C. Para determinar CBM ou CFM, ou seja, a menor concentração do oleo essencial capaz de causar a morte do microrganismo, foi observado o crescimento de colônia microbiana na placa (Scur et al, 2014). A CIM e CBM do óleo essencial foram classificados de acordo com os critérios propostos por Sartoratto et al, (2004).…”