Premature presbyopia: causes, diagnosis, and management strategies - an overview

Premature presbyopia refers to the early onset of age-related vision changes typically associated with presbyopia, a condition characterized by the loss of near vision accommodation. This review article aims to provide an overview of the causes, diagnosis, and management strategies for premature presbyopia. The database collected from PubMed, PubMed Central (PMC), Cochrane library, and Google scholar and research gate. This review discusses the potential underlying mechanisms contributing to premature presbyopia, including genetic factors, environmental influences, and ocular conditions. Additionally, the diagnostic criteria and assessment methods used to identify premature presbyopia and differentiate it from other vision disorders. Finally, this review examines various management options for premature presbyopia, including corrective lenses, pharmacological interventions, surgical procedures, and emerging treatments. By understanding the factors contributing to premature presbyopia and implementing appropriate management strategies, healthcare professionals can effectively address the needs of individuals experiencing early onset age-related vision changes.

Renal artery variants: a comprehensive cadaveric comparative study using morphological and corrosion casting technique

Background: Kidneys, crucial excretory organs, receive substantial blood supply through renal arteries. Variations in their anatomy are common, warranting detailed investigation. This study aims to comprehensively examine renal artery patterns using both gross dissection and the corrosion cast method. Methods: Thirty kidney pairs from cadavers were meticulously dissected at Subharti Medical College, Meerut, U.P. India. Gross features were carefully noted, and corrosion casts were meticulously prepared. Prevalence, origin, level, division, course, and variations were exhaustively recorded to provide a thorough understanding of renal vascular anatomy. Results: Main renal arteries were found to predominantly originate from the abdominal aorta in all specimens. Interestingly, a higher prevalence of origin of right renal arteries was observed, with 47% exhibiting a higher origin than their left counterparts. Further analysis revealed prehilar division in 38.3% and hilar division in 61.6% of specimens. Notably, a segmental pattern of renal arteries was observed. Accessory renal arteries (8%) were identified, including rare occurrences of bilateral and double accessory renal arteries. Of particular significance was the observation of an accessory renal artery passing anterior to the inferior vena cava, highlighting the intricacies of renal vascular variations. Conclusions: While reaffirming the conventional understanding of renal arterial anatomy, this study emphasizes the complexity and clinical relevance of variations in renal artery morphology. Such detailed insights are invaluable for surgical and radiological practice, underlining the importance of meticulous preoperative assessment to optimize patient outcomes.

Comparison between intraoperative and postoperative surgical outcomes of laparoscopic partial nephrectomy and open partial nephrectomy: laparoscopic versus open partial nephrectomy

Background: The aim of the study was to compare intraoperative and postoperative surgical outcomes of laparoscopic partial nephrectomy (LPN) and open partial nephrectomy (OPN). Methods: We did prospective retrospective study on 33 cases of renal mass operated as partial nephrectomy (PN) (15 LPN and 18 OPN) in department of urology and renal transplant SCB medical college Cuttack Odisha from 1 may 2019 to 1 may 2023. Surgical outcome of both approaches compared based upon intraop time, estimated blood loss, ischemia time, hospital stay, complications and rise in creatinine. Results: Mean intraop time 140.66 min in OPN vs 172.8 min in LPN (p<0.05-significant), mean estimated blood loss was 453 ml in OPN vs 345 ml in LPN (p=0.113-not significant), mean ischemia time was 15.88 min in OPN vs 20.53 min in LPN (p<0.05-significant), mean post op hospital stay was 7.5 days in OPN vs 6.3 days in LPN (p=0.184-not significant). Intra-op complications was 2 (11.11%) in OPN vs 2 (13.33%) in LPN and postop complications was in 5 (27.7%) in OPN vs 4 (26.66 %) in LPN. Mean rise in creatinine was 0.25 in OPN vs 0.29 in LPN (p=0.642-not significant). Conclusions: LPN is a feasible and safe alternative to OPN with comparable surgical outcomes but operating time and ischaemia time is significantly more in LPN as compare to OPN.

