Microbiological isolates and associated complications of dacryocystitis and canaliculitis in a prominent tertiary ophthalmic teaching hospital in northern China.

BACKGROUND: To report the microbiological isolates, aetiology, complications, antibiotic susceptibilities, and clinical remission of dacryocystitis and canaliculitis in a prominent tertiary ophthalmic teaching and referral hospital located in northern China and to offer appropriate recommendations for preventing and formulating drug treatment strategies. METHODS: This prospective study recruited a total of 477 participants who had been diagnosed with either dacryocystitis or canaliculitis. The cohort comprised 307 patients with chronic dacryocystitis, 111 patients with acute dacryocystitis, and 59 patients with canaliculitis. Purulent discharge from the lacrimal duct was collected using a sterile swab and immediately subjected to microbial culture. Antimicrobial susceptibility testing was conducted following established protocols. All participants were scheduled for follow-up visits within 14 days after receiving antibiotic therapy. RESULTS: The present findings indicated that women exhibited a higher susceptibility to the condition, as evidenced by the occurrence of 367 cases in comparison to 110 cases among men. Among the 477 patients, definitive causes were established in 59 individuals, accounting for 12.4% of the patients. Additionally, ocular complications were reported by 132 patients, representing 27.7% of the total. Monocular involvement was observed in the majority of cases, with 402 out of 477 patients (84.3%) affected, while binocular involvement was present in 75 patients (15.7%). In total, 506 microbiological strains were recovered from 552 eyes, with Staphylococcus epidermidis (16.4%) being the most prevalent microorganism. Other predominant isolates included Corynebacterium macginleyi (9.1%), Staphylococcus aureus (5.1%), Streptococcus pneumoniae (4.9%), Haemophilus (4.4%), Propionibacterium acnes (3.5%), and Eikenella corrodens (3.1%). Among the 12 isolated fungi, Candida parapsilosis accounted for 66.7%. The susceptibility to antimicrobial agents tested in gram-negative bacilli (79.5%) was observed to be higher than that of anaerobic bacteria (76.7%) and gram-positive cocci (55.4%). With pharmacological therapy, the remission rate of acute dacryocystitis (72.7%) was found to be higher than that of canaliculitis (53.3%) and chronic dacryocystitis (42.3%). CONCLUSIONS: This study highlights the microbial spectrum of dacryocystitis and canaliculitis, particularly C.macginleyi, E.corrodens and C.parapsilosis, which are also more frequently isolated. Vancomycin and imipenem may be more effective treatment options. Most cases have an unknown aetiology, and essential preventive measures involve postoperative cleansing of the lacrimal passage following eye and nasal surgeries, as well as the proactive management of rhinitis.

Immunoglobulin G4-related Dacryoadenitis Successfully Treated with Baricitinib.

A 48-year-old woman visited our hospital because of bilateral lacrimal gland enlargement. Her serum immunoglobulin G4 (IgG4) level was high, and positron emission tomography-computed tomography showed significant positive findings in the bilateral lacrimal gland. A biopsy revealed a considerable increase in IgG4/CD138, leading to a diagnosis of IgG4-related dacryoadenitis. The disease did not respond to steroid therapy, so treatment was started with baricitinib because of exacerbation of the original atopic dermatitis and dacryoadenitis after the second dose of the coronavirus disease 2019 (COVID-19) vaccine. Baricitinib was effective for resolving both dermatitis and dacryoadenitis, and steroids were able to be discontinued. The IgG4 level also improved.

Antibiotic utilization in endoscopic dacryocystorhinostomy: a multi-institutional study and review of the literature.

