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Background Conflicting data exist regarding the relationship between dual infection of hepatitis B virus (HBV) and hepatitis C virus (HCV) with type 2 diabetes mellitus (T2DM). We assessed dual infection of HBV and HCV with the levels of blood glucose and development of DM. Methods A total of 9621 participants in a community-based study were enrolled from 18 towns in Maoli county of Taiwan. Blood samples were collected and tested for hepatitis B surface antigen (HBsAg) and antibodies (HBsAb), antibodies against hepatitis C virus (anti-HCV) and fasting plasma glucose. DM was defined as fasting plasma glucose≥126 mg per 100 ml. Results Only 0.7% of total participants had HBV/HCV coinfection. The prevalence of HBV and HCV monoinfection were 9.9 and 5.7%, respectively. Adjusted blood glucose levels and development risk of T2DM (odds ratio [OR], 2.55; p Conclusions Our study shows HBV/HCV coinfection was significantly correlated with blood glucose levels. A significant proportion (28%) of participants with HBV/HCV coinfection developed T2DM. Although the precise mechanisms of dual positive infection of HBV and HCV are unclear, there is increasing evidence that dual infection of HCV and HBV is strongly associated with the development of T2DM.

Background/Purpose It has been shown that herbs that contain aristolochic acid induce urological cancer. Chinese herbalists have easy access to such herbs. Our previous mortality study has shown a significantly increased risk of urological cancer in female but not male herbalists. To re-examine this risk in male herbalists, the incidence of urological cancer was analyzed. Methods We enrolled all 6550 Chinese herbalists in Taiwan registered during 1985-2000, and we retrospectively followed the development of cancer until 2001 by analysis of data collected from the Taiwan Cancer Registry. Standardized incidence ratios (SIRs) were calculated for urological cancers in herbalists and compared with those for the general population in Taiwan. Results There were 30 newly diagnosed cases of urological cancer and most of them were transitional cell carcinoma (93.1%). The mean age at diagnosis for urothelial carcinoma was 51.6 years, and 51.9% were in the upper urinary tract. After adjustment for age and sex, the SIR for all urological cancers was 3.51 [(95% confidence interval (CI): 2.37-5.01]. When stratified by location, the SIRs for kidney and upper urinary tract cancers and bladder cancer were 4.24 (95% CI: 2.47-6.80) and 2.86 (95% CI: 1.52-4.89), respectively. When analyzed by sex, the SIRs for all urological cancers, kidney and upper urinary tract cancers, and bladder cancer were also significantly increased in male herbalists. Conclusion The significant risk of urothelial carcinoma noted in male herbalists increases our suspicion that this is an occupational disease that renders regular health assessment of herbalists an urgent necessity.

Objective Many Chinese herbs contain aristolochic acids (ALAs) which are nephrotoxic and carcinogenic. The objective of this study was to identify whether exposure to herbs containing ALAs increased the risk of kidney disease among Chinese herbalists. Methods A nested case–control study was carried out on 6538 Chinese herbalists registered between 1985 and 1998. All incident cases of chronic renal failure reported to the Database of Catastrophic Illness of the National Health Insurance Bureau between 1995 and 2000 were defined as the case group. Up to four controls without renal failure were randomly matched to each case by sex and year of birth. A structured questionnaire survey was administered between November and December 2002. The Mantel–Haenszel method and conditional logistic regression were used to estimate the risks. Results 40 cases and 98 matched controls were included in the final analysis. After adjusting for age, frequent analgesic use, and habitual consumption of alcohol, fermented or smoked food, we found manufacturing and selling Chinese herbal medicine (OR 3.43, 95% CI 1.16 to 10.19), processing, selling or dispensing herbal medicines containing Fangji (OR 4.17, 95% CI 1.36 to 12.81), living in the workplace (OR 3.14, 95% CI 1.11 to 8.84) and a history of taking of herbal medicines containing Fangji (frequently or occasionally) (OR 5.42, 95% CI 1.18 to 24.96) were significantly associated with renal failure. Conclusion Occupational exposure to and consumption of herbs containing ALAs increases the risk of renal failure in Chinese herbalists.

