Mycetoma Caused by Nocardia yamanashiensis, Papua New Guinea

Oriol Mitjà Lihir Medical Centre - International SOS, Lihir Island, Papua New Guinea; Sullivan Nicolaides Pathology, Brisbane, Australia; Barcelona Centre for International Health Research/Hospital Clínic/University of Barcelona, Spain

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Russell Hays Lihir Medical Centre - International SOS, Lihir Island, Papua New Guinea; Sullivan Nicolaides Pathology, Brisbane, Australia; Barcelona Centre for International Health Research/Hospital Clínic/University of Barcelona, Spain

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Christian Van Straten Lihir Medical Centre - International SOS, Lihir Island, Papua New Guinea; Sullivan Nicolaides Pathology, Brisbane, Australia; Barcelona Centre for International Health Research/Hospital Clínic/University of Barcelona, Spain

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Jenny Robson Lihir Medical Centre - International SOS, Lihir Island, Papua New Guinea; Sullivan Nicolaides Pathology, Brisbane, Australia; Barcelona Centre for International Health Research/Hospital Clínic/University of Barcelona, Spain

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Murray Koka Lihir Medical Centre - International SOS, Lihir Island, Papua New Guinea; Sullivan Nicolaides Pathology, Brisbane, Australia; Barcelona Centre for International Health Research/Hospital Clínic/University of Barcelona, Spain

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Quique Bassat Lihir Medical Centre - International SOS, Lihir Island, Papua New Guinea; Sullivan Nicolaides Pathology, Brisbane, Australia; Barcelona Centre for International Health Research/Hospital Clínic/University of Barcelona, Spain

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We report the first documented case of a mycetoma caused by Nocardia yamanashiensis after the initial description of this species. The 16S-rRNA gene sequence analysis was used to identify the novel species, which showed a similarity of 99.9% to the gene sequence of the type strain. The case showed both clinical non-response and reduced susceptibility in vitro to amoxicillin plus clavulanate, and it was treated successfully with trimethoprim-sulfamethoxazole and doxycycline. Given antibiotic resistance concerns, we suggest that antimicrobial susceptibility testing should be done for the majority of Nocardia species without well-established resistance patterns.

Author Notes

*Address correspondence to Oriol Mitjà, Department of Medicine, Lihir Medical Centre, PO Box 34, Lihir Island, NIP, Papua New Guinea. E-mail: oriolmitja@hotmail.com

Financial support: This work was supported by InternationalSOS (Australasia) Pty Ltd., and Newcrest Mining (NML).

Disclosure: The patient provided signed consent authorizing publication of the case and images. Molecular identification was performed at the Mycobacterium Reference Laboratory, Queensland Health Scientific Services, Herston, Queensland, Australia.

Authors’ addresses: Oriol Mitjà, Russell Hays, Christian Van Straten, and Murray Koka, Department of Medicine, Lihir Medical Centre, Lihir Island, Papua New Guinea, E-mails: oriolmitja@hotmail.com, rhays@ozemail.com.au, cjvanstraten@hotmail.com, and MurrayJohn.koka@newcrest.com.au. Jenny Robson, Department of Microbiology, Sullivan Nicolaides Pathology, Brisbane, Australia, E-mail: jrobson@snp.com.au. Quique Bassat, Barcelona Centre for International Health Research (CRESIB), Hospital Clinic/University of Barcelona, Barcelona, Spain, E-mail: quique.bassat@cresib.cat.

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