Systematic review of the incidence of post-operative trichiasis in Africa

Mwangi, Grace; Courtright, Paul; Solomon, Anthony W.

doi:10.1186/s12886-020-01564-0

Cited by 11 publications

(6 citation statements)

References 37 publications

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“…Second, there has been a high recurrence rate of trichiasis after surgical correction. 35 Third, even after no infections can be detected at the population level, inflammation in children’s conjunctivae may continue to occur. 36 Fourth, the relationship between environmental factors and trachoma are poorly understood and, in some areas, environmental corrections have failed to yield the expected impact.…”

Section: Introductionmentioning

confidence: 99%

Model-based geostatistics enables more precise estimates of neglected tropical-disease prevalence in elimination settings: mapping trachoma prevalence in Ethiopia

Amoah

Fronterrè

Johnson

et al. 2021

International Journal of Epidemiology

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Background As the prevalences of neglected tropical diseases reduce to low levels in some countries, policymakers require precise disease estimates to decide whether the set public health targets have been met. At low prevalence levels, traditional statistical methods produce imprecise estimates. More modern geospatial statistical methods can deliver the required level of precision for accurate decision-making. Methods Using spatially referenced data from 3567 cluster locations in Ethiopia in the years 2017, 2018 and 2019, we developed a geostatistical model to estimate the prevalence of trachomatous trichiasis and to calculate the probability that the trachomatous trichiasis component of the elimination of trachoma as a public health problem has already been achieved for each of 482 evaluation units. We also compared the precision of traditional and geostatistical approaches by the ratios of the lengths of their 95% predictive intervals. Results The elimination threshold of trachomatous trichiasis (prevalence ≤ 0.2% in individuals aged ≥15 years) is met with a probability of 0.9 or more in 8 out of the 482 evaluation units assessed, and with a probability of ≤0.1 in 469 evaluation units. For the remaining five evaluation units, the probability of elimination is between 0.45 and 0.65. Prevalence estimates were, on average, 10 times more precise than estimates obtained using the traditional approach. Conclusions By accounting for and exploiting spatial correlation in the prevalence data, we achieved remarkably improved precision of prevalence estimates compared with the traditional approach. The geostatistical approach also delivers predictions for unsampled evaluation units that are geographically close to sampled evaluation units.

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Section: Introductionmentioning

confidence: 99%

Model-based geostatistics enables more precise estimates of neglected tropical-disease prevalence in elimination settings: mapping trachoma prevalence in Ethiopia

Amoah

Fronterrè

Johnson

et al. 2021

International Journal of Epidemiology

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“…Trichiasis is an annoying, irritating condition that commonly develops as a result of the conjunctival cicatrizing disorder, posing a risk to the vision and integrity of the globe. [ 10 ]…”

Section: Discussionmentioning

confidence: 99%

Anterior lamellar recession versus bilamellar tarsal rotation in upper lid cicatricial trichiasis

Ezzeldin,

Elgazzar,

Hussein

et al. 2023

Taiwan Journal of Ophthalmology

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PURPOSE: In recent years, there has been a significant shift from this destructive procedure to a reconstructive procedure such as anterior lamellar recession (ALR) and bilamellar tarsal rotation (BLTR). The aim is to report the outcomes and success rates of ALR compared to BLTR in patients with upper lid cicatricial trichiasis. MATERIALS AND METHODS: Our study is a prospective, interventional, comparative study that was conducted at the Ophthalmology Department of Al-Azhar University Hospital, New Damietta, Egypt. Our study was conducted on 62 eyes of 45 consecutive patients suffering from upper lid cicatricial trichiasis that required surgical intervention (17 patients were bilateral and 28 were unilateral). Thirty-three of them were treated by ALR (group 1), and 29 of them by BLTR (group 2). All statistical analysis was performed using the SPSS version 26. RESULTS: As regards the immediate postoperative correction, we found that adequate correction was significantly higher in the ALR group at all follow-up periods ( P < 0.05). However, the overcorrection and undercorrection were significantly higher in the BLTR group ( P < 0.05). Compared to the ALR group, the BLTR group saw a greater undercorrection at 1, 3, and 6 months (9.3%% vs. 0%; P = 0.048, 18.6% vs. 1.8%%; P = 0.009, 18.6%% vs. 1.8%; P = 0.009, 18.6%% vs. 1.8%; P = 0.009, respectively). CONCLUSION: ALR is better than BLTR in the treatment of upper lid cicatricial trichiasis.

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“…On the other hand, in Ethiopia studies showed that lower prevalence of postoperative trichiasis than other countries. For example, a study done in Amhara region, Ethiopia reported that postoperative trichiasis rate was 24.7% whereas another study in Ambasel district, South Wollo zone, Amhara region it was 23.8% in 2020 [ 23 , 24 ]. The possible explanation might be poor quality of service or it might be suggested by reinfection of patients because of lack knowledge and poor practice towards trachoma transmission and prevention measures.…”

Section: Discussionmentioning

confidence: 99%

Exploring barriers for trachomatous trichiasis surgery implementation in gamo zone, Southern Ethiopia

2021

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Background Trachomatous trichiasis is the leading infectious cause of blindness worldwide. The World Health Organization recommends eyelid surgery to reduce the risk of visual impairment from trichiasis. Unfortunately, the number of cases operated has grown less than expected. An understanding of barriers is fundamental for instituting measures to increase surgical uptake. Therefore, the aim of this study was to explore barriers of TT surgery implementation. Methods A qualitative study design was employed in December 2019. Purposive sampling technique was used to select three districts from Gamo zone, Southern Ethiopia. We conducted 9 FGDs and 12 in-depth interviews. Data was collected by audio tape recorder in Amharic and Gamogna languages and then transcribed to English language. The recorded interviews and focus group discussions were transcribed to verbatim (written text) and thematic analysis was done manually and reported accordingly. Findings we explored a number of barriers that hindered implementation of trichiasis surgery. The recurrence of trichiasis after surgery was the main challenges faced by operated individuals. The other barriers reported are negative perception towards trichiasis surgery, lack of logistic and supplies, transportation access problem for remote communities, inadequate trained health professional, less commitment from higher officials, lack of interest of integrated eye care workers due to incentive issues, believes of patients waiting supernatural power for healing service and carelessness of patients to undertake operation. Conclusion and recommendation Post-surgical trichiasis, lack of commitment from government officials and negative perception of patients towards the disease were considered as the reported barriers for implementation of trachomatous trichiasis. Closely supervising the integrated eye care workers would be the first task for district health offices to increase the uptake and improve the quality of service. Logistics and supplies should be made available and adequate to address all affected people in the community.

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Systematic review of the incidence of post-operative trichiasis in Africa

Cited by 11 publications

References 37 publications

Model-based geostatistics enables more precise estimates of neglected tropical-disease prevalence in elimination settings: mapping trachoma prevalence in Ethiopia

Model-based geostatistics enables more precise estimates of neglected tropical-disease prevalence in elimination settings: mapping trachoma prevalence in Ethiopia

Anterior lamellar recession versus bilamellar tarsal rotation in upper lid cicatricial trichiasis

Exploring barriers for trachomatous trichiasis surgery implementation in gamo zone, Southern Ethiopia

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