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Biomedical subjects

S K Shahi

Publications and source records attributed to S K Shahi.

At least 19 recordsLinked to original sources
PubMed2002

Covert bacteriuria in nephrotic syndrome.

Prevalence of covert bacteriuria in patients of nephrotic syndrome admitted for kidney biopsy was studied in 205 patients. Age ranged from 10 years to 65 years. 148 patients were male and 57 were female. Prevalence of covert bacteriuria was found in 38 patients (18.53%). In bacteriuric patients 30 were male, 8 were female. Escherichia coli was the commonest organism grown in bacteriuric patients (30 or 78.9%). Serum albumin was low and 24-hour urinary protein excretion was high in bacteriuric patients in comparison to abacteriuric patients. In bacteriuric patients membranous nephropathy was the commonest histopathological finding present in 15 patients (39.47%).

Adolescent↗
PubMed2002

CA 242--a step ahead.

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Antigens, Tumor-Associated, Carbohydrate↗
PubMed2002

A study of keratomycosis: our experience.

The aim of the present study was to determine the etiological agents, predisposing factors and important diagnostic tests in keratomycosis in Patna. During period of 2 years, 204 clinically suspected cases of keratomycosis were studied by microscopy (10% KOH smear preparation and Gram's staining) and culture (for bacteria as well as fungus). Out of 204 clinically suspected cases, 76 cases (37.23%) were reported positive for fungus by microscopy and culture. 77% cases were between the age group of 21 to 50 years. Males were more than double the number of females affected. 82% patients were farmers by occupation. 81.58% cases gave a definite history of antecedent corneal trauma. 6.58% cases were known diabetics. Peak incidence was recorded in the months of September-October of the years. Single fungal isolates were present in 63 cases (31%) and multiple were there in 3 cases (1.47%). Mixed isolates of bacteria and fungi were there in 4.90% cases. The predominant isolate was Aspergillus species--42 cases (52.26%) followed by Candida--7 cases (9.21%), Penicillium--6 cases (7.89%) and Fusarium-6 cases (7.89%). Ten (13.15%) of fungal isolates remained unidentified. Therefore mycotic keratitis should be suspected in every patient with a corneal lesion and should be ruled out promptly to save sight and before commencing steroids and antibiotics.

Adolescent↗
PubMed2001

Characterisation of the growth and differentiation in vivo and in vitro-of bloodstream-form Trypanosoma brucei strain TREU 927.

Trypanosoma brucei TREU 927/4 has been chosen as the reference strain targeted for complete sequencing of the genome of the African trypanosome. This line is pleomorphic in mammalian hosts and is fly transmissible; however it is relatively unstable with respect to variable surface glycoprotein (VSG) expression. Therefore, we subjected TREU 927/4 to 27 rapid syringe passages through mice, and derived a cloned line which expressed Glasgow University Trypanozoon antigen type (GUTat) 10.1 with relative stability. This line also retained pleomorphism in the bloodstream, being able to generate homogeneous populations of stumpy forms in mice. Furthermore, these parasites remain able to transform to procyclic forms synchronously in vitro and can complete their life cycle in tsetse flies. The passaged cell line was also adapted to in vitro bloodstream-form culture and transfected with a construct encoding the tetracycline repressor (TETR) protein. The resulting TETR subline no longer expressed the GUTat 10.1 VSG but remained able to generate uniform populations of stumpy form cells in mice immunocompromised with cyclophosphamide. They could also differentiate to procyclic forms synchronously in vitro. The generated lines and analyses of their growth and differentiation will provide a basic resource for the analysis and interpretation of gene function in the T. brucei genome reference strain.

Animals↗
PubMed2001

Prevalence of hepatitis B and hepatitis C virus coinfection in chronic liver disease.

Coinfection with HBV and HCV may lead to serious consequences. The present study was done to find out the prevalence of coinfection in patients with chronic liver disease. From patients with hepatitis and chronic liver disease 1673 samples were received and analysed for HBsAg by ELISA. 1342 samples were analysed for anti HCV by third generation ELISA. 493 samples positive for HBsAg were also analysed for Anti HCV to see the prevalence of coinfection. 15(3.0%) were found positive for both HBsAg and anti HCV. Out of 15 patients with coinfection 4 (26.6%) had HCC. Prevalence of HCC in patients with coinfection was higher than either infection alone i.e. HBV-9.1% and HCV-16.5%.

Carcinoma, Hepatocellular↗
PubMed2001

Prostate specific antigen as tumor marker: relationship with histologic grading.

