The Centers for Disease Control and Prevention advises avoiding drinking or coming into contact with contaminated water in areas where schistosomiasis is common.A 2014 review found tentative evidence that increasing access to clean water and sanitation reduces schistosome infection.Other important preventive measures include hygiene education leading to behavioral change and sanitary engineering to ensure safe water supply. Preventive chemotherapy
For schistosomiasis control, World Health Organization recommends preventive chemotherapy, which is treatment of entire affected population and periodic treatment of all groups at high-risk at acquiring schistosomiasis with use of Praziquantel. In 2019, 44.5% of people with schistosomiasis was treated globally, and 67.2% of school-aged children needed preventive chemotherapy received treatment. Snails, dams, and prawns
For many years from the 1950s onwards, vast dams and irrigation schemes were constructed, causing a massive rise in water-borne infections from schistosomiasis. The detailed specifications laid out in various United Nations documents since the 1950s could have minimized this problem. Irrigation schemes can be designed to make it hard for the snails to colonize the water and to reduce the contact with the local population. Even though guidelines on how to design these schemes to minimise the spread of the disease had been published years before, the designers were unaware of them. The dams appear to have reduced the population of the large migratory prawn Macrobrachium, which eats the snails. After the construction of fourteen large dams, greater increases in schistosomiasis occurred in the historical habitats of native prawns than in other areas.
Saizen is a commercial preparation of synthetic somatropin (growth hormone, a.k.a. GH). Manufactured by Merck Serono, Saizen is produced by recombinant DNA technology from a mammalian cell line (mouse C127) that was modified by the addition of the human GH gene, resulting in an identical 191-amino acid sequence and structure. Usage
Saizen is injected. It is intended for long-term treatment of individuals who are growth hormone deficient. Saizen, like all synthetic somatropin, has special importance for children and adolescents whose growth failure is due to inadequate production of growth hormone. Studies have shown that somatropin usage fails to produce athletic performance enhancement despite claims to the contrary. More recently, Saizen has been used in IVF protocols by a few physicians for female patients undergoing infertility treatment in an attempt to increase the number and quality of oocytes retrieved. It affects: 

Tissue growth
Skeletal growth
Cell growth (especially muscle growth)
Organ growthMetabolism
Protein metabolism
Carbohydrate metabolism
Lipid metabolism
Mineral metabolism
Connective tissue and bone metabolismSaizen usage should be performed under the regular guidance of a physician who is experienced in the diagnosis and management of growth hormone deficiency. Individuals with inadequate secretion of growth hormone sometimes experience fasting hypoglycemia that is improved by treatment with growth hormone. Using Saizen may decrease glucose tolerance. Because human growth hormone may induce a state of insulin resistance, patients should be observed for evidence of glucose intolerance. As with all human growth hormone supplementation, Saizen should be used with caution in patients with diabetes mellitus or a family history of diabetes mellitus. See also
Growth hormone treatment

External links
"Somatropin".