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Background and Aims An environmental nephropathy which is widely known as Chronic Kidney Disease of uncertain aetiology (CKDu) has been reported in dry zone of Sri Lanka and few other tropical countries. It is already become a major public health problem resulting immense social, economic and health impacts. In recent past, symptomatic presentation of CKDu with tubulitis (CKDuT)/ Acute Interstitial Nephritis indicating activity (AIN) has been reported from Sri Lanka and Central America. The AIN is a nonspecific response of kidney to an injurious agent. Usually the responsible aetiology is obvious in AIN, but not in CKDu cases, however, believed to be a sequel of interstitial nephritis. The aim of this study was to identify the occupational exposures or risk factors associated in AIN cases. Method In a two years of a comprehensive investigation, 60 individuals who reported with AIN were investigated. Once a case is reported, a home visit was carried out and behavioural pattern associated risk factors were assessed by a structured questionnaire in which working behaviours and conditions, spraying of agrochemical, usage of Personal Protective Equipment (PPE) and probable exposed environmental conditions were considered. Results Majority of AIN patients were male (90:10%) with the mean age of (44 ± 1.2) ranging from 26 - 62years. Among the study group, 53% were full time farmers while 77% of were doing farming either full time or part time. 55% of patients applied agrochemicals by themselves. 52% of individuals have used Personal Protective Equipment (PPE). 12% of individuals were sand miners while 7% and 5% were full time masons or labourers. 2% were engaged both farming and mason as full time employment. 15% were doing other employment except the above. Smoking, alcohol consumption and betel chewing were reported in the group as 50%, 57% and 72% respectively. Majority of patients were reported from Girandurukotte (17%), Wilgamuwa (32%) and Mahiyanganaya (35%) regions where CKDu are widely reported. Study indicated that there was no any significant pattern of AIN incidents over the study period. Conclusion Mean age of reported CKDuT were at least ten years younger than the mean age of CKDu. Comparatively higher number of sex ratio has been found in CKDuT indicating the male dominance. Some of the demographic features of AIN patients were similar with CKDu patients and both CKDu and AIN patients are engaged in farming either full time or part time.

P0224THE POSSIBLE LINK BETWEEN UNDETERMINED CHRONIC KIDNEY DISEASE (CKDU) AND ACUTE INTERSTITIAL NEPHRITIS (AIN) IN THE DRY ZONE REGIONS OF SRI LANKA