The effect of chlorpyrifos oral exposure on the histomorphometric and kidney function in Wistar rat.

BACKGROUND: Chlorpyrifos belongs to a broad-spectrum organophosphate insecticide that has high toxicity, is metabolized in the liver by the oxidation reaction, and can inhibit acetylcholinesterase activity. Acetylcholinesterase inhibition generates the reactive oxygen species and induces oxidative stress, which ultimately results in cellular damage like in the kidney. Examining blood urea nitrogen (BUN) levels, creatinine, and kidney histopathology is an appropriate indicator to assess the toxicity of chlorpyrifos to the degree of damage to cells and kidney tissue. MATERIALS AND METHODS: This research used to determine the effect of duration of exposure to chlorpyrifos and dose-response relationships is important for early detection of the effects of chlorpyrifos toxicity on health. The research study was a true experimental (completely randomized design) consisting of 30 subjects divided into 5 groups. Controlled Group (K1) given 1 mg/kg BW Tween 20 and NaCl 0, 9% until the 56th day. The chlorpyrifos exposed group (P1, P2, P3, and P4) was given chlorpyrifos 5 mg/kg BW for 7, 14, 28, and 56 days. After the treatment, BUN and creatinine levels were measured, and microscopic changes in the kidney were analyzed. The results of BUN, creatinine, and kidney histopathologic were analyzed using the analysis of variance statistical test. RESULTS: The data result showed that compared to the control group, there were significant increases of BUN and creatinine (P = 0.013 and P = 0.003). Histopathological examinations of kidney glomerulus diameter were also smaller compared to the control group (P = 0.00). All the data measurement indicates significant differences compared to the control group. CONCLUSIONS: We concluded that sub-chronic oral exposure to chlorpyrifos at low doses can damage the kidneys and cause kidney failure.

Predicting medical graduates' clinical performance using national competency examination results in Indonesia.

BACKGROUND: Indonesia has applied a national competency exit-examination for medical graduates since 2014, called The Indonesia Medical Doctor National Competency Examination (IMDNCE). This examination is administered to ensure the competence of medical graduates from at present 83 medical schools in Indonesia. Although many studies reported their evaluation on medical licensing examinations, there are not many studies performed to evaluate the correlation of a national licensing examination to the graduates' clinical practice. AIMS: This research aimed to evaluate the performance of new medical doctors in Indonesia in their internship period after the IMDNCE completion, and whether it might become a predictive indicator for the new medical doctors' clinical performance. METHODS: An observational cross-sectional study was performed in November-December 2017 on 209 doctors who were new medical graduates. Thirty-one senior doctors from a range of regions in Indonesia who were recruited and trained previously participated in the observation. The Clinical Performance Instrument (CPI) tool was developed as an evaluation tool of the new doctors' clinical competence to be observed for three weeks. The obtained data were analysed using descriptive statistics and correlated to the IMDNCE scores. RESULTS: The mean (95% CI) of the CPI for all participants was 83.0 (80.8-85.2), with no correlation of CPI score with IMDNCE results in domains of communication, professionalism and patient safety (p > 0.05). However, the mean total of the CPI observation scores from doctors who graduated from public medical schools was higher than those graduating from private medical schools. Also, there were differences in scores related to the institution's accreditation grade (p < 0.05). CONCLUSION: There is no difference between CPI and national competency examination results. There was no statistical correlation between the clinical performance of new medical doctors during their internship to CBT and OSCE scores in the national competency examination. New doctors' performance during internship is affected by more complex factors, not only their level of competencies.