Fig. 3

VOSviewer occurrence term map of the Arab world hot topics of leishmaniasis research over the period of 1998–2017 which extracted from titles and abstracts of publications in the Scopus. The size and color a term indicate the frequency and the cluster with which the terms have been appeared respectively. In general, the closer two terms in the map indicating the stronger their relation. Out of 17,479 terms, 531 terms meet the threshold by using minimum number of occurrence threshold of 10. By default, VOSviewer reducing the terms to the most relevant 60% results in 319 terms which encompass 4 main clusters in four colors: red, green, yellow, and blue