{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,22]],"date-time":"2026-07-22T04:03:59Z","timestamp":1784693039690,"version":"3.55.0"},"reference-count":75,"publisher":"SAGE Publications","issue":"5","license":[{"start":{"date-parts":[[2019,5,30]],"date-time":"2019-05-30T00:00:00Z","timestamp":1559174400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Microbial Drug Resistance"],"published-print":{"date-parts":[[2019,6,1]]},"abstract":"<jats:p>\n                    Asymptomatic bacteriuria (ASB) has been consistently observed in pregnancy. However, there is a paucity of data on the prevalence and characteristics of extended-spectrum \u03b2-lactamase (ESBL)-producing Enterobacteriaceae in ASB in pregnant women. Therefore, we sought to investigate ESBL-producing and multidrug-resistant Enterobacteriaceae in antenatal women with ASB. Urine samples were collected from 310 asymptomatic pregnant women attending primary antenatal clinics and screened for significant bacteriuria. Isolates of Enterobacteriaceae were phenotypically tested for their ESBL production. ESBL genes (CTX-M, TEM, and SHV genes) were then amplified by polymerase chain reaction (PCR). Multiplex PCRs were used to perform phylogenetic typing of ESBL-producing\n                    <jats:italic toggle=\"yes\">Escherichia coli<\/jats:italic>\n                    isolates and to examine the commonality of sequence type 131 (ST131)-O25b and ST131-O16. A total of 103 (33.2%) pregnant women were positive for significant bacteriuria (80 Enterobacteriaceae). Of these isolates, 32.5% (\n                    <jats:italic toggle=\"yes\">n<\/jats:italic>\n                    \u2009=\u200926) were ESBL producers and had a higher rate of multidrug resistance than non-ESBL producers. Genotypic characterization of ESBL-producing isolates showed that 84.6% had the\n                    <jats:italic toggle=\"yes\">bla<\/jats:italic>\n                    <jats:sub>CTX-M<\/jats:sub>\n                    gene (\n                    <jats:italic toggle=\"yes\">bla<\/jats:italic>\n                    <jats:sub>CTX-M-15<\/jats:sub>\n                    \u2009=\u200977.3%;\n                    <jats:italic toggle=\"yes\">bla<\/jats:italic>\n                    <jats:sub>CTX-M-9<\/jats:sub>\n                    \u2009=\u200918.2%). None of the isolates were of the TEM or SHV type. Half of the ESBL-producing\n                    <jats:italic toggle=\"yes\">E. coli<\/jats:italic>\n                    isolates were of the phylogroup B2, and 4 (20%) isolates were of the ST131-O16 clonal subgroup. This study is the first in Egypt to provide evidence for the high prevalence of ESBL-producing Enterobacteriaceae in pregnant women with ASB. It also represents an important step toward genotypic characterization of this resistant form of bacteria, which may be useful for future antimicrobial studies.\n                  <\/jats:p>","DOI":"10.1089\/mdr.2018.0088","type":"journal-article","created":{"date-parts":[[2019,1,24]],"date-time":"2019-01-24T14:52:13Z","timestamp":1548341533000},"page":"731-738","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":10,"title":["Phenotypic and Genotypic Characterization of Extended-Spectrum \u03b2-Lactamase-Producing Enterobacteriaceae in Asymptomatic Bacteriuria in Pregnancy"],"prefix":"10.1177","volume":"25","author":[{"given":"Mariam M.","family":"Youssef","sequence":"first","affiliation":[{"name":"Department of Medical Microbiology and Immunology, Faculty of Medicine, Minia University, Minia, Egypt."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hazim A.","family":"Rizk","sequence":"additional","affiliation":[{"name":"Department of Medical Microbiology and Immunology, Faculty of Medicine, Minia University, Minia, Egypt."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Noha A.","family":"Hassuna","sequence":"additional","affiliation":[{"name":"Department of Medical Microbiology and Immunology, Faculty of Medicine, Minia University, Minia, Egypt."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2019,5,30]]},"reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.7453\/gahmj.2013.061"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1086\/427507"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1080\/09674845.2006.11732734"},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.2105\/AJPH.84.3.405"},{"key":"e_1_3_2_6_2","doi-asserted-by":"publisher","DOI":"10.1080\/14767050802360783"},{"key":"e_1_3_2_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/S1473-3099(15)00070-5"},{"key":"e_1_3_2_8_2","unstructured":"National Collaborating Centre for Women's and Children's Health (UK). 2008. 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