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Aeromonas and Plesiomonas species from scarlet ibis (Eudocimus ruber) and their environment: monitoring antimicrobial susceptibility and virulence

2016; Springer Science+Business Media; Volume: 110; Issue: 1 Linguagem: Inglês

10.1007/s10482-016-0771-9

1572-9699

Débora de Souza Collares Maia Castelo‐Branco, Aline Lobão da Silva, Frederico Ozanan Barros Monteiro, Gláucia Morgana de Melo Guedes, Jamille Alencar Sales, Jonathas Sales de Oliveira, José Erisvaldo Maia, Stefânia Araújo Miranda, José Júlio Costa Sidrim, Lucas Pereira de Alencar, Raimunda Sâmia Nogueira Brilhante, Rossana de Aguiar Cordeiro, Tereza de Jesus Pinheiro Gomes Bandeira, Waldemiro de Aquino Pereira Neto, Marcos Fábio Gadelha Rocha,

Microbial infections and disease research

The present study aimed at evaluating the role of captive scarlet ibises (Eudocimus ruber) and their environment as reservoirs of Aeromonas spp. and Plesiomonas spp., and analyzing the in vitro antimicrobial susceptibility and virulence of the recovered bacterial isolates. Thus, non-lactose and weak-lactose fermenting, oxidase positive Gram-negative bacilli were recovered from cloacal samples (n = 30) of scarlet ibises kept in a conservational facility and from water samples (n = 30) from their environment. Then, the antimicrobial susceptibility, hemolytic activity and biofilm production of the recovered Aeromonas spp. and Plesiomonas shigelloides strains were assessed. In addition, the virulence-associated genes of Aeromonas spp. were detected. Ten Aeromonas veronii bv. sobria, 2 Aeromonas hydrophila complex and 10 P. shigelloides were recovered. Intermediate susceptibility to piperacillin-tazobactam and cefepime was observed in 2 Aeromonas spp. and 1 P. shigelloides, respectively, and resistance to gentamicin was observed in 4 P. shigelloides. The automated susceptibility analysis revealed resistance to piperacillin-tazobactam and meropenem among Aeromonas spp. and intermediate susceptibility to gentamicin among P. shigelloides. All Aeromonas isolates presented hemolytic activity, while 3 P. shigelloides were non-hemolytic. All Aeromonas spp. and 3/10 P. shigelloides were biofilm-producers, at 28 °C, while 10 Aeromonas spp. and 6/10 P. shigelloides produced biofilms, at 37 °C. The most prevalent virulence genes of Aeromonas spp. were asa1 and ascV. Scarlet ibises and their environment harbour potentially pathogenic bacteria, thus requiring monitoring and measures to prevent contamination of humans and other animals.