ArticleInternational ophthalmology2023
The influence of microorganisms on early relapses after external dacryocystorhinostomy.
Article in International ophthalmology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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4 authors at 3 institutions in 2 countries.
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Abstract
purposeUnderstanding the influence of microorganisms in patients with acquired nasolacrimal duct obstruction (NLDO) and investigating their effect on recurrence after external dacryocystorhinostomy (DCR).
methodsThis prospective study included 50 patients. Evaluations were made before, on the first postoperative day and monthly after DCR. Nasolacrimal silicon tubes (NST) were removed after three months. Before the DCR, swab samples were taken from both hands and lower conjunctival fornices and from the lacrimal sac during the first DCR and from the relapsed cases during the second DCR.
resultsGrowth was observed in 90 (45%) cultures out of 200 and a total of 23 different strains were identified altogether. Staphylococcus aureus (40%) and Streptococcus pneumoniae (28%) were dominantly isolated which were all resistant to penicillin, tetracycline and erythromycin. Lacrimal syringing (LS) was successful in patients (100%) on the first postoperative day. After three months, before NST removal, purulent discharge from the punctum was observed in five patients, and blockage was detected by LS. S. pneumoniae was isolated from all five patients' obstructed side conjunctival cultures. Additionally, from their lacrimal sac, S. pneumoniae (4 patients), Capnocytophaga gingivalis, and Candida spp. (1 patient) strains were isolated. S pneumoniae was isolated in four out of five patients from the ipsilateral conjunctival and lacrimal sac cultures which obtained from the subsequent DCR.
conclusionOur results showed that S. pneumoniae was an isolated and persistent strain in cases with early recurrence even after a successful DCR.
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