PURPOSE: Utilization of antibiotics for endoscopic dacryocystorhinostomy (endo-DCR) is largely dependent on individual surgeon preference. This study aimed to investigate prescribing practices of pre-, peri-, and postoperative antibiotics and effects on postoperative infection rates in patients who underwent endo-DCR. METHODS: A retrospective chart review of institutional data at two academic centers of endo-DCR cases from 2015-2020 was performed. Postoperative infection rates for patients who received pre-, peri-, and postoperative antibiotics, individually or in combination, and those who did not, were compared via odds ratio and ANOVA linear regression. RESULTS: 331 endo-DCR cases were included; 22 cases (6.6%) had a postoperative infection. There was no significant difference in the infection rates between patients without an active preoperative dacryocystitis who received different permutations of peri- and postoperative antibiotics. Patients who received preoperative antibiotics within two weeks of surgery for preexisting acute dacryocystitis, but did not receive peri- or postoperative antibiotics, had a higher rate of postoperative infections (p = 008). CONCLUSIONS: Our data suggest antibiotics may be beneficial only when patients have a recent or active dacryocystitis prior to surgery. Otherwise, our data do not support the routine use of antibiotic prophylaxis in endo-DCR.

Chronic bilateral dacryoadenitis caused by SARS-CoV-2 infection: a case report.

BACKGROUND: Dacryoadenitis is inflammation of the lacrimal gland, mainly caused by viral infection. It can also be caused by bacterial pathogens and non-infectious processes such as auto-immune diseases and malignancy. Chronic dacryoadenitis is rarely linked to SARS-CoV-2 infection, with only five reports in the literature. REPORT: A 26-year-old Arab woman experienced chronic inflammatory dacryoadenitis after a mild SARS-CoV-2 infection, which was successfully treated with oral prednisone. CONCLUSIONS: Dacryoadenitis can occur due to inflammation caused by either SARS-CoV-2 exposure. The treatment typically involves the administration of steroids, with duration to be decided based on clinical response.

Isolated tubercular dacryoadenitis in a non-immunocompromised healthy adult.

A middle-aged woman presented with a slowly enlarging mass in the right superotemporal orbit and ptosis. The patient had an elevated erythrocyte sedimentation rate, and incisional biopsy showed granulomatous inflammation with Langhan's giant cells suggestive of a tubercular etiology. Tuberculin skin test was negative. The patient responded well to anti-tuberculous therapy. Tubercular dacryoadenitis is a rare presentation of a lacrimal gland mass.

Thymosin ß4 Alleviates Autoimmune Dacryoadenitis via Suppressing Th17 Cell Response.

Purpose: We investigated the therapeutic effect of recombinant thymosin ß4 (rTß4) on rabbit autoimmune dacryoadenitis, an animal model of SS dry eye, and explore its mechanisms. Methods: Rabbits were treated topically with rTß4 or PBS solution after disease onset for 28 days, and clinical scores were determined by assessing tear secretion, break-up time, fluorescein, hematoxylin and eosin staining, and periodic acid-Schiff. The expression of inflammatory mediators in the lacrimal glands were measured by real-time PCR. The expression of T helper 17 (Th17) cell-related transcription factors and cytokines were detected by real-time PCR and Western blotting. The molecular mechanism underlying the effects of rTß4 on Th17 cell responses was investigated by Western blotting. Results: Topical administration of rTß4 after disease onset efficiently ameliorated the ocular surface inflammation and relieved the clinical symptoms. Further analysis revealed that rTß4 treatment significantly inhibited the expression of Th17-related genes (RORC, IL-17A, IL-17F, IL-1R1, IL-23R, and granulocyte-macrophage colony-stimulating factor) and IL-17 protein in lacrimal glands, and meanwhile decreased the inflammatory mediators expression. Mechanistically, we demonstrated that rTß4 repressed the phosphorylation of signal transducer and activator of transcription 3 (STAT3) both in vivo and in vitro. Activation of the STAT3 signal pathway by Colivelin partly reversed the suppressive effects of rTß4 on IL-17 expression in vitro. Conclusions: rTß4 could alleviate ongoing autoimmune dacryoadenitis in rabbits, probably by suppressing Th17 response via partly affecting the STAT3 pathway. These data may provide a new insight into the therapeutic effect and mechanism of rTß4 in dry eye associated with Sjögren's syndrome.

Case Report: Ocular Sporotrichosis-A Seven-Case Series.

