Human diphyllobothriasis is a widespread fish-borne zoonosis caused by the infection with broad tapeworms belonging to the genus Diphyllobothrium. In mainland China, so far 20 human cases of Diphyllobothrium infections have been reported, and the etiologic species were identified as D. latum and D. nihonkaiense based on morphological characteristics or molecular analysis. In the present study, proglottids of diphyllobothriid tapeworms from 3 human cases that occurred in Heilongjiang Province, China were identified as D. nihonkaiense by sequencing mitochondrial cytochrome c oxidase subunit I (cox1) and NADH dehydrogenase subunit 5 (nad5) genes. Two different cox1 gene sequences were obtained. One sequence showed 100% homology with those from humans in Japan. The remaining cox1 gene sequence and 2 different nad5 gene sequences obtained were not described previously, and might reflect endemic genetic characterizations. D. nihonkaiense might also be a major causative species of human diphyllobothriasis in China. Meanwhile, the finding of the first pediatric case of D. nihonkaiense infection in China suggests that infants infected with D. nihonkaiense should not be ignored.
Experience and science, being the two sources of technology, have different focuses. In experiential technology, techniques and skills are emphasized while in scientific technology tool or equipment. Experiential technology is generally regarded as local knowledge, and scientific technology universal. Traditional Chinese medicine is an experiential technology. In contrast, Western medicine is set up as a scientific technology with great efforts. Through the comparison of these two medicines, this paper attempts to illustrate the difference between the two technologies and in turn, the difference between these two medicines by defining these two technologies. Finally, this paper further investigates the special values of Chinese medicine. Making use of the SSK theory, this paper deconstructs the idea of universality of science, and argues that, the universality is the feature that science pursues, but not what it already has. With more historical evidence, experiential technology is more stable, while scientific technology is less stable because it updates quickly, and often changes reversely.
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