• Sunarno Sunarno, Yuni Rukminiati, and Ratih Dian Saraswati.
• Center for Research and Development of Biomedical and Basic Health Technology, National Institute of Health Research and Development, Ministry of Health, Jakarta, Indonesia
• Turk J Med Sci. 2020 Feb 13; 50 (1): 267-270.

Background/AimThe aim of this study was to find out characteristics and patterns of the spread of Corynebacterium diphtheriae isolated from Jakarta and the surrounding areas, using the whole genome sequencing (WGS) technique and multilocus sequence typing (MLST) approach.Materials And MethodsThe study samples consisted of 86 C. diphtheriae isolates, which were isolated from diphtheria patients and close contacts of patients. The DNA sequencing was carried out using the WGS technique. Data conversion applied the U-gene software. Molecular typing was conducted through the MLST approach, then followed by online data analysis.ResultsThe results showed that as many as 43 (50%) of all samples examined were new types with the same allele profile, namely 9-1- 13-4-3-3-4. New sequence type C. diphtheriae is registered in the MLST global database as ST534 based on the allele profile. The tox gene analysis in 43 isolates with ST534 indicated that there were three mutation positions, all of which were silent mutations.ConclusionThe main cause of diphtheria in Jakarta and the surrounding areas is a new sequence type of C. diphtheriae registered as ST534.This work is licensed under a Creative Commons Attribution 4.0 International License.

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