Biomedical subjects

M L Gupta

Publications and source records attributed to M L Gupta.

At least 37 records · Page 2Linked to original sources

PubMed1992

Lack of smooth muscle in the small pulmonary arteries of the native Ladakhi. Is the Himalayan highlander adapted?

Chronic hypobaric hypoxia induces a mild degree of pulmonary arterial hypertension with structural alterations in the peripheral portions of the pulmonary arterial tree of the native Andean highlanders. On the other hand, animals indigenous to high altitude do not show these changes and are adapted to hypobaric hypoxia. The small pulmonary arteries of seven native Himalayan highlanders were examined at autopsy and found to be thin-walled with no medial hypertrophy of the muscular pulmonary arteries or muscularization of the arterioles. These findings suggest that the Himalayan highlanders may be adapted to hypobaric hypoxia.

Adaptation, Physiological↗

PubMed1992

Influence of prior information of drug toxicity on patient compliance.

Sixty patients with pulmonary tuberculosis, who had not received any chemotherapy in the past, were divided into two groups. All the patients were put on isoniazid, rifampicin and pyrazinamide for 8 weeks followed by isoniazid and rifampicin for another 18 weeks. Group A patients were informed of the likely occurrence of anorexia and/or vomiting but Group B patients were not. Routine and default retrieval home visits were given to ensure maximal drug compliance. Drug toxicity related early defaults were significantly less common in Group A patients (1 of 30) as compared to Group B (6 of 30).

Adult↗

PubMed1992

Epidemiology of rheumatic and congenital heart diseases in school children.

A stratified random sample of 10,263 school-going children in the age group of 6-16 years from government and private schools were screened for the prevalence of rheumatic fever, rheumatic heart diseases and congenital heart diseases. Fourteen children were found to have rheumatic heart disease with valvular lesions either single or in combination eg, pure mitral stenosis (6 cases), mitral regurgitation (4 cases), combined mitral stenosis and mitral regurgitation (3 cases) and aortic and mitral regurgitation (one case). Eight children had congenital heart diseases in the form of ventricular septal defect (3 cases), atrial septal defect (2 cases), patent ductus arteriosus (2 cases) and congenital bicuspid aortic valve (one case) while none had active rheumatic fever.

Adolescent↗

PubMed1991

Intestinal parasitism in Himachal Pradesh.

A total of 1629 cases were included in the study for the presence of intestinal parasites during 12 mobile camps in different areas of Himachal Pradesh. 47.08% were positive for parasites. The prevalence rate of helminthic parasites was 32.41% and that of protozoal parasites was 20.81%. The parasitic prevalence has been discussed in the light of peculiar geographical situation of the area.

Altitude↗

PubMed1991

Seroprevalence of HIV antibodies, Australia antigen and VDRL reactivity in Himachal Pradesh.

3000 subjects from four high risk groups--patients attending STD clinics, hospital personnel, blood donors and foreign nationals were screened for the presence of HIV antibodies HBsAg and VDRL reactivity. No evidence of HIV infection was found in Himachiali population. However, there of the 150 foreign nationals screened were found positive for HIV antibodies. Overall HBsAg positivity and VDRL reactivity was found to be 5.53 per cent and 9.07 per cent respectively. The importance of circumspected and unswerving machinery for the surveillance of HIV antibodies in the high risk population of the state is emphasised.

Adult↗

PubMed1991

Seroprevalence of HIV infection in Himachal Pradesh.

Serum samples from 2645 individuals representing all the twelve districts of Himachal Pradesh were screened for antibodies to Human immunodeficiency virus (HIV), employing ELISA test. These were categorised into four major high risk groups, viz, patients attending STD clinics (1305), voluntary blood donors (1012), hospital staff dealing with blood and blood products (200) and foreign nationals (128). No evidence of HIV infection was found in Himachali population. Two foreign nationals were repeatedly found positive for HIV antibodies by ELISA test and these were confirmed by Western Blot technique.

Adult↗

PubMed1991

Nocardia associated with pulmonary tuberculosis.

A total of 209 cases of pulmonary tuberculosis were screened for the presence of Nocardia in their sputa. In 2.9 per cent of the cases Nocardia asteroides was isolated. The increasing importance of this microorganism has been discussed in the light of other reports from India.

Chronic Disease↗

PubMed1990

Evidence for the inhibitory effect of 5-hydroxytryptamine at central and peripheral sites on ovulation in rabbits.

1. The effect of 5-hydroxytryptamine (5-HT) has been investigated on ovulation per se as well as on induced ovulation in rabbits. 2. 5-HT administered intracerebroventricularly (i.c.v.) did not induce ovulation per se. 3. The ovulation was induced by coitus, subcutaneous administration of progesterone and intravenous administration of cupric acetate. 4. Postcoital and progesterone induced ovulation was found to be blocked by i.c.v. administered 5-HT. 5. Cupric acetate induced ovulation was, however, not found to be blocked by i.c.v. administered 5-HT. 6. Intraperitoneal administration of 5-HT was found to block cupric acetate induced ovulation. 7. It is concluded that 5-HT exerts an inhibitory control over ovulation by acting at central as well as at peripheral sites in rabbits.

