Research Article
Volume 12 Issue 9 - 2021
Prevalence of Ocular Demodex Infestation among Cataract Surgery Cases
Samuel J Avalos-Lara1, Andric C Pérez-Ortiz2, Bani Antonio-Aguirre3, Andrea Bardán-Duarte4, Héctor Javier Pérez-Cano5 and Claudia Palacio-Pastrana1*
1Fundación Hospital Nuestra Señora de la Luz, I.A.P, Departamento de Microcirugía del Segmento Anterior del Ojo, Ciudad de México, Mexico
2Transplant Center, Massachusetts General Hospital, Fruit St, Boston MA, United States
3Johns Hopkins Bloomberg School of Public Health, N Wolfe St, Baltimore, United States
4Escuela de Medicina, Universidad Panamericana, Ciudad de México, Mexico
5Fundación Hospital Nuestra Señora de la Luz, I.A.P, Centro de Investigación, Ciudad de México, Mexico
*Corresponding Author: Claudia Palacio-Pastrana, Fundación Hospital Nuestra Señora de la Luz, I.A.P, Departamento de Microcirugía del Segmento Anterior del Ojo, Ciudad de México, Mexico.
Received: May 28, 2021; Published: August 28, 2021


Purpose: Demodex infestation is associated with increased ocular surface inflammation. In patients undergoing cataract surgery, high counts of Demodex mites may increase the risk of perioperative complications. The objective was to evaluate the prevalence of Demodex infestation, as well as, host related factors and surgical complications in cataract surgery candidates.

Methods: 150 cataract patients, scheduled for surgery, were evaluated for Demodex spp. 4 to 8 eyelashes were obtained by depilation and they were observed under an optical microscope to quantify the number of mites present. The prevalence was calculated and an adjustment was made using logistic regression models with the SAS V9.4 program.

Results: Demodex prevalence was 67.6% (95%CI 63.7 - 75.2), which is significantly higher to prior reports among elderly Hispanics (50 years or older, p < 0.0001) and one report in similarly aged individuals (p < 0.0001). Moreover, it was age-dependent ranging from 5.9% in 40-50 up to 32.7% in 70 - 80 years old. Surgical complication rates were not significantly different between exposed and unexposed cases.

Conclusion: Demodicosis prevalence among the elderly is significantly higher among those evaluated and undergoing cataract surgery. Despite not finding postoperative complications due to the exhaustive control in surgical practice, it is important to search for Demodex prior to surgery to prevent postoperative complications.

Keywords: Demodex; Ocular Infestation; Blepharitis; Prevalence; Cross-Sectional Study; Cataract Surgery


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Citation: Claudia Palacio-Pastrana., et al. “Prevalence of Ocular Demodex Infestation among Cataract Surgery Cases”. EC Ophthalmology 12.9 (2021): 08-15.

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