Biomedical subjects
Publications and source records attributed to N Lakshmi.
Oral manifestations may be the important indicators of ongoing human immunodeficiency virus (HIV) infection. Serum samples were collected from 100 patients repeatedly attending dental outpatients' department of SV Medical College and SVRR Hospital, Tirupati and tested for the presence of HIV antibodies. HIV 1 antibodies were detected in one person, the seropositivity rate being 1%.
A primary testicular tumour in a 62 year old man was found to be a plasmacytoma on histopathological examination without any extra testicular disease prior to or subsequent to orchiectomy, fulfilling the criteria for the primary extramedullary plasmacytoma. Such cases are extremely rare. Evaluation of such a case was discussed and the relevant literature reviewed.
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Serum samples were collected from 140 cancer cervix patients aged between 25-60 years and also from 20 age matched, married, healthy women to serve as controls. These sera were tested for HSV-2 antibodies by ELISA test and HBsAg by RPHA test. HSV-2 antibodies were detected in 92 (65-71%) and HBsAg in 25 (17.8%) cancer cervix patients. Sera from control group were negative for HSV-2 antibodies and HBsAg.
Twenty-five cases of human anthrax, occurring after contact with a Jercy cow infected with B. anthracis and consumption of its improperly cooked meat after death, were reported. Cutaneous anthrax was the predominant variety in 18 persons, 7 had intestinal anthrax, out of them 2 children died, 5 adults survived and one among them developed associated cutaneous anthrax also. All the persons with cutaneous anthrax recovered with treatment.
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One hundred clinically diagnosed cases of Tinea capitis were studied to know the clinical types and the causative agents. The incidence of grey patch, Kerion and black dot being 60%, 31% and 9% respectively. Tinea capitis was found to be more common in males (58%) than in females (42%) and it is more prevalent in children aged between 6-15 years. Trichophyton violaceum is the predominant (63.15%) fungal species isolated.
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540 strains of bacteria isolated from various clinical materials comprising 440 strains of Gram negative bacilli and 100 strains of Gram positive cocci were tested for their susceptibility in vitro to Kanamycin, Gentamicin and a new aminoglycoside antibiotic Sisomicin (Ensamycin). The sensitivity pattern revealed that 68.88% of the strains were sensitive to Kanamycin, 82.9% to Gentamicin and 89.0% to Sisomicin. The effectiveness of Sisomicin is comparatively greater (6.1%) than the other two aminoglycosides. In particular a considerable number of Gentamicin resistant Pseudomonas aeruginosa (12.3%) were found to be sensitive to Sisomicin which is a highly desirable property. Existence of about 11% Sisomium resistant strains even before the wide usage of this antibiotic is note worthy.
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OBJECTIVES: The present paper focuses on the study of the patterns of genetic microdifferentiation among one of the substructured caste populations of Andhra Pradesh, namely Vysya, with reference to 17 other Telugu speaking populations from the same region of India. SUBJECTS AND METHODS: A total of 302 individuals from the three Vysya subgroups (101 of Arya Vysya, 100 from Kalinga Vysya and 101 from Thrivarnika) were typed in 17 blood groups and protein polymorphisms. Nei's gene diversity analysis, as well as neighbour-joining tree and UPGMA cluster diagrams, derived from standard genetic distances, R-matrix analysis and a regression model for investigating the patterns of external gene flow and genetic drift due to isolation under the island model, were done at two levels: (1) considering only the three Vysya populations and (2) considering common loci among 20 populations of Andhra Pradesh. RESULTS: Seven of the 17 systems investigated were found to be monomorphic among all the three Vysya groups. The UPGMA tree and bidimensional scaling of the D(2) distances derived from R-matrix analysis show a very distinct cluster of Vysya populations. Application of the model of regression of average heterozygosity versus the distance of populations from the centroid shows the three Vysya populations placed as clear outliers above the theoretical regression line. CONCLUSIONS: Different approaches employed in this study give support to the hypothesis of different origin and/or demographic story for the three Vysya groups compared with other populations of Andhra Pradesh.