Aspergillosis in a colony of Humboldt penguins (Spheniscus humboldti) in a french zoological park: evaluation of environmental exposure

Bralet, Tristan; Risco-Castillo, Veronica; Valsecchi, Isabel; Laidebeure, Sylvie; Sailler, Anaïs; Lécu, Alexis; Botterel, Françoise; Guillot, Jacques; Arné, Pascal; Jouvion, Grégory

doi:10.1007/s11259-023-10220-z

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“…Of note, neither selective media for detection of Acinetobacter spp., nor culture-independent techniques for the detection of Acinetobacter species were used. Nevertheless, while most studies focused on the direct or indirect detection of microorganisms in wild or captive Humboldt penguins have been addressed to pathogenic issues [ 44–46 ], in one study describing the gut microbiota of captive Humboldt penguins, the presence of Acinetobacter spp. ranked among the taxa with the highest relative abundance [ 47 ].…”

Section: Discussionmentioning

confidence: 99%

Clonal dissemination of Acinetobacter radioresistens among Humboldt penguins (Spheniscus humboldti) inhabiting a barren northern Peruvian island

Roca,

Espinoza,

Irigoin-Lovera

et al. 2024

EuJMI

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Acinetobacter spp. are often isolated from natural sources, but knowledge about their presence in wild animals is fragmented and uncomplete. The present study aimed to characterize a series of Acinetobacter radioresistens isolated from Humboldt penguins (Spheniscus humboldti). Fifteen Humboldt penguins from an inhabited northern Peruvian island were sampled. Microorganisms were identified by MALDI-TOF MS. Antibiotic susceptibility to 12 antimicrobial agents was established, and clonal relationships were determined. A representative isolate was selected for whole genome sequencing (WGS). A. radioresistens were isolated from the feces of 12 (80%) Humboldt penguins, being susceptible to all the antimicrobial agents tested, except eight cefotaxime-intermediate isolates. All A. radioresistens were clonally related. WGS showed that the isolate belonged to ST1972, the presence of two chromosomal encoded carbapenemases (blaOXA-23 and a putative subclass B3 metallo-β-lactamase), and a series of point mutations in antibiotic-resistance related chromosomal genes, which were considered as polymorphisms. In addition, a few virulence factors, including a capsule-encoding operon, superoxide dismutases, catalases, phospholipases and a siderophore receptor were identified. The present results suggest that A. radioresistens may be a common member of the gut microbiota of Humboldt penguins, but further studies in other geographical areas are needed to establish this finding.

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Section: Discussionmentioning

confidence: 99%