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Nasolacrimal Lavage as a Treatment for Ocular Surface Toxic Soup Syndrome
Published on: April 25, 2025
[Bacteriology of occluded nasolacrimal ducts in infants]
V Prokosch1, J-E Prokosch, J Promesberger
1Universitätsaugenklinik, Universität Münster. verena.prokosch@ukmuenster.de
Insights
Congenital lacrimal duct stenosis (cLDO) frequently involves bacterial infections. Chloramphenicol, fusidic acid, and ciprofloxacin are effective treatments, while erythromycin and gentamicin are not recommended for cLDO.
Area of Science:
- Ophthalmology
- Microbiology
- Pediatrics
Context:
- Congenital lacrimal duct stenosis (cLDO) often leads to bacterial dacryocystitis.
- Current treatment guidelines recommend conservative antimicrobial therapy for infants under six months, followed by lacrimal duct irrigation and silicone tube intubation for older children.
- Understanding the current bacterial spectrum and antibiotic resistance patterns in cLDO is crucial for optimizing treatment strategies.
Purpose:
- To analyze the prevalent bacterial spectrum in congenital lacrimal duct stenosis (cLDO) in children aged 6 to 16 months.
- To compile a bacterial resistogram to guide the selection of appropriate antimicrobial therapy for cLDO.
- To evaluate the efficacy of commonly used antibiotics against isolated bacterial strains from cLDO.
Summary:
- A study of 66 children with cLDO revealed a 97% culture-positive rate, with frequent co-colonization by multiple bacterial strains (87%).
- Gram-positive bacteria, particularly Streptococcus pneumoniae, were most common (72%), followed by Gram-negative rods (85%).
- Chloramphenicol, fusidic acid, and ciprofloxacin demonstrated the highest efficacy, while erythromycin and gentamicin were found to be insufficient.
Impact:
- This research provides an updated bacterial profile and antibiotic sensitivity data for cLDO, aiding clinicians in selecting effective treatments.
- Identifies specific antibiotics (chloramphenicol, fusidic acid, ciprofloxacin) as effective for cLDO, contrasting with less effective options like erythromycin and gentamicin.
- Highlights the importance of microbiological sampling in refractory cLDO cases to ensure targeted antimicrobial therapy and improve patient outcomes.
Background:
Connatal lacrimal duct stenosis (cLDO) commonly causes purulent bacterial dacyrocystitis. The recommended treatment of choice is up to the sixth month of life a conservative antimicrobiological therapy. After the sixth month lacrimal duct irrigation with silicone tube intubation remains the gold standard. Our purpose was to analyse the current bacterial spectrum in cLDO and to compile a bacterial resistogram in order to specify antimicrobiological therapy.
Methods:
66 samples from the lacrimal duct of 6- to 16-month-old children (41 female, 25 male) were obtained by collecting the refluxing liquids with cotton wool swabs after irrigation of the lacrimal drainage system with sterile saline during lacrimal duct surgery. Cultures were incubated aerobically and anaerobically and the infectious agents were isolated. Sensitivity testing was performed for each isolate, testing 8 different commonly used local antibiotics. Data were statistically analysed using SPSS.
Results:
Cultures were positive in cLDO in 97 %, showing co-colonisation in 87 % with up to five bacterial strains. Gram-positive bacteria were seen in 72 % of the isolates in cLDO with Streptococcus pneumoniae (31 %) being the most abundant strain, followed by Staphylococcus aureus (13 %) and S. epidermidis (13 %). In 85 % of the samples at least one Gram-negative rod was present, most often Branhamella (12 %), followed by Haemophilus influenzae (11 %). Sensitivity testing revealed chloramphenicol, fusidic acid and ciprofloxacin/levofloxacin to be the most effective drugs in cLDO, whereas erythromycin and gentamycin turned out to be insufficient in treating cLDO.
Conclusion:
Bacterial colonisation plays a crucial role in cLDO, showing a positive culture in 97 % with frequent co-colonisation of several bacterial strains (often in combination with at least one Gram-negative strain). The sampling of a microbiological probe of the lacrimal duct is recommended at least in therapy-refractory cases. Current bacteria in cLDO can be effectively treated with chloramphenicol, fusidic acid and ciprofloxacin. The commonly used antibiotics erythromycin and gentamicin are inappropriate as monotherapeutics.
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