Parasitic intestinal diseases are widespread in the world with a higher prevalence in developing countries. They are generally a serious public health problem in tropical countries. In October 2020, a cross-sectional study was undertaken to determine the prevalence of intestinal parasites in patients visiting Fermathe Hospital in Haiti. Data were collected on stool results with the presence of parasites and we used systematic sampling for further information regarding patients with parasitology problems. A summary field survey was also carried out in the surrounding areas with more cases recorded such as Corail, Calbasse, Fort Jacques, Center / Marché Kenscoff, Doco, and Douret for direct observations of the inventory and voluntary interviews with the residents of the area on hygiene practices. The prevalence of intestinal parasites was 31.26% and the most common species were: Endolimax nana (39.13%), followed by Blastocystis hominis (14%), Blastocystis hominis / Giardia intestinales (12.07%), Entamoeba coli (5.31%), and others like Iodamoeba butschlii, Ascaris lumbricoides or combined parasites were less than 5%. The field survey revealed a strong relationship between parasitosis and drinking water, parasitosis, and place of defecation. Although there are health centers in the area, many people use self-medication or empiric therapy. The study highlights the important causes of gastrointestinal disorders that present themselves in this hospital and confirms intestinal parasitosis as a major public health problem in Haiti.

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Faced with the threats posed by climate change to global public health in the 21st century, the island of Haiti has a duty to inform the population and disseminate knowledge on the health consequences of the phenomenon. The effects of climate change are imminent for the country. In terms of health, the consequences will particularly accentuate the prevalence of endemic diseases, water-borne and infectious pathologies, malnutrition and undernourishment. Also, information on this issue must be widely disseminated through environmental and health education in order to raise awareness in the population and encourage them to modify their daily lifestyles through mitigation and adaptation. Previous work on strategies for popularizing scientific knowledge has shown that culture and poverty constitute obstacles to changes in behavior favoring mitigation and adaptation to climate change. The study of the Social Representations of the populations or social groups concerned makes it possible to discarded them.. From this point of view, this article questions and analyzes the social representations of vector pathologies including Malaria, Dengue, Chikungunya and Zika among the residents of Jalousie, one of the vulnerable neighborhoods of the Metropolitan Region of Port-au-Prince (MRPP - Haiti). This work highlights the link established by the population of Jalousie between climate change and the transmission of the vector-borne diseases mentioned. It does this by considering elements of Haitian popular knowledge likely to build understanding that combines the prevention and symptomatology of these pathologies with knowledge of public hygiene and supernatural phenomena. The survey carried out on a representative sample of 121 residents of the Jalousie district, a slum area of MRPP, shows that vector-borne diseases are assimilated with epidemics and their transmission due to changes in the seasons (temperature change: hot weather, rainy weather in Haiti).