PSA is emerging as the best marker in oncology and had a profound impact on all aspects of prostate cancer care. From clinically suspected prostate tumor, 395 serum samples were taken out and estimated for serum PSA. Among elevated serum PSA, 98 were correlated with histologic findings. 42(42.8%) cases were BHP among 98 cases and 78.7% had serum PSA level within 10 ng/ml. 5 patients (5.1%) had PIN histologically, 3(60%) of which had PSA level upto 10 ng/ml and 2(40%) had serum PSA upto 20 ng/ml. 51(52%) were adenocarcinoma prostate of different grades and PSA level varies from less than 10 ng/ml to more than 50 ng/ml which almost correlates with the tumor grades.

Adenocarcinoma↗
PubMed2001

Covert bacteriuria in nephrotic syndrome.

Prevalence of covert bacteriuria in patients of nephrotic syndrome admitted for kidney biopsy was studied in 205 patients. Age ranged from 10 years to 65 years. 148 patients were male and 57 were female. Prevalence of covert bacteriuria was found in 38 patients (18.53%). In bacteriuric patients 30 were male, 8 were female. Escherichia coli was the commonest organism grown in bacteriuric patients (30 or 78.9%). Serum albumin was low and 24-hour urinary protein excretion was high in bacteriuric patients in comparison to abacteriuric patients. In bacteriuric patients membranous nephropathy was the commonest histopathological finding present in 15 patients (39.47%).

Adolescent↗
PubMed2001

Bioterrorism.

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Anthrax↗
PubMed2001

Coagulase negative Staphylococci as causative agents of urinary tract infections-prevalence and resistance status in IGIMS, Patna.

Previously considered solely as the laboratory contaminants and normal flora of skin in man, coagulase negative Staphylococci are now a major cause of nosocomial and opportunistic infections. This study was conducted at IGIMS, Patna to find out the coagulase negative Staphylococcus isolates from urine and their antimicrobial resistance. In a period of ten months, the relative frequency of main coagulase negative Staphylococci were as follows--Staphylococcus epidermidis-45.90%, Staphylococcus saprophyticus 34% and Staphylococcus haemolyticus-8.50%. others were 11.60%. most of the Staphylococcus saprophyticus was isolated from young female patients suffering from uncomplicated acute cystitis and Staphylococcus epidermidis was mainly from patients with indwelling catheters and complicated cases. Staphylococcus saprophyticus showed the highest sensitivities to all the antimicrobials whereas Staphylococcus haemolyticus had the highest resistance rates. 66.6% of staphylococcus epidermidis and 60% of staphylococcus haemolyticus were resistant to oxacillin, whereas only 10% of staphylococcus saprophyticus resistant and 90% were sensitive to it. As is in the emerging state, vancomycin resistance was very less but in future it may cause a major problem to treat these cases. So this area needs further exploration.

Adolescent↗
PubMed2000

Thiazolidinedione-induced activation of the transcription factor peroxisome proliferator-activated receptor gamma in cells adjacent to the murine skeletal muscle: implications for fibroblast functions.

Nuclear peroxisome proliferator-activated receptor gamma (PPARgamma) is the target of antidiabetogenic thiazolidinediones (TZD). However, recent studies failed to show that TZD has an effect in vitro on insulin-regulated glucose uptake in skeletal muscles, the major site of glucose disposal. The potential effects of TZD on cells adjacent to skeletal muscles are not well characterized but may be involved in TZD's actions. Hence, we studied these cells from mice treated with the carrier and with the TZD ciglitazone (9 nmol/g body weight). The cells were typified by lipid enrichment (floating adipocytes and macrophages), by the ectopic expression of cellular fibronectin (fibroblasts), fibronectin and PPARgamma (preadipocytes), PPARgamma and CD11b/Mac-1 (active macrophages) as revealed by flow cytometry and immunoblotting. The glucose transporter 4 proteins (GLUT4) and the uptake of glucose and long-chain fatty acids (LCFA) were determined flow cytometrically using fluorescent derivatives of glucose (NBDG) and LCFA (C16-Bodipy). The expression of tumor necrosis factor alpha (TNFalpha) in CD11b/Mac-1-positive and CD11b/Mac-1-negative cells separated by magnetic immunobeads was analyzed. The results showed that TZD treatment upregulated GLUT4 expression, and increased insulin-regulated NBDG uptake and C16-Bodipy binding and influx, at the same time as increasing the quantity of PPARgamma-expressing fibroblasts; this indicates the development of the preadipocyte phenotype. In contrast, TZD lowered the number of adipocytes (0.6-fold compared to the carrier-treated control) perhaps through an action of TNFalpha from CD11b- and PPARgamma-expressing macrophages. The data suggest that the regulatory effects of TZD on energy homeostasis involve two major targets: the PPARgamma-positive fibroblasts whose adipogenic program is promoted, and CD11b-PPARgamma-expressing macrophages which become cytotoxic and fibrogenic because of the effects of TNFalpha on neighboring adipocytes and fibroblasts, respectively.

Adipocytes↗