Although Ascaris lumbricoides is a common intestinal parasite of humans with worldwide distribution causing ascariasis, Ascaris is a neglected disease and still is a burden in developing countries. Furthermore, the parasite’s permanence and prevalence present difficulties in control strategies. Therefore, more research on the mechanisms of resistance to infection is required for reducing prevalence parasite and control of infections.

Coronavirus (CoV) (2019‐nCoV) is a large, enveloped, positive-sense, single-stranded RNA virus. The abnormal outbreak of 2019‐nCoV in Wuhan warns of the risk of CoV (2019‐nCoV) to public health which causes viral pneumonia outbreak. In our review, we will discuss the biology of CoVs and the potential risk of the novel CoV (2019‐nCoV) and guide us to strategic objectives for controlling the virus.

Lymphatic filariasis (LF) is a tropical disease caused by infection with the parasitic filarial worms: Wuchereria bancrofti, Brugia malayi, and Brugia timori. The symptoms of this chronic disease appear in adults (in men more than in women) and include damage to the lymphatic system, arms, legs, and genitals, which cause significant pain, reducing productivity, and social problems. LF is a cause of continued disability, pain, disfigurement, and sexual disability in the world, so the knowledge of the disease and the infection control is very important. In addition to the importance of prevention, that includes giving medicine and using controlling ways of mosquitoes. Moreover, the prevention of disease is important, that includes giving medicine and using controlling ways of mosquitoes. However, although the efforts of health organizations to reduce the LF infections, there are still many challenges including the early diagnosis and control of infection among people.

Objective: In view of the serious prevalence of helminth and ease of infection, our research focuses on the detection of the prevalence of helminth eggs in the Sourani Dam Lake (Tartus governorate) water reflecting the health services and environmental circumstances in this region. Methods: The study was carried out on water samples of AL-Sourani Dam Lake with the aim to investigate the quality of water from October 2015 to September 2016 and verify the existence of helminth eggs according to their characteristics. Results: Our results showed a presence of helminth eggs such as Ascaris lumbricoides, Taenia saginata, and Hymenolepis nana in water samples. The total prevalence was 1.57 egg/L. T. saginata eggs were the most prevalent, followed by the eggs of A. lumbricoides, while the eggs of H. nana were the least prevalent, especially in summer and autumn. Conclusion: Due to the presence of helminth eggs in samples, it is recommended that sewage treatment plants be established and that health awareness be increased to decrease their prevalence.

Hydatids or cystic echinococcosis results from being infected with Echinococcus granulosus that found in dogs as definitive hosts and humans, sheep, goats, and pigs as intermediate hosts, mainly prevailing in regions with animal husbandry. Echinococcosis is a public health concern, especially in developing regions; this is due to the medical and economic harm to humans and the inefficiency of treatment and the difficulties of diagnosis in the early stages of infection. Our review summarizes the historical backgrounds of Echinococcus, together with the biological and epidemiological aspects of parasite, in addition to diagnosis and treatment ways.