Toxocara eggs in public places worldwide - A systematic review and meta-analysis

Toxocariasis is a neglected tropical disease of humans. Although many studies have indicated or shown that environmental contamination with Toxocara species eggs is a major risk factor for toxocariasis in humans, there has been no comprehensive analysis of published data or information. Here, we conducted the first systematic review and meta-analysis of current literature to assess the global prevalence of Toxocara eggs in public places (including beaches, parks and playgrounds). We conducted searches of the PubMed, Embase, Scopus and Science Direct databases for relevant studies published until 20 April 2018, and assessed the prevalence rates of Toxocara eggs in public places. We used the random effects model to calculate pooled prevalence estimates, with 95% confidence intervals (CIs), and analysed data in relation to WHO geographical regions. Subgroup analysis and meta-regressions regarding the geographical and environmental variables were also performed. Of 2384 publications identified, 109 studies that tested 42,797 soil samples in 40 countries were included in the meta-analysis. The pooled global prevalence of Toxocara eggs in public places was 21% (95% CI, 16-27%; 13,895/42,797). The estimated prevalence rates in the different WHO regions ranged from 13% to 35%: Western Pacific (35%; 95% CI, 15-58%), Africa (27%; 95% CI, 11-47%), South America (25%; 95% CI, 13-33%), South-East Asia (21%; 95% CI, 3-49%), Middle East and North Africa (18%; 95% CI, 11-24%), Europe (18%; 95% CI, 14-22%), and North and Central Americas (13%; 95% CI, 8-23%). A high prevalence was significantly associated with high geographical longitude (P = 0.04), low latitude (P = 0.02) and high relative environmental humidity (P = 0.04). This meta-analysis of data from published records indicates that public places are often heavily contaminated with eggs of Toxocara. This finding calls for measures to reduce the potential risk of infection and disease in humans.

Are educating and promoting interventions effective in oral health?: A systematic review

OBJECTIVE

It is estimated that about 20%-25% of the world's population are suffering from periodontal diseases or severe gum diseases. This requires appropriate interventions. For the development of effective and evidence-based programmes tailored to the target group, the aim of this review was to survey to the effectiveness of oral health education and promotion interventions in the relevant groups of people.

METHODS

The electronic databases including PubMed, EMBASE, Web of science and Cochrane Library were searched for English language studies between 2010 and (January-December) 2016. To assess the quality of articles, the checklist was used that includes 19 items. Studies were selected based on PICOs criteria, and finally, 16 studies were entered in our study.

RESULTS

A total of 16 articles were selected, classified into two groups (A and B groups), so that group A with short-term effects includes improving knowledge, attitudes, self-efficacy, oral health behaviour (toothbrushing and flossing), theoretical constructs (perceived susceptibility, perceived severity and perceived behavioural control) which consists of 15 articles and group B with long-term effects includes improving decayed teeth, plaque, calculus and bleeding which consists of six articles.

CONCLUSION

Approximately, this study supports effectiveness of all oral health education and promotion interventions, especially in short-term outcomes. Regarding the importance of long-term and short-term outcomes for oral health education and promotion programmes, These interventions could be performed in the future with several target groups including family and teachers.