Fig 1.
Flowchart of selected studies.
Fig 2.
History of the number of articles and reports published for each PC-NTD (before 1960 then during each 5-year period).
Fig 3.
History of national control programs for PC-NTDs.
Table 1.
Summary of the included epidemiological studies and reports for onchocerciasis (N = 27).
Fig 4.
Distribution of the prevalence of onchocercal nodules in the Republic of the Congo.
The left panel shows the surveys conducted from 1960 to before REMO (2001); the right panel shows the APOC’s REMO surveys. The map was created with MapInfo 8.5 (Geographic Information System, http://www.precisely.com). The base layer used of the map was created by the « Laboratoire Population Environnement Développement » (LPD, UMR 151 AMU-IRD) (https://www.lped.fr/-observatoires-societe-environnement-.html) under the supervision of the Ministry of Health and Welfare of the Republic of Congo.
Fig 5.
Onchocercal nodule prevalence during the course of CDTI (2011–2015) in the Republic of the Congo.
The map was created with MapInfo 8.5 (Geographic Information System, http://www.precisely.com). The base layer used of the map was created by the « Laboratoire Population Environnement Développement » (LPD, UMR 151 AMU-IRD) (https://www.lped.fr/-observatoires-societe-environnement-.html) under the supervision of the Ministry of Health and Welfare of the Republic of Congo.
Fig 6.
Prevalence of skin O. volvulus microfilariae recorded during surveys in the Republic of the Congo.
The left panel shows the results recorded between 1960 (first survey) and 2000 and the right those of the surveys conducted after 2000. The map was created with MapInfo 8.5 (Geographic Information System, http://www.precisely.com). The base layer used of the map was created by the « Laboratoire Population Environnement Développement » (LPD, UMR 151 AMU-IRD) (https://www.lped.fr/-observatoires-societe-environnement-.html) under the supervision of the Ministry of Health and Welfare of the Republic of Congo.
Table 2.
Summary of the included epidemiological studies and reports on LF.
Fig 7.
Distribution of soil-transmitted helminths infections in the Republic of the Congo.
Data were obtained from the 2011 national survey performed by the PNLO, which used the Kato-Katz method for diagnosis. Reported prevalence values are for at least one STH. The map was created with MapInfo 8.5 (Geographic Information System, http://www.precisely.com). The base layer used of the map was created by the « Laboratoire Population Environnement Développement » (LPD, UMR 151 AMU-IRD) (https://www.lped.fr/-observatoires-societe-environnement-.html) under the supervision of the Ministry of Health and Welfare of the Republic of Congo.
Table 3.
Summary of the included epidemiological studies and reports for STH.
Fig 8.
Distribution of schistosomiasis cases reported over the years.
The number of urogenital and intestinal schistosomiasis cases reported in a retrospective epidemiological study conducted between 1963 and 1976 [102].
Fig 9.
Distribution of schistosomiasis in the Republic of the Congo.
The left panel reports results from all epidemiological surveys conducted between inception to 1987 (last known published study); the right panel reports the most recent results, from a 2011 survey conducted by the PNLO. The map was created with MapInfo 8.5 (Geographic Information System, http://www.precisely.com). The base layer used of the map was created by the « Laboratoire Population Environnement Développement » (LPD, UMR 151 AMU-IRD) (https://www.lped.fr/-observatoires-societe-environnement-.html) under the supervision of the Ministry of Health and Welfare of the Republic of Congo.
Table 4.
Summary of the epidemiological studies and reports on schistosomiasis included in this review.
Table 5.
Summary of the epidemiological studies and reports for trachoma.