Developing public health capacities of Frontline Public Health Workforce in Uttarakhand

Recent COVID-19 pandemic has highlighted the importance of increase in the ability of public health workforce to detect and respond to the public health threats. For timely implementation of an adequate response and mitigation measure, the standardized and sustainable capacity building programme for frontline public health workforce is the need of hour. National Center for Disease Control (NCDC), Ministry of Health and Family Welfare, in partnership with U.S. Centers for Disease Control and Prevention (CDC), developed a three-month in-service Basic Epidemiology Training programme. This is a tailor-made programme for frontline public health workforce to strengthen epidemiological skills. This training was a practical interactive approach to field epidemiology for three months on the job training for frontline public health workforce that addressed the critical skills needed to conduct surveillance effectively at the local level while focusing on improving disease detection, reporting and feedback. The training also demonstrated the role of learning model in form of interaction between the mentor and the mentees. The importance of handhold support given by the mentors to the mentees in quality outbreak investigations and documentation.

Sexual functioning in females with depression in remission receiving escitalopram

Background & objectives: Sexual functioning is a strong determinant of quality of life. Sexual dysfunction has been widely reported due to depressive disorder as well as selective serotonin reuptake inhibitors. Thus, treatment with antidepressants can culminate in a double-edged sword, leading to drug discontinuation and symptom relapse. The objective of this study was to assess the sexual functioning of sexually active females with depression, currently in remission, receiving escitalopram and to compare with healthy controls. Methods: Fifty female patients with depression, currently in remission, with self-reported normal pre-morbid sexual function and receiving escitalopram for at least three months, were assessed on female sexual function index (FSFI) questionnaire and compared with healthy controls. Results: Half of the patients (n=25, 50%) in group A were found to have sexual dysfunction (FSFI score <26.55), while, 90 per cent (n=45) had decreased desire, 86 per cent (n=43) had decreased arousal, 54 per cent (n=27) had decreased lubrication, 68 per cent (n=34) had decreased orgasm, 62 per cent (n=31) had decreased satisfaction and 32 per cent (n=16) had pain during sexual activity. Patients receiving escitalopram had significantly higher sexual dysfunction as compared to healthy controls in mean total FSFI score (P < 0.001) and all mean domain scores of FSFI except pain. Interpretation & conclusions: A significant proportion of sexually active females with depression currently in remission, receiving escitalopram, reported dysfunction in all domains of sexual function; thus, routine screening for sexual dysfunction during follow up is advisable for early identification and prompt treatment.

Contribution of acrB upregulation & OmpC/Ompk36 loss over the presence of blaNDM towards carbapenem resistance development among pathogenic Escherichia coli & Klebsiella spp.

Background & objectives: The global spread of carbapenem-resistant Enterobacteriaceae (CRE) is an emerging clinical problem. Hence, in this study, the plausible role of extended-spectrum beta-lactamases (ESBLs)/carbapenemases, OmpC/Ompk36, acrB and their combinations was explored among CRE. Methods: The minimum inhibitory concentration (MIC) of meropenem, enzyme-phenotypes (ESBLs/IR and metallo-beta-lactamase (MBL)/non-MBL carbapenemase), genotypes (blaTEM, blaSHV and blaCTX-M; blaNDM and blaVIM; blaKPC and blaOXA-48-like variants), acrB and outer membrane protein (OMP) expressions were analyzed with a total of 101 non-duplicate clinical isolates, obtained from various samples of patients visiting two tertiary care units of Eastern India during May 2013 - October 2016. This included Escherichia coli (n=36) and Klebsiella pneumoniae (n=65), categorized into two groups, namely Group I (resistant to all carbapenems; n=93; E. coli=34 and Klebsiella spp.=59) and Group II (non-resistant to all the carbapenems; n=8; E. coli=2 and Klebsiella spp.=6). Results: Though 88.17 per cent of Group I isolates exhibited ESBL property, the presence of carbapenemase activity (70.96%) and that of blaNDM gene (42/66: 63.63%) indicated their contributions towards the emergence of CRE. Further, porin loss and/or efflux pump activation among ESBL/carbapenemase-producing isolates heightened the MIC of meropenem from 64 to 256 mg/l (range exhibited by only ESBL/carbapenemase-producing isolates) to >256 mg/l. Interpretation & conclusions: These findings implied the major contribution of porin loss and/or efflux pump activation over the presence of ESBLs/carbapenemases in imparting carbapenem resistance in pathogenic bacteria.

Generalized Estimating Equation In Pharmacological Study

Generalized Estimating Equation (GEE) deals with such data that do not have normal distribution in case of repeated experiment and has better properties as compared to rANOVA. With the objective to describe the use of GEE in pharmacological study this endeavour started. GEE described hereby using rat data. Four correlation structured were taken in GEE. It was found Independent/Exchangeable structure best suited with data. The model fit on data was assessed graphically as well. The trend line of repeated data for all cases (rats) were fallen in 95 % bound of predicted model. The model gave the average weight of rat 226.51 gram with start of experiment and it increases 8.67gram per week after feeding high fat diet.

