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This case series reports the clinical presentation of seven infants diagnosed with congenital syphilis in Lusaka, Zambia.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Case presentations<\/jats:title>\n                <jats:p>The cases in this series were incidental findings from a cohort of infants enrolled in a rotavirus vaccine immunogenicity study recruiting infants at 6 weeks of age. As part of clinical care for enrolled participants, we screened mothers of children who presented with adverse events of (i) repeated upper respiratory tract infections\/coryza, (ii) skin lesions, and (iii) poor weight gain, for syphilis using rapid plasma reagin test. From a cohort of 214 mother\u2013infant pairs enrolled between September and December 2018, a total of 115 (44.4%) of the mothers reported to have not been screened during antenatal care. Of these, four (3.5%) reported to have tested positive; and only two received treatment. Seven out of 57 (26.6%) children meeting the screening criteria had a positive rapid plasma reagin test result. The mean age at diagnosis was 4.5\u00a0months (1.3 months standard deviation), and the common presenting features included coryza (6\/7), skin lesions (4\/7), conjunctivitis (3\/7), pallor\/anemia (5\/7), wasting (2\/7), and underweight (5\/7). Three of the seven infants were exposed to human immunodeficiency virus. Following diagnosis, all seven cases received standard treatment according to national treatment guidelines. That is, 6\/7 cases received inpatient care with benzylpenicillin for 10 days, while 1\/7 was treated as an outpatient and received daily procaine penicillin for 10 days.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>These findings suggest that, though screening for syphilis is part of the standard antenatal care in Zambia, it is not offered optimally. There is urgent need to address programmatic shortcomings in syphilis screening and treatment to avoid long-term sequelae. Additionally, clinicians need to raise their index of suspicion and rule out syphilis when confronted with these clinical symptoms, regardless of the mother\u2019s human immunodeficiency virus status.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s13256-021-02745-1","type":"journal-article","created":{"date-parts":[[2021,3,31]],"date-time":"2021-03-31T23:06:26Z","timestamp":1617231986000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Clinical presentation of congenital syphilis in a rotavirus vaccine cohort study in Lusaka: a case series"],"prefix":"10.1186","volume":"15","author":[{"given":"Nsofwa","family":"Sukwa","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7348-2835","authenticated-orcid":false,"given":"Michelo","family":"Simuyandi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masuzyo","family":"Chirwa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yvonne Mutombo","family":"Kumwimba","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Obvious N.","family":"Chilyabanyama","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Natasha","family":"Laban","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ayb\u00fcke","family":"Koyuncu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Roma","family":"Chilengi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2021,4,1]]},"reference":[{"key":"2745_CR1","first-page":"283","volume":"68","author":"DL Brown","year":"2003","unstructured":"Brown DL, Frank JE. 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Written informed consent was obtained from the parents of the participants, and a copy of the written consent is available on request for review by the Editor-in-Chief of this journal.","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Written informed consent was obtained from the respective patient\u2019s legal guardians for publication of this case series report and any accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent statement"}},{"value":"Consent for publication was sought from the National Health Research Authority of Zambia.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors declare that they have no competing interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"149"}}