ABSTRACT
Infectious diarrhoea in neonates of animals is one of the most common and economically important conditions encountered in the livestock industry. Faecal samples (n=210) from diarrhoeic neonatal goat-kids of different livestock sheds of ICAR-CIRG, Makhdoom, Mathura (U.P.), were aseptically collected, and immediately processed for isolation of bacterial pathogens and parasitic evaluation. A total of 178 isolates of E. coli from 210 samples were identified on the basis of cultural, morphological, biochemical and molecular characteristics. Out of 178 E. coli isolates, 3.93 % (7/178) isolates were identified as STEC by PCR amplification of stx-1 and stx-2 gene. A total of 64 isolates of E. coli were sent to National Salmonella and Escherichia Centre, Central Research Institute, Kasauli for the serotyping. The common serogroups of E. coli responsible for neonatal diarrhoea in goat-kids were identified as O36, O26, O59, O29, O43, O91, O82, O9 and O171, out of which, 46.15% were O36, O26 and O59. Cryptosporidium spp. infection was detected in 46 samples out of 148 faecal samples by ZN staining and nested PCR.Based on cultural, morphological, biochemical and molecular characteristics,16 isolates of Salmonella spp. and 5 of Klebsiella spp. were identified from 210 fecal samples. The present study concluded that E. coli followed by Cryptosporidium spp. and Salmonella spp. were the prevalent infectious agents associated with neonatal diarrhoea in goat-kids
ABSTRACT
Background & objectives: There is a growing concern over the radiation exposure of patients from undergoing 18FDG PET/CT (18F-fluorodeoxyglucose positron emission tomography/computed tomography) whole body investigations. The aim of the present study was to study the kinetics of 18FDG distributions and estimate the radiation dose received by patients undergoing 18FDG whole body PET/CT investigations. Methods: Dynamic PET scans in different regions of the body were performed in 49 patients so as to measure percentage uptake of 18FDG in brain, liver, spleen, adrenals, kidneys and stomach. The residence time in these organs was calculated and radiation dose was estimated using OLINDA software. The radiation dose from the CT component was computed using the software CT-Expo and measured using computed tomography dose index (CTDI) phantom and ionization chamber. As per the clinical protocol, the patients were refrained from eating and drinking for a minimum period of 4 h prior to the study. Results: The estimated residence time in males was 0.196 h (brain), 0.09 h (liver), 0.007 h (spleen), 0.0006 h (adrenals), 0.013 h (kidneys) and 0.005 h (stomach) whereas it was 0.189 h (brain), 0.11 h (liver), 0.01 h (spleen), 0.0007 h (adrenals), 0.02 h (kidneys) and 0.004 h (stomach) in females. The effective dose was found to be 0.020 mSv/MBq in males and 0.025 mSv/MBq in females from internally administered 18FDG and 6.8 mSv in males and 7.9 mSv in females from the CT component. For an administered activity of 370 MBq of 18FDG, the effective dose from PET/CT investigations was estimated to be 14.2 mSv in males and 17.2 mSv in females. Interpretation & conclusions: The present results did not demonstrate significant difference in the kinetics of 18FDG distribution in male and female patients. The estimated PET/CT doses were found to be higher than many other conventional diagnostic radiology examinations suggesting that all efforts should be made to clinically justify and carefully weigh the risk-benefit ratios prior to every 18FDG whole body PET/CT scan.