ObjectiveTo investigate the cadmium contamination levels in commercially available foods in Jinhua City, to assess the dietary cadmium exposure risk among Jinhua residents, and to provide a scientific basis for optimizing dietary recommendations and managing cadmium exposure risks. MethodsFrom 2013 to 2024, a total of 4 434 samples of 15 categories of commercially available foods from the Jinhua Food Safety Risk Monitoring System, including rice, milled and processed grains, fresh vegetables 1 (leafy vegetables, celery, and daylily flowers), fresh vegetables 2 (legume vegetables, root and tuber vegetables, and stem vegetables other than celery) , fresh vegetables 3 (all vegetables other than fresh vegetables 1 and fresh vegetables 2), fresh fruits, legumes and legume products, nuts and seeds, meat and meat products (excluding livestock and poultry offal and products made from them), eggs and egg products, milk and dairy products, fish, crustaceans (excluding sea crabs and mantis shrimp), sea crabs and mantis shrimp, and other aquatic products (bivalves, gastropods, cephalopods, and echinoderms), were collected from 9 counties (cities and districts) in Jinhua City to assess their cadmium contamination levels. Combining these results with data from the 2023 Jinhua City Resident Nutrition Surveillance Survey, the health risks associated with dietary cadmium exposure among residents of different ages and genders in Jinhua City were assessed according to the provisional tolerable monthly intake (PTMI, 25 μg·kg^-1) and margins of safety (MOS) recommended by the Joint FAO/WHO Expert Committee on Food Additives (JECFA). A MOS > 1 indicated that the risk of dietary cadmium exposure for residents was at an acceptable level，whereas a MOS ≤ 1 indicated that the risk of dietary cadmium exposure for residents was relatively high. ResultsThe cadmium detection rate in food was 73.55% (3 261/4 434), with 4.06% (180/4 434) of samples exceeding the limit. Foods with higher cadmium detection rates were in sea crabs and mantis shrimp (98.59%), fresh vegetables 1 (94.92%), and rice (87.93%). The median cadmium concentration was 0.010 mg·kg^-1. Food categories with higher cadmium concentrations included sea crabs and mantis shrimp (0.644 mg·kg^-1), rice (0.032 mg·kg^-1), and fresh vegetables 1 (0.020 mg·kg^-1). A total of 2 092 individuals were included in the population nutrition surveillance survey, and the average daily per capita food consumption was 887.97 g·d^-1, consisting of fresh vegetables (342.17 g·d^-1), meat and meat products (141.29 g·d^-1), and rice (110.70 g·d^-1). The 50th and 95th percentiles of cadmium mass fractions were used to define general and high exposure levels for assessing resident exposure risk. When assigning a value of 0 and the limit of detection (LOD) value to the contamination levels of undetected samples, at the general exposure level, the monthly average cadmium exposure for the residents was 5.08 and 5.15 μg·kg^-1 (based on body weight; same below), with MOS values of 4.92 and 4.85; the range of average cadmium exposure across different age and gender groups was 3.91‒6.70 and 3.97‒6.80 μg·kg^-1, with all MOS values >1, indicating that the dietary cadmium exposure risk for the residents was at an acceptable level. At the high exposure level, the average cadmium exposure for the residents was 36.02 μg·kg⁻¹, with an MOS value of 0.69; the average cadmium exposure levels for different age and gender groups ranged from 27.68 to 48.37 μg·kg⁻¹, with MOS values ranging from 0.52 to 0.90, all of which were <1; indicating that the dietary cadmium exposure risk for residents was relatively high. Dietary cadmium exposure among minors aged 6‒17 years in Jinhua City was higher than that among adults, and dietary cadmium exposure among females was higher than that among males. Rice and fresh vegetables were the major foods contributing to dietary cadmium exposure among residents in Jinhua City, each accounting for more than 30% of the total exposure contribution. ConclusionCommercially available foods in Jinhua City exhibit varying degrees of cadmium contamination, with higher levels primarily found in aquatic products such as sea crabs and mantis shrimp, fresh vegetables such as leafy greens, celery, and daylily flowers, as well as rice. The dietary cadmium exposure risk for residents of Jinhua City is at an acceptable level under general exposure conditions but poses a health risk under high exposure conditions. Monitoring of cadmium in relevant foods should be strengthened, and dietary guidance should be provided to high-risk groups including minors aged 6‒17 years and women.