Determination of Age of Epiphyseal Union of Bones Around Knee Joint by Radiological Approach in the Varanasi Region

Background: Age is an important parameter for medico-legal cases. Age of epiphyseal union is an important objective method of age determination. But these ages vary with racial, geographic and various other factors. These variations have suggested need of separate standards of ossification for separate regions. Methods: After approval from institutional ethical committee, present work was undertaken to work out ages of epiphyseal union around knee joint for Kolhapur region. Study was carried out in total 200 healthy subjects aging from 13 to 21 years.  Results: The chronological age was determined & A-P view of right knee joint was taken in each case. These radiographs were studied to determine the age of union of epiphyses of lower end of femur, upper end of tibia & upper end of fibula. Conclusions: These ages were compared with those reported from various states of India & abroad.

Association of organochlorine pesticides with the mRNA expression of tumour necrosis factor-alpha (TNF-α) & cyclooxygenase-2 (COX-2) genes in idiopathic preterm birth.

Background & objectives: Preterm birth (PTB) is an important cause of prenatal death, neonatal morbidity and mortality and adult illness. Increased inflammation occurs in normal parturition, and inflammatory cytokines and oxidative stress are found to be higher in PTB cases. The present study was planned to investigate the association of organochlorine pesticides (OCPs) with mRNA expression of inflammatory pathway genes such as tumour necrosis factor-alpha (TNF-α) and cyclooxygenase-2 (COX-2) in preterm delivery (PTD) cases. Methods: Maternal blood samples of PTD (n=30) cases and equal number of term delivery (n=30) were collected at the time of labour. Women occupationally exposed to OCPs and other high risk factors such as anaemia, hypertension, bacterial vaginosis, renal and heart disease, diabetes, etc. were excluded. The OCP levels were estimated by gas chromatography, and mRNA expressions of TNF-α and COX-2 genes were analysed using real-time PCR (qPCR). Results: Significantly higher levels of β-HCH (beta-hexachlorocyclohexane, 95% CI=2.08-4.633, P=0.001), p’p’-DDE (para, para-dichlorodiphenyldichloroethylene, 95% CI=0.546-2.551, P=0.003), and o’p’-DDD (ortho, para-dichlorodiphenyldichloroethane, 95% CI=0.004-0.690, P=0.047) were observed in maternal blood of PTB cases as compared to term delivery. The mRNA expressions of COX-2 and TNF-α genes were 3.13 and 2.31 folds higher in PTB cases in comparison to term delivery. Linear positive correlations were observed between period of gestation (POG) and ΔCt of COX-2 and TNF-α genes. Interpretation & conclusions: Environmental factors such as OCPs may be associated with inflammatory events showing gene-environment interaction in PTB cases. Evaluating the molecular control of inflammation along with gene environment interaction may be used as a model to explore the aetiology of idiopathic PTB cases and may be considered for the prognosis of adverse reproductive outcomes.

Prevalence, outcome and risk factor associated with vancomycin-resistant Enterococcus faecalis and Enterococcus faecium at a Tertiary Care Hospital in Northern India.

Purpose: To determine the prevalence, genotype, risk factors and mortality in patients having vancomycin-resistant Enterococcus faecalis (VR E. faecalis) and Enterococcus faecium (VR E. faecium) infection or colonisation. Materials and Methods: A total of 1488 clinical isolates of E. faecalis and E. faecium were tested for vancomycin resistance by phenotypic (disk diffusion, E-test and broth micro-dilution test) and genotypic polymerase chain reaction methods. Records of all 1488 patients who had E. faecalis or E. faecium infection or colonisation were reviewed for the identification of host, hospital and medication related risk factors associated with VR E. faecalis and VR E. faecium. Results: Of 1488 isolates, 118 (7.9%) were vancomycin-resistant and their distributions were as follows: E. faecalis =72 (61%) and E. faecium =46 (39%). All 118 vancomycin-resistant isolates were vanA genotype (minimum inhibitory concentration [MIC] to vancomycin ≥64 μg/ml and MIC to teicoplanin ≥32 μg/ml) and none of the isolates was vanB genotype. Multivariate logistic regression analysis identified ventilator support and hospital stay for ≥48 h as independent risk factors associated with VR E. faecalis and VR E. faecium infection or colonisation. Hospital stay ≥48 h was the only independent risk factor for mortality in patients infected with vancomycin-resistant enterococci. Conclusions: Strategies to limit the nosocomial infection especially in patients on ventilator support can reduce VRE incidence and related mortality.