Background: A national survey in Taiwan has shown that Chinese herbal therapy increases the risk of chronic kidney disease. However, it is unknown whether herbal therapy will increase the risk of urological cancers. The purpose of this study was to determine whether Chinese herbalists are at higher risk for urological cancers. Methods: We studied all Chinese herbalists in Taiwan that were registered in the Chinese Herbalist Labor Union between 1985 and 2000. We retrospectively followed their survival status and causes of death using the National Mortality Registry Database from 1985 to 2004. Standardized mortality ratios (SMRs) for urological cancers in herbalists were calculated and compared with those of the general population of Taiwan. Results: A total of 6548 Chinese herbalists were enrolled and 88,289 person-years were accrued during the observation period. After adjustment for age and sex, the SMR for urological cancers was significantly higher for Chinese herbalists than for the general population (SMR = 3.10; 95% CI: 1.41–5.87). When further stratified by location, the SMR for kidney cancer and other urinary organ cancers (SMR = 3.81; 95% CI: 1.39–8.28) except bladder cancer (SMR = 2.26; 95% CI: 0.47–6.59) were significantly higher for the Chinese herbalists. The SMR for chronic and unspecified nephritis, renal failure, and renal sclerosis were also significantly higher for herbalists (SMR = 2.40; 95% CI: 1.40–3.84). Conclusions: Chinese herbalists have a significantly higher risk for urological cancers. This increased risk among herbalists highlights the urgent need for safety assessments of Chinese herbs.

The objective of this study was to investigate the risk factors for and prevalence of clonorchiasis in Miaoli County, Taiwan. In 2009, 6,929 subjects were randomly selected in Miaoli County and given a questionnaire to fill out regarding risk factors for clonorchiasis; the response rate was 69%. Stool sample was obtained from each participant who filled out the questionnaire and examined using the merthiolate-iodine-formaldehyde concentration (MIFC) technique to determine the presence and concentration of Clonorchis sinensis eggs. Fifty-one subjects gave a history of clonorchiasis (prevalence rate 0.7%). Seven stool samples were positive for C. sinensis (prevalence rate 0.1%). Shihtan Township (5.0%) in Miaoli County had the highest prevalence of clonorchiasis. Using logistic regression, we found people who often fished (OR: 3.65, p=0.013) or who had a family member with a history of clonorchiasis (OR: 18.7, p0.001) were more likely to have it. We also found tourists who traveled to China and ate fish there (OR: 2.46, p=0.105) or who owned a fish pond (OR: 1.93, p=0.128) were more likely to get clonorchiasis. The prevalence of clonorchiasis in Miaoli County was relatively low, which can be explained by good sanitation and personal hygiene. The Public Health Department of Taiwan should warn Taiwanese travelers about high risk areas for contracting clonorchis infection and encourage these travelers to avoid going fishing or eating raw fish in high risk areas.

Aristolochic acid can cause urothelial carcinoma. Herbal remedies containing aristolochic acids were previously categorized as proven group 1 human carcinogens by the WHO cancer agency, the International Agency for Research on Cancer. However, the health effect on workers exposed to aristolochic acid is unclear. Fangchi, a representative herb containing aristolochic acid, is commonly used in the Chinese herbal medicine industry. We determined whether workers exposed to fangchi are at increased risk for urothelial carcinoma.We designed a case-control study based in a national representative cohort of Chinese herbalists. This study analyzed 6,564 Chinese herbalists employed between 1985 and 1998. All incident cases of urothelial carcinoma that occurred between 1988 and 2001 were defined as the case group. Controls were selected from the baseline cohort in a randomized manner. A total of 24 cases and 140 controls were included in analysis. Information about fangchi exposure was obtained in a questionnaire survey administered in 2002.Processing, selling or dispensing herbs containing fangchi significantly increased the risk of urothelial carcinoma (HR 2.4, 95% CI 1.1-5.3, p = 0.03). This relationship was independent of cigarette smoking or potential arsenic exposure from drinking water from deep wells.Exposure to the Chinese herbal drug fangchi increases the risk of urothelial carcinoma in herbalists. Appropriate medical monitoring is warranted for workers who have similar exposure.