Objective: To evaluate the dietary quality among residents aged 18-79 years in Jinhua City, Zhejiang Province using Dietary Balance Index (DBI_22), so as to provide evidence for improving residents' nutritional status and formulating targeted nutritional intervention measures. Methods: From July to October in 2023-2024, a multi-stage random sampling method was employed to select residents aged 18-79 years in Jinhua City as survey subjects. Demographic information was collected through questionnaire survey. Dietary intake was investigated using 3 d 24 h dietary recall method. The DBI_22 higher bound score (DBI_HBS), lower bound score (DBI_LBS), and Dietary Quality Distance (DBI_DQD) were calculated to evaluate dietary quality. Dietary patterns were determined based on DBI_HBS and DBI_LBS scores. Results: A total of 3 284 residents were surveyed, with an average age of (52.81±14.93) years. There were 1 590 males (48.42%) and 1 694 females (51.58%). There were 857 urban residents (26.10%) and 2 427 rural residents (73.90%). The DBI_HBS was (13.85±4.91) points, with low excessive intake accounting for 61.18%; the DBI_LBS was (20.05±5.62) points, with low insufficient intake accounting for 74.54%; the DBI_DQD was (33.90±7.75) points, with low and moderate dietary imbalance accounting for 49.73% and 46.99%, respectively. Males, residents aged 60-79 years, and rural residents had higher DBI_DQD scores, indicating dietary imbalance. Insufficient intake was reported by 84.81% of residents for fruits, 96.56% for milk, and 55.09% for legumes. Excessive consumption was observed in 80.36% for poultry/meat and 39.74% for salt. Among the six identified dietary patterns, pattern A was optimal and adopted by 518 residents (15.77%), while patterns D and E had the highest participation rates, with 1 045 (31.82%) and 1 037 (31.58%) residents, respectively. Conclusions The dietary intake among residents in Jinhua City is characterized by both insufficient intake and excessive intake. Males, residents aged 60-79 years, and rural residents are key populations with dietary imbalance. The main dietary patterns are characterized by insufficient intake of fruits, milk, and legumes, and excessive intake of poultry/meat and salt.

Objective: To analyze the epidemiological characteristics of Salmonella infection among foodborne disease cases in Jinhua City, Zhejiang Province from 2019 to 2024, so as to provide the evidence for strengthening the prevention and control of foodborne diseases. Methods: Data on foodborne disease cases in Jinhua City from 2019 to 2024 were collected via the Zhejiang Provincial Foodborne Disease Surveillance and Reporting System. Stool or anal swab specimens were collected for Salmonella detection and serotype identification. Descriptive statistical analysis was performed to analyze the population, temporal and regional distribution, clinical manifestations and suspected food exposure of Salmonella infected cases. The concentration ratio method was used to explore the monthly distribution characteristics and concentration degree of Salmonella infection, and the circular distribution method was adopted to estimate the peak date and epidemic period of Salmonella infection. Results: A total of 24 044 foodborne disease cases were reported in Jinhua City from 2019 to 2024, among which 1 376 Salmonella strains were isolated with a positive detection rate of 5.72%. A total of 96 Salmonella serotypes were identified, dominated by Salmonella Typhimurium (573 strains, accounting for 41.64%). The detection rates were relatively higher in children aged 0-<6 years and scattered children, reaching 16.56% and 17.48%, respectively. The high incidence period was from May to October with detection rates ranging from 5.55% to 8.75%. The concentration ratio M was 0.48, indicating obvious seasonal distribution of Salmonella infection. The peak date of infection was July 24th, and the peak period of infection was from May 15th to October 2nd. Yongkang City and Dongyang City had higher positive rates of 11.41% and 10.87% separately. Among cases infected with Salmonella, the main clinical symptoms were diarrhea and abdominal pain, involving 1 369 cases (99.49%) and 785 cases (57.05%). Infant food, store-sold food and bulk food had higher Salmonella positive rates at 15.38%, 8.14% and 6.35% respectively. Conclusions Salmonella Typhimurium was the predominant serotype of Salmonella infection among foodborne disease cases in Jinhua City from 2019 to 2024. The infection peaks in summer and autumn. Children were the key population for prevention and control, and Yongkang City and Dongyang City were key priority areas. Priority supervision should be strengthened on infant food, store-sold food and bulk food.