Mortality and Other Outcomes in Relation to First Hour Fluid Resuscitation Rate: A Systematic Review.

Objective: To determine the effect of different regimen of first hour fluid administration rates on mortality and severe consequences of impaired circulation in 2 to 60 months old children with impaired circulation. Design: Systematic review of randomized controlled trials. Data sources: Various databases including PubMed, Cochrane Library and EMBASE were searched. Results: We found only two relevant trials; one was excluded as there was no comparator arm. Only one study (The FEAST Trial) compared boluses with maintenance fluid alone in children with severe febrile illness and one or more signs of impaired perfusion. The 48-hour mortality was more in the bolus group (RR 1.45, 95% CI 1.13,1.86). The quality of evidence is rated as ‘moderate’. For the children who met the WHO criteria for shock (severely impaired circulation) (n=65 children), those receiving boluses had higher mortality (RR 2.40, 95% CI 0.84, 6.88); the quality of evidence was rated as ‘very low’. Conclusions: A single large randomized controlled trial conducted in low-resource settings indicates that administration of fluid bolus is associated with higher mortality in comparison to the maintenance fluids alone in children with severe febrile illness and one or more signs of impaired perfusion. The findings are not generalizable to contexts with different severity of and different causes of shock and in centers with better facilities. There is urgent need for research in different settings to determine the optimal rate of fluid resuscitation in the first hour in children presenting with impaired circulation, particularly with severely impaired circulation.

A new approach of real time polymerase chain reaction in detection of vancomycin-resistant enterococci and its comparison with other methods.

Background: Vancomycin-resistant enterococci (VRE) are third leading cause of nosocomial infection. Therefore, an effective, accurate and early detection of VRE along with their minimum inhibitory concentrations (MICs) is required to initiate appropriate therapy and thus better patient outcome. Objective: To detect VRE by real time quantitative polymerase chain reaction (Q-PCR) and to compare the results with chrom ID (C-ID) VRE and PCR. Further the study also determined the fold change of vanA gene by Q-PCR in different groups of VRE isolates classified on the basis of glycopeptides MIC range. Subjects and Methods: A total of 145 (80 VRE and 65 vancomycin-susceptible enterococci) clinical isolates were included in the study. After the screening of VRE isolates MICs were determined by E-test and agar dilution method. Further VRE was confirmed by vanA and vanB specific PCR and Q-PCR. Results: The sensitivity and specificity of C-ID VRE was 100% and 95.38%. However, sensitivity and specificity of conventional and Q-PCR were found to be 100%. Conventional and Q-PCR confirmed that our all isolates were vanA type. Mean R value was significantly higher ( P < 0.001) in group I (MIC > 1024 μg/ml) when compared to group II (MIC 512-1024 μg/ml) and group III (MIC < 512 μg/ml) isolates. The mean R was also significantly higher in group II when compared to group III isolates ( P = 0.038). Conclusion: Q-PCR is a rapid technique to detect vanA in enterococci along with their MIC range, thus it might be helpful to decide the treatment modalities of infections caused by VRE.

Can Metabolic Factors be Used Prognostically for Short-Term Mortality in HIV-Infected Patients?

Background: Metabolic abnormalities are common throughout the course of human immunodeficiency virus (HIV) infection and may occur either due to HIV infection or as a result of side effects of antiretroviral therapy. It has been established that dyslipidemia and dysglycemia associated with HIV disease reduce the long-term survival of the patients; but their role for predicting prognosis of short-term mortality in HIV patients is unknown. Aim: To study dyslipidemia and dysglycemia as a prognostic indicator for short-term mortality (3 months) in HIV patients. Subjects and Methods: An observational; prospective study was conducted at a tertiary care center over a period of 6 months. Consecutive HIV-positive patients hospitalized (both; HIV status known prior to hospitalization and the diagnosis made for the first time at admission) in medical wards from March to May 2010 were studied. All patients had their random blood sugars; fasting blood sugars (if possible); fasting lipid profile; and cluster of differentiation 4 (CD4) counts tested at the time of enrollment. The patients were followed for a period of 3 months; at the end of which they were categorized as survivors and non-survivors; and the demographic; clinical; and investigational parameters were compared between the above groups. Data was analyzed by applying Mann-Whitney U test; two sample t-test; Fisher-Exact test; and stepwise logistic regression analysis of significance; using the computer-based program; Stata; version 11.1. Results: A total of 82 patients were enrolled for the study of which 64 (78.05) were males and 18 (21.95) were females; with a mean (SD) age of 34.00 (7.0) years. The mean CD4 count was 206.23 (129.5) cells/mm 3 . The overall mortality within 3 months was 20.7 (17/82). Mycobacterium tuberculosis as opportunistic infection was found in 42 patients; out of which 13 expired (P

Can Metabolic Factors be Used Prognostically for Short-term Mortality in HIV-infected Patients?

