慢性重型乙型肝炎患者隐孢子虫感染的研究

目的探讨慢性重型肝炎与隐孢子虫感染的关系，为防治该病提供依据。方法用金胺-酚染色法(AA—P)和改良抗酸染色法(MAF)检测218例慢性重型乙型肝炎(慢重肝)患者和140例腹泻儿童粪便标本隐孢子虫卵囊，用PCR技术检测其DNA，并进行内切酶分析；对隐孢子虫感染影响因素进行分析。结果经AA-p、MAF和PCR检测，慢重肝患者隐孢子虫感染率分别为4．1％、3．2％和6．0％；腹泻儿童感染率为0．7％、0．7％和1．4％、PCR结果显示，慢重肝患者隐孢子虫感染率高于腹泻儿童；阳性患者腹泻史、动物接触史明显高于阴性患者，农村患者感染率高于城市患者结论慢性重型肝炎患者对隐孢子虫的易感性增加，隐孢子虫感染是引起慢性重型肝炎患者腹泻和可能加重其病情的因素之一。

A Study on Cryptosporidium Infection in Patients with Chronic Severe Hepatitis B

Objective To explore the relationship between chronic severe hepatitis and cryptosporidium infection to provide evidences for scientific prevention and treatment of chronic severe hepatitis. Methods Fecal samples of 218 patients with chronic severe hepatitis B (CSHB) and 140 children with diarrhea were collected, and were examined for cryptosporidium oocytes by using auramine-phenol staining method (AA-p) and modified acid-fast staining method (MAF), and for cryptosporidium DNA by PCR and restriction digestion analysis. The factors affecting cryptosporidium infection of patients with CSHB were preliminarily analyzed. Results The positive rates of cryptosporidium infection detected by AA-p, MAF and PCR in the patients with CSHB and children with diarrhea were 4.1%, 3.2%, 6.0% and 0.7%, 0.7%, 1.4%, respectively. The positive rate of cryptosporidium infection detected by PCR in patients with CSHB was higher than that in children with diarrhea (P<0.05). The number of patients who had history of diarrhea and contacting animals in PCR positive individuals, was significantly more than that in PCR negative ones(P<0.05), and the cryptosporidium infection rate in rural patients was significantly higher than that in ones living in the cities (P<0.05). Conclusion The present study suggests that patients with chronic severe hepatitis are susceptible to cryptosporidium infection, and cryptosporidium infection might be one of the important factors that result in diarrhea and worsen the state of illness in patients with CSHB.