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The aim of this study was to characterize ESBL-producing <jats:italic>K. pneumoniae<\/jats:italic> detected within and between two hospitals in uMgungundlovu district, South Africa, using whole genome sequencing (WGS). An observational period prevalence study on antibiotic-resistant ESKAPE (i.e. <jats:italic>Enterococcus faecium<\/jats:italic>, <jats:italic>Staphylococcus aureus<\/jats:italic>, <jats:italic>Klebsiella pneumoniae<\/jats:italic>, <jats:italic>Acinetobacter baumannii<\/jats:italic>, <jats:italic>Pseudomonas aeruginosa<\/jats:italic>, <jats:italic>Enterobacter spp<\/jats:italic>.) bacteria was carried out in hospitalized patients during a two-month period in 2017. Rectal swabs and clinical specimens were collected from patients hospitalized and were screened for ESBL-producing, Gram-negative ESKAPE bacteria using cefotaxime-containing MacConkey agar and ESBL combination disk tests. Nine confirmed ESBL-<jats:italic>K. pneumoniae<\/jats:italic> isolated from six patients and two hospitals were whole genome sequenced using an Illumina MiSeq platform. Genome sequences were screened for presence of integrons, insertion sequences, plasmid replicons, CRISPR regions, resistance genes and virulence genes using different software tools. Of the 159 resistant Gram-negative isolates collected, 31 (19.50%) were ESBL-producers, of which, nine (29.03%) were ESBL-<jats:italic>K. pneumoniae<\/jats:italic>. The nine <jats:italic>K. pneumoniae<\/jats:italic> isolates harboured several \u03b2-lactamase genes, including <jats:italic>bla<\/jats:italic><jats:sub>CTX-M-15<\/jats:sub>, <jats:italic>bla<\/jats:italic><jats:sub>TEM-1b<\/jats:sub>, <jats:italic>bla<\/jats:italic><jats:sub>SHV-1<\/jats:sub>, <jats:italic>bla<\/jats:italic><jats:sub>OXA-1<\/jats:sub> concomitantly with many other resistance genes e.g. <jats:italic>acc<\/jats:italic>(6\u2032)-lb-cr, <jats:italic>aad<\/jats:italic>AI6, <jats:italic>oqx<\/jats:italic>A and <jats:italic>oqx<\/jats:italic>B that confer resistance to aminoglycosides and\/or fluoroquinolones, respectively. Three replicon plasmid types were detected in both clinical and carriage isolates, namely ColRNAI, IncFIB(K), IncF(II). Sequence type ST152 was confirmed in two patients (one carriage isolate detected on admission and one isolate implicated in infection) in one hospital. In contrast, ST983 was confirmed in a clinical and a carriage isolate of two patients in two different hospitals. Our data indicate introduction of ESBL-producing <jats:italic>K. pneumoniae<\/jats:italic> isolates into hospitals from the community. We also found evidence of nosocomial transmission within a hospital and transmission between different hospitals. The Clustered Regularly Interspaced Palindromic Repeats (CRISPR)-associated <jats:italic>cas<\/jats:italic>3 genes were further detected in two of the nine ESBL-KP isolates. This study showed that both district and tertiary hospital in uMgungundlovu District were reservoirs for several resistance determinants and highlighted the necessity to efficiently and routinely screen patients, particularly those receiving extensive antibiotic treatment and long-term hospitalization stay. It also reinforced the importance of infection, prevention and control measures to reduce the dissemination of antibiotic resistance within the hospital referral system in this district.<\/jats:p>","DOI":"10.1038\/s41598-019-42672-2","type":"journal-article","created":{"date-parts":[[2019,4,18]],"date-time":"2019-04-18T10:08:13Z","timestamp":1555582093000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":60,"title":["Whole Genome Sequencing of Extended Spectrum \u03b2-lactamase (ESBL)-producing Klebsiella pneumoniae Isolated from Hospitalized Patients in KwaZulu-Natal, South Africa"],"prefix":"10.1038","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9866-2103","authenticated-orcid":false,"given":"Raspail Carrel","family":"Founou","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luria Leslie","family":"Founou","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9875-6716","authenticated-orcid":false,"given":"Mushal","family":"Allam","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arshad","family":"Ismail","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sabiha Yusuf","family":"Essack","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2019,4,18]]},"reference":[{"key":"42672_CR1","doi-asserted-by":"publisher","first-page":"1881","DOI":"10.3389\/fmicb.2016.01881","volume":"7","author":"L Founou","year":"2016","unstructured":"Founou, L., Founou, R. & Essack, S. 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