Animals↗

PubMed1990

Incidence of australia antigen (HBs Ag) in Himachal Pradesh.

2405 high risk subjects (1193 patients attending STD clinics, 1012 blood donors and 200 hospital personnel) and 500 apparently healthy individuals representing all the twelve districts of the State of Himachal Pradesh were screened for HBs Ag employing reverse passive haemagglutination (RPHA) technique. HBs Ag positivity was found to be 6.77 per cent in test groups and 3.6 per cent in the control group. Maximum positivity was found in STD patients (9.55 per cent) followed by hospital personnel (8 per cent) and blood donors (3.26 per cent). The highest incidence was noticed in district Kullu and no positive case was found in Lahaul and Spiti district of Himachal Pradesh. Remedial measures for prevention of Hepatitis-B virus infection have been emphasized.

Adult↗

PubMed1990

Response of reptilian liver to external gamma irradiation.

Adult healthy specimens of Uromastix hardwickii were exposed to three doses (i.e. 2.25, 4.50 and 9.00 Gy) of gamma radiation from a 60Cobalt source (experimental group). Five animals were sacrificed at each post-irradiation intervals of 1, 2, 3, 7 and 14 days. The liver was fixed in Bouin's fluid and after processing in a routine way, it was examined histologically. Five sham-irradiated animals (control group) were also sacrificed to compare the results. Low dose (i.e. 2.25 Gy) did not produce any apparent radiolesions in the liver. Changes in the form of cytoplasmic degranulation, swollen hepatocytes, pycnosis, increases in bile pigmentation were noticed after 4.50 and 9.00 Gy gamma ray exposure. Hyperaemia, widening of sinusoids and cytoplasmic vacuolation were also noticed in 9.00 Gy group. The liver exhibited normal picture on day 14 after exposure to both the doses. The radiolesions were found dose dependent.

Animals↗

PubMed1990

Response of piscine liver to external gamma irradiation.

Adult healthy specimens of Channa punctatus (fish) were exposed to three doses (i.e. 2.25, 4.50 and 9.00 Gy) of gamma radiations from a 60Cobalt source. Five animals were autopsied at each post-irradiation intervals of 1, 2, 3, 7 and 14 days. The liver was fixed in Bouin's fluid and after processing in a routine way, it was examined histologically and compared with control group. The radio lesions appeared on day 2 in 2.25 Gy dose group and on day 1 in 4.50 and 9.00 Gy dose groups. Signs of recovery was seen on day 7 in 2.25 Gy dose group. Liver exhibited normal picture on day 14 in 2.25 and 4.50 dose group but in 9.00 dose group the lesions persisted. The radiation effects were found dose dependent.

Animals↗

PubMed1989

Oil content and fatty acid composition of promising Indian Brassica campestris L. (Toria) genotypes.

Seeds of sixty four genotypes of Brassica campestris L. (Toria) were analyzed for oil content and fatty acid composition. Oil content varied from 38.9% to 44.6%. Major fatty acids viz. oleic, linoleic, linolenic, eicosenoic and erucic acids exhibited ranges from 10.1% to 17.3%, 5.9% to 14.5%, 5.2% to 15.0%, 7.7% to 13.7% and 39.6% to 59.9%, respectively. Compared to the standard cultivar ITSA, four genotypes contained 5 to 8% lower content of erucic acid; and six genotypes contained significantly higher content of linoleic acid. Oil was positively correlated with erucic acid. The observed inverse relationship between linoleic and erucic acid contents might be utilized in breeding nutritionally better Toria cultivars with both high linoleic and low erucic acid contents.

Brassica↗

PubMed1989

Acridine orange stain--a rapid method for diagnosis of neonatal septicemia.

The present study included 150 newborns; 100 clinically septic and 50 clinically aseptic who served as control. Out of 100 clinically septic newborns, blood culture was positive in 33 (33%), serum CRP was positive in 64 (64%) and acridine orange stained buffy coat smear was positive in 76 (76%). Serum CRP was found to be the most specific (specificity 96%) and acridine orange stained buffy coat smear examination the most sensitive (sensitivity 94.3%) test for diagnosis of neonatal septicemia.

Acridine Orange↗

PubMed1988

A study of central neurotransmitter mechanisms in morphine-induced 'Straub reaction' in mice: role of central dopamine receptors.

1. The role of putative neurotransmitters was investigated in morphine-induced Straub reaction (SR) in albino mice. 2. Apomorphine (15 mg/kg) was also effective in inducing SR. However, in a smaller dose (0.2 mg/kg) it blocked SR induced by morphine. 3. Morphine-induced SR was potentiated by tranylcypromine, reserpine (acute effect), imipramine and L-dopa and blocked by reserpine (chronic effect), alpha-methyldopa, pimozide, chlorpromazine, haloperidol and metoclopramide. Prazosin and clonidine partially blocked morphine SR in high doses. 4. Propranolol, yohimbine, cyproheptadine and atropine were ineffective in blocking morphine SR. 5. The results indicate that morphine SR is mediated through release of DA in the CNS which excites central D2 receptors. Activation of central alpha 1-adrenoceptors might also play a minor role.

Animals↗

PubMed1988