Metabolic abnormalities are common throughout the course of human immunodeficiency virus (HIV) infection and may occur either due to HIV infection or as a result of side effects of antiretroviral therapy. It has been established that dyslipidemia and dysglycemia associated with HIV disease reduce the long-term survival of the patients; but their role for predicting prognosis of short-term mortality in HIV patients is unknown. Aim: To study dyslipidemia and dysglycemia as a prognostic indicator for short-term mortality (3 months) in HIV patients. Subjects and Methods: An observational; prospective study was conducted at a tertiary care center over a period of 6 months. Consecutive HIV-positive patients hospitalized (both; HIV status known prior to hospitalization and the diagnosis made for the first time at admission) in medical wards from March to May 2010 were studied. All patients had their random blood sugars; fasting blood sugars (if possible); fasting lipid profile; and cluster of differentiation 4 (CD4) counts tested at the time of enrollment. The patients were followed for a period of 3 months; at the end of which they were categorized as survivors and non-survivors; and the demographic; clinical; and investigational parameters were compared between the above groups. Data was analyzed by applying Mann-Whitney U test; two sample t-test; Fisher-Exact test; and stepwise logistic regression analysis of significance; using the computer-based program; Stata; version 11.1. Results: A total of 82 patients were enrolled for the study of which 64 (78.05) were males and 18 (21.95) were females; with a mean (SD) age of 34.00 (7.0) years. The mean CD4 count was 206.23 (129.5) cells/mm 3 . The overall mortality within 3 months was 20.7(17/82). Mycobacterium tuberculosis as opportunistic infection was found in 42 patients; out of which 13 expired (P

Profile of CD4 Counts and Symptoms in HIV Positive Patients on and not on Antiretroviral Therapy.

This communication pertains to a study on analysis of the profile of CD4 counts and symptoms in HIV infected adult subjects on and not on antiretroviral therapy. Clinical symptoms in HIV infected patients attending a tertiary care hospital in north India were recorded by direct questioning. Differences in distribution of categorical variables were analyzed using chi-square test. A p-value <0.05 was considered statistically significant. 317 enrolled HIV positive patients, 271/317 (85.5%) patients were symptomatic. The common symptoms were weakness (65.6%), bodyache and joint pain (63.4%), lethargy and fatigue (62.5%), prolonged fever (53.3%), weight loss (47.6%), cough (44.5%), loss of appetite (44.2%) and chronic diarrhoea (40.1%). Most symptoms were found significantly less frequently in patients on antiretroviral therapy (ART). High CD4+ T-cell counts were negatively associated with symptoms. The overall proportion of symptomatic patients was significantly higher than the number with an etiologically documented opportunistic infections (32.5%). Pulmonary tuberculosis (30.9%) was the most frequently documented opportunistic infection. Antiretroviral therapy appears to be beneficial in reducing symptoms in HIV positive patients. Affordable high quality laboratory diagnostic facilities for the diagnosis of opportunistic infections under the public health program will help to obtain an accurate picture of the range of opportunistic infections in HIV patients in India.

Molecular identification of methanogenic archaea from Surti buffaloes (bubalus bubalis), reveals more hydrogenotrophic methanogens phylotypes

Methane emissions from ruminant livestock are considered to be one of the more potent forms of greenhouses gases contributing to global warming. Many strategies to reduce emissions are targeting the methanogens that inhabit the rumen, but such an approach can only be successful if it targets all the major groups of ruminant methanogens. Therefore, a thorough knowledge of the diversity of these microbes in breeds of buffaloes, as well as in response to geographical location and different diets, is required. Therefore, molecular diversity of rumen methanogens in Surti buffaloes was investigated using 16S rRNA gene libraries prepared from pooled rumen contents from three Surti buffaloes. A total of 171 clones were identified revealing 23 different sequences (phylotypes). Of these 23 sequences, twelve sequences (12 OTUs, 83 clones) and 10 sequences (10 