Ocular infections associated with sporotrichosis can present four clinical manifestations: granulomatous conjunctivitis, dacryocystitis, Parinaud oculoglandular syndrome, and bulbar conjunctivitis. The incidence of ocular sporotrichosis related to zoonotic transmission has significantly increased in endemic regions and is a frequently misdiagnosed cause of granulomatous conjuntivitis. Therefore, we present a series of seven cases of eye injury by Sporothrix strains, including clinical forms, therapeutic approaches, and laboratory procedures to alert health professionals who provide care to these patients.

Lacrimal Drainage Infections with Sphingomonas paucimobilis: Clinical Presentations, Complications and Outcomes.

PURPOSE: To report the clinical presentations, complications, and outcomes of Sphingomonas paucimobilis-specific lacrimal drainage infections. METHODS: A retrospective chart review of all patients diagnosed with Sphingomonas paucimobilis lacrimal infections and managed at a tertiary care Dacryology Service from November 2015 to May 2022 over a 6.5-year period were recruited and analyzed. Data collected include demographic details, clinical presentation, microbiological diagnosis, antibiotic susceptibility profiles, management, complications, and outcomes. The microbiological techniques employed were aerobic and anaerobic cultures, phenotypic identification with VITEK 2R system, polymerase chain reaction, antibiotic sensitivity profile and minimal inhibitory concentration. RESULTS: Twelve Sphingomonas-specific lacrimal drainage infections of 11 patients were identified. Of these five were canaliculitis and seven were acute dacryocystitis. All the seven acute dacryocystitis presented in an advanced stage; five were with lacrimal abscess and two with orbital cellulitis. The antibiotic susceptibility profile of canaliculitis and acute dacryocystitis were comparable and the organism was sensitive to several classes of antibiotics. The outcomes of punctal dilatation and nonincisional curettage were effective for canaliculitis. Patients with acute dacryocystitis had advanced clinical stage at presentation but responded well to intensive systemic management and had excellent anatomical and functional outcomes with dacryocystorhinostomy. CONCLUSION: Sphingomonas-specific lacrimal sac infections can have aggressive clinical presentations and need early and intensive therapy. The outcomes are excellent with multimodal management.

Spontaneous regression of immunoglobulin G4-related dacryoadenitis and multiple organ involvement: A case report.

PURPOSE: Immunoglobulin G4 (IgG4)-related dacryoadenitis is rarely resolved spontaneously without steroids. Here, we report a case of IgG4-related dacryoadenitis and extra-ophthalmic lesions with spontaneous regression. METHODS: This is a clinical case report. A 56-years-old man had a 1-year and 7-month-old histories of neck and eyelid swelling, respectively. On the first examination, the lacrimal and submandibular glands were palpable bilaterally. Computed tomographic images showed enlargement of the lacrimal gland on both sides, right pulmonary hilar lymph node, and pancreas, and thickening of the abdominal aortic wall. Blood tests demonstrated elevated serum IgG4 level and positive hepatitis B surface antibody. Pathological examination of the biopsied lacrimal gland specimens revealed marked IgG4-positive plasma cell infiltration. RESULTS: The patient was monitored carefully without steroid administration. Serum IgG4 level had gradually decreased during follow-up period and reached the normal range 3 years after the biopsy. At 4-year follow-up, the lacrimal and submandibular glands were not palpable on either side. Computed tomographic images demonstrated no enlargement of the lacrimal gland, submandibular gland, or lymph nodes, and improvement of the enlarged pancreas and thickened abdominal aortic wall. CONCLUSION: Our case indicates that careful observation can be an option in selected cases with risks of steroid treatment or silent clinical course.

New Onset Isolated Granulomatous Dacryoadenitis During Etanercept Therapy.

Anti-tumor necrosis factor alpha (TNF- α) biological agents can rarely cause sarcoid-like granulomatosis. A 20-year-old woman presented with a 1-month history of painful left upper eyelid swelling. She was on subcutaneous etanercept and methotrexate for 1 year for juvenile idiopathic arthritis. Imaging showed diffuse enlargement of the left and minimal enlargement of the right lacrimal gland. There was no finding in favor of sarcoidosis on systemic evaluation. Incisional biopsy of the left lacrimal gland revealed non-caseating granulomatous dacryoadenitis. The findings showed significant regression 1 month after cessation of Etanercept therapy. To the best of our knowledge, this report illustrates the first case of an isolated granulomatous dacryoadenitis during TNF-α antagonist therapy.

Systemic eosinophilic disease presenting as dacryoadenitis.

Eosinophilic disease with orbital involvement is rare. We present two patients with dacryoadenitis associated with local and systemic eosinophilia. A 32-year-old man presented with episodic dacryoadenitis, lower respiratory inflammation and peripheral eosinophilia. Lung and lacrimal gland biopsies demonstrated eosinophilic infiltrate without granuloma, necrosis, or vasculitis. He improved with oral corticosteroids and Mepolizumab, an IL-5 inhibitor. The second case involved a 33-year-old man who similarly presented with episodic dacryoadenitis, pulmonary inflammation and pain/swelling in the hands and feet. Lacrimal gland biopsy demonstrated a predominantly eosinophilic infiltrate without granuloma or vasculitis. Symptoms improved with oral corticosteroids. Although neither patient was provided a definitive diagnosis, both were determined to have an eosinophilic condition on the spectrum of eosinophilic asthma or eosinophilic granulomatosis with polyangiitis.

Multi-resistant Enterobacter cloacae dacryocystitis and preseptal cellulitis: case and review of literature.

A 61-year-old man with no significant past medical history presented to a quaternary ophthalmic referral center with acute right-sided medial canthal pain, periorbital edema, and erythema despite oral antibiotic therapy. CT imaging confirmed the presence of right preseptal cellulitis and lacrimal sac aspiration identified Enterobacter cloacae. A diagnosis of acute right-sided dacryocystitis with preseptal cellulitis was made. He was successfully treated with broadening of antibiotic therapy to intravenous meropenem. Symptomatic resolution was noted on follow-up without evidence of disease recurrence. This unusual case of Enterobacter cloacae dacryocystitis and preseptal cellulitis highlights the increasing prevalence and challenges of treating these uncommon organisms.

[Susceptibility of drug-resistant staphylococci isolated from different parts of the ocular anterior segment to common ophthalmic antibiotics].

Objectie To investigate the susceptibility of drug-resistant staphylococci isolated from different parts of the anterior segment to levofloxacin, tobramycin, cefazolin sodium, fusidic acid and clindamycin. Methods: Experimental Study. A total of 67 patients with anterior segment infection (33 cases of conjunctivitis, 6 cases of bacterial keratitis, 7 cases of blepharitis, 9 cases of neonatal dacryocystitis, 9 cases of neonatal dacryocystitis, 1 case of adult dacryocystitis and 11 cases of other infectious eye diseases) were collected from the conjunctival sac, cornea, eyelid margin and lacrimal sac. Minimum inhibitory concentration (MIC) determination of methicillin-resistant Staphylococcus (MRS) strains and ß-lactamase-producing (ß-Lac) strains by a micro-liquid-based method, according to the M100 standard of the American Institute for Clinical and Laboratory Standardization Susceptibility and resistance determinations were made. Data were statistically analyzed using Chi-square or Fisher's exact test. Results: Thirty-five MRS, 30 ß-Lac and 2 ß-Lac MRS isolates were identified from 67 multidrug-resistant Staphylococcus . There were 3, 9, 4, and 19 MRS isolates isolated from the lacrimal sac, cornea, eyelid margin and conjunctival sac, accounting for 3/4, 9/12, 4/8, 19/43 (44.2%) of the isolated sites respectively. There were 1, 3, 3, and 23 ß-Lac isolates, accounting for 1/4, 3/12, 3/8 and 23/43 (53.5%) of the isolated sites, respectively. The highest proportion of ß-Lac isolates isolated from patients with a diagnosis of conjunctivitis was 17 (25.3%) from the conjunctival sac. Among the MRS strains isolated from the cornea and lacrimal sac, 5 (7.5%) and 3 (4.5%) were from patients diagnosed with bacterial keratitis and neonatal tear, respectively. The number of MRS strains and ß-Lac isolates isolated from patients with a diagnosis of blepharitis were both 3 (4.5%) from the lid margin.Among the strains isolated from the eyelid margin and the conjunctival sac, drug-resistant Staphylococcus epidermidis was the main strain, the drug-resistant Staphylococcus aureus was the major isolates in lacrimal sac and cornea. Among the 35 MRS isoaltes, 25, 24, 12, 12, and 11 were sensitive to cefazolin sodium, fusidic acid, levofloxacin, clindamycin and tobramycin, and the sensitivity rates were 71.4%, 68.6%, 34.3%, 34.3% and 31.4%, the difference was statistically significant (χ2=22.756, P<0.001), The sensitivity rates of levofloxacin, tobramycin, cefazolin sodium, fusidic acid and clindamycin against MRS isolates from the anterior segment were both statistically significant differences (χ2=18.493, 11.594, 8.906, 9.841, 16.059; all P<0.05). The susceptibility rates of MRS isolates against five antibiotics was statistically significant differences (χ2=33.080, P<0.001). Among the 30 ß-Lac isolates, 27, 22, 19, 16, and 8 were sensitive to cefazolin sodium, fusidic acid, levofloxacin, tobramycin and clindamycin, and the sensitivity rates were 90.0 % , 73.3%, 63.3%, 53.3% and 26.7%, the difference was statistically significant (χ2=28.280, P<0.001). The sensitivity rates of five antibiotics against ß-Lac isolates from the anterior segment were both statistically significant differences (χ2=50.971, 24.543, 48.147, 44.899, 18.676; all P<0.001). The susceptibility rates of ß-Lac isolates against five antibiotics was statistically significant differences (χ2=23.383, P<0.001). The sensitivity of cefazolin sodium and fusidic acid against ß-Lac isolates were higher than MRS isolates. Conclusions: Cefazolin sodium and fusidic acid may be the best choice for the treatment of drug-resistant Staphylococcus isolated from anterior conjunctival sac, cornea, eyelid margin and lacrimal sac, especially for ß-Lac-producing drug-resistant Staphylococcus infection.

PPAR-α Agonist Fenofibrate Ameliorates Sjögren Syndrome-Like Dacryoadenitis by Modulating Th1/Th17 and Treg Cell Responses in NOD Mice.

Purpose: To investigate the effects and mechanisms of fenofibrate, a synthetic ligand of peroxisome proliferator-activated receptor α (PPAR-α), on autoimmune dacryoadenitis in a mouse model of Sjögren syndrome (SS) dry eye. Methods: Male nonobese diabetic (NOD) mice were fed chow with or without 0.03% fenofibrate for 8 weeks, and clinical scores were determined by assessing tear secretion, fluorescein, and hematoxylin and eosin staining. Intracellular IFN-γ, IL-17, and Foxp3 in CD4+ T cells were measured by flow cytometry. The expressions of Th1, Th17, and Treg cell-related transcription factors and cytokines were detected by real-time PCR. The levels of PPAR-α and liver X receptor ß (LXR-ß) were detected with real-time PCR and Western blotting. Results: Fenofibrate efficiently diminished the lymphocytic inflammation in lacrimal glands (LGs), increased tear secretion, and decreased corneal fluorescein staining in NOD mice. Meanwhile, treatment of fenofibrate evidently reduced the proportion of Th1 and Th17 cells and increased the proportion of Treg cells in vivo and vitro, together with decreased expression of T-bet, IFN-γ, RORγt, and IL-17, as well as increased expression of Foxp3 and TGF-ß1 in LGs. Furthermore, fenofibrate significantly upregulated the expressions of PPAR-α and LXR-ß at the protein and mRNA levels. Conclusions: Fenofibrate potently attenuated LG inflammation in a model of autoimmune dry eye, and this effect might partially result from regulating Th1/Th17/Treg cell responses by activating PPAR-α/LXR-ß signaling. These data suggest that fenofibrate may be a novel class of therapeutic agent for SS-associated dacryoadenitis.