Normalization of Conjunctival Flora After Dacryocystorhinostomy

Abstract

A few weeks is needed for the conjunctival flora to normalize after dacryocystorhinostomy. The time of normalization is related to the type of bacteria, colony count, and presence of silicone tube.

Bacteriological profile in conjunctival, lacrimal sac, and nasal specimens and conjunctival normalization time following external, endoscopic, and transcanalicular multidiode laser dacryocystorhinostomy

“…Owji et al (15) reported that microorganism growth rates in samples from the lacrimal sac and involved and contralateral sides of the conjunctiva in a group of patients with NLDO and chronic dacryocystitis were 100%, 100%, and 97.5, respectively, while those in samples from the conjunctiva of healthy subjects was 82.5%. The same organism was isolated from the lacrimal sac and conjunctiva of the involved side in 90% of patients.…”

“…Coden et al (17) evaluated culture samples from purulent lacrimal sac contents in 236 patients with dacryocystitis who were undergoing DCR and reported that the most common bacteria were S. epidermidis (27.3%) and S. aureus (22.1%), with a positive culture rate of 52%. Owji et al (15) studied lacrimal sac cultures from the involved side and conjunctival cultures from the involved and normal sides of patients with NLDO and chronic dacryocystitis, and they found that the most frequently isolated organisms from the lacrimal sac and conjunctiva of the involved side were S. aureus (47.5% and 47.5%, respectively) and S. epidermidis (22.5% and 20%, respectively). On the other hand, the most frequently isolated organisms from the conjunctiva of the normal side and from that of the control healthy subjects were S. epidermidis (60% and 60%, respectively) and S. aureus (47.5% and 30%, respectively) (15) .…”

“…Owji et al (15) studied lacrimal sac cultures from the involved side and conjunctival cultures from the involved and normal sides of patients with NLDO and chronic dacryocystitis, and they found that the most frequently isolated organisms from the lacrimal sac and conjunctiva of the involved side were S. aureus (47.5% and 47.5%, respectively) and S. epidermidis (22.5% and 20%, respectively). On the other hand, the most frequently isolated organisms from the conjunctiva of the normal side and from that of the control healthy subjects were S. epidermidis (60% and 60%, respectively) and S. aureus (47.5% and 30%, respectively) (15) . Pradeep et al (18) reported that the most common isolates from lacrimal sac specimens in chronic dacryocystitis cases were CNS and S. aureus (71% and 14%, respectively).…”

“…In a study on 40 consecutive adult NLDO patients by Owji et al (15) , the mean conjunctival normalization time after EX-DCR was 4.5 (range, [3][4][5][6][7][8] weeks. While the authors reported significant associations among normalization times, type of organism isolated from the lacrimal sac (particularly anaerobes and Streptococcus), a colony count of ≥10 3 , and presence of a silicone tube, they found no relationship between normalization times and the presence or duration of epiphora or the presence of previous attacks of acute dacryocystitis (15) .…”

“…The microbiological properties of the lacrimal sac in PANDO patients has been a topic of interest in recent years as the spectrum of organisms constituting the lacrimal flora appears to have changed due to many factors (11,14,15) . Despite a large number of comparative studies on DCR, none have previously compared three separate methods in terms of microbiological findings.…”