Through their childhood nutrition project , club members worked to lower the rate of infection by intestinal parasites among children , provide information on hygiene to parents and children , and carry out a six - month food and nutrition program 透过他们的童年营养计画，团员们工作于降低孩童中肠寄生虫的感染率，提供父母和孩童有关卫生常识，并且完成一个六个月的食品和营养计画。
3 chemical action : the stimulating action of metabolites products of metabolism , excretions and secretions from parasites , and chemical substances generated from dismembered dead parasites can cause many types of damage to the human body 3化学作用：寄生虫的代谢产物分泌物排泄物和虫体死亡后的分解物等化学物质的刺激作用，对人体可造成各种不同的危害：如溶组织阿米巴，分泌溶组织
Besides these sources , livestock excrement is also a source for many types of parasites . humans can be infected through the skin , through food or water by mosquitoes and flies , through human and animal waste , through contaminated water , and other means 而且人们所豢养的猪羊等动物的粪便，也是多种寄生虫的污染源，通过蚊蝇传播人畜粪便污染水源等，以及通过皮肤食物饮水等途径，均可使人受到感染。
When the defensive power of the host is temporarily equal to the invasive power of the parasites , a small number of parasites can live or reproduce in the body . though they may not cause harm or clinical symptoms to the organism , the host will become a carrier of pathogens disease - causing agents 若宿主的防御力量与寄生虫的侵袭力，处于暂时平衡时，侵入的少量寄生虫，可在人体内存活或繁殖，尚不致于对机体造成危害，不会出现临床症状，但可传播病原体而成为带虫者。
Malaria is one of the three most prevalent serious diseases in the world , the other are tuberculosis and aid , nearly 500 million people are infected worldwide each year , more than one million died , according to unicef ， un children organization , more than 90 % of all malaria cases are infected in africa , two thousand african children died daily from this disease , doctor patric kaucher is with the center for disease control and prevention , in rural africa , one out of 5 children born does not survive till his fifth birthday , malaria is transmitted from person to person , via mosquitoes carry the parasite . malaria rapidly destroy the red blood cells which deliver o and nutrients to the rest of the body , the disease is preventable and treatable , but most africa do not have adequate resource to do with either 疟疾是世界三大严重流行病之一，其他的2个是肺结核，艾滋病，每年大约有五亿人感染此病，超过100万人死亡，根据联合国儿童基金会联合国儿童组织，大约90 %的疟疾病是在非洲感染的，每2天就有2万的非洲儿童死于疟疾，医学博士是这个疾病控制和预防中心的，在非洲边远地方，出生的孩子每五个有一个活不到五岁，疟疾可以在人类之间通过载着寄生虫的蚊子传播，一旦传染了疟疾，人类的运载氧气和养料到身体各部位的血红细胞就被很快破坏，疟疾可以预防和救治，但是非洲没有足够的财力来救治疟疾。
