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Biomedical subjects

J Prasad

Publications and source records attributed to J Prasad.

64 records · Page 4Linked to original sources
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Acute oral toxicity and bacterial translocation studies on potentially probiotic strains of lactic acid bacteria.

Three potentially probiotic lactic acid bacteria (LAB) strains, Lactobacillus rhamnosus HN001 (DR20(TM)), Lb. acidophilus HN017 and Bifidobacterium lactis HN019 (DR10()), have recently been identified and characterized. The present study was designed to evaluate the acute oral toxicity of these strains to mice, and also to investigate bacterial translocation and gut mucosal pathology in BALB/c mice fed HN019, HN001 or HN017 for 8 consecutive days at a high dose of 10(11)cfu/mouse/day. Results showed that these probiotic strains had no adverse effect on general health status, feed intake, body weight gain and intestinal mucosal morphology (villus height, crypt depth, epithelial cell height and mucosal thickness). No viable bacteria were recovered from blood and tissue samples (mesenteric lymph nodes, liver and spleen) of mice, and no treatment-associated illness or death was observed. According to these results, the oral LD(50) of HN019, HN001 and HN017 is more than 50g/kg/day for mice, and their acceptable daily intake (ADI) value is 35g dry bacteria per day for a 70-kg person. This suggests that the probiotic strains HN019, HN001 and HN017 are non-pathogenic and likely to be safe for human consumption.

Administration, Oral↗
PubMedDate not supplied

Explanatory models and common mental disorders among patients with unexplained somatic symptoms attending a primary care facility in Tamil Nadu.

BACKGROUND: Patients with unexplained somatic symptoms are commonly seen in primary care. We assessed the explanatory models and common mental disorders in patients with unexplained somatic symptoms attending a primary care facility in a rural area of south India. METHODS: One hundred consecutive patients diagnosed to have unexplained somatic symptoms attending a primary care facility were examined. The Tamil version of the Revised Clinical Interview Schedule was used to assess common mental disorders and the Tamil version of the Short Explanatory Model Interview was used to assess their explanatory models. RESULTS: Ninety-eight patients thought that their problem was serious. Sixty-nine, 41 and 40 claimed that it affected their work, family and social lives, respectively. Forty-two of the patients believed in black magic. Forty-four patients satisfied the ICD-10 PC criteria for common mental disorders. Depression was the commonest diagnosis (63.6%). Patients with psychiatric diagnoses admitted to emotional problems (chi2 = 46.9; p < 0.001), and felt that their problems affected their family (chi2 = 38.5; p < 0.001), social life (chi2 = 28.6; p < 0.001) and work (chi2 = 34.4; p < 0.001). More patients who satisfied criteria for psychiatric diagnosis felt that their problems were moderate or very serious (chi2 = 21.5; p < 0.001) and they feared they might become disabled or die (chi2 = 12.2; p < 0.001). Psychiatric syndromes were significantly associated with belief in black magic (chi2 = 7.01; p < 0.01). These associations remained statstically significant after adjusting for age, gender, literacy and socioeconomic indices using logistic regression. CONCLUSION: The majority of patients held strong beliefs regarding the physical nature of their complaints, believed In the serious nature of the problem and feared disability or death. There is a need to elicit specific explanatory models regarding the nature of illness in patients who present with somatic symptoms without organic causes. Understanding the patient's perspectives is a prerequisite for providing the necessary treatment and to dispel fears.

Adult↗
PubMedDate not supplied

Symptoms related to the reproductive tract and mental health among women in rural southern India.

BACKGROUND: Symptoms related to the reproductive tract and symptoms of psychological distress are commonly seen in women living in South Asia. This study aimed to determine the association, if any, between symptoms related to the reproductive tract and mental health among women in rural southern India. METHODS: The study was conducted in a community setting of a comprehensive community health programme in a development block in rural southern India. It was a cross-sectional survey with a nested case-control study. The main outcome measure was the probability of mental distress as assessed by the Tamil version of the General Health Questionnaire-12 (GHQ). RESULTS: Of the 622 subjects recruited, 150 (24.4%) complained of at least one symptom related to the reproductive tract. The commonest symptom was vaginal discharge (17.5%). Significantly higher scores on the GHQ were associated with the presence of many current and past symptoms related to the reproductive tract, and receiving treatment for the same, even after adjusting for age, education, current marital status and type of house, using multiple regression analysis. GHQ scores were positively correlated with a higher number of current and past symptoms. Significantly higher scores were also associated with greater knowledge about prevention of sexually transmitted diseases and reproductive tract infections. Being currently married and educated were significant protective factors. A nested case-control study was done with the presence of a current common mental disorder as the outcome. Symptoms and other factors dated prior to this outcome were considered potential risk factors. Logistic regression models were developed. The presence of a symptom related to the reproductive tract for more than one month (OR 3.6; 95% CI 1.8, 7.2) and a history of similar symptoms over the past year (OR 2.2; 95% CI 1.3, 3.7) were risk factors for the development of common mental disorders. Higher education (OR 0.5; 95% CI 0.3, 0.7) and being currently married (OR 0.2; 95% CI 0.1, 0.6) were protective factors. CONCLUSION: The cross-sectional data suggest an association between symptoms pertaining to the reproductive tract and psychological distress. The results of the nested case-control study suggest that symptoms related to the reproductive tract are risk factors for common mental disorders, while education and being currently married are protective factors.

Adolescent↗
PubMedDate not supplied

Fine catheter aspiration cytology of the peritoneal cavity in the diagnosis of a metastatic tumor. Report of a case with immunocytochemical studies.

The potential value of a new system of fine catheter aspiration (FCA) cytology of the peritoneal cavity in the diagnosis of peritoneal malignancy is illustrated by a case report. Gelman filter preparations of an FCA sample of an abdominal mass from a patient with a history of adenocarcinoma of the lung showed unequivocal malignant cells, obviating the need for further diagnostic procedures. Trial immunostaining of Cytospin preparations of part of the FCA sample showed appropriate results, suggesting that such samples may be suitable for immunoperoxidase studies to identify tumor types or to predict the source of the primary tumor in difficult cases.

Adenocarcinoma↗
PubMedDate not supplied

On the contribution of height to predict lung volumes, capacities and diffusion in healthy school children of 10-17 years.

Lung volumes, capacities, diffusion and alveolar volumes with physical characteristics (age, height and weight) were recorded for 186 healthy school children (96 boys and 90 girls) of 10-17 years age group. The objective was to study the relative importance of physical characteristics as regressor variables in regression models to estimate lung functions. We observed that height is best correlated with all the lung functions. Inclusion of all physical characteristics in the models have little gain compared to the ones having just height as regressor variable. We also find that exponential models were not only statistically valid but fared better compared to the linear ones. We conclude that lung functions covary with height and other physical characteristics but do not depend upon them. The rate of increase in the functions depend upon initial lung functions. Further, we propose models and provide ready reckoners to give estimates of lung functions with 95 per cent confidence limits based on heights from 125 to 170 cm for the age group of 10 to 17 years.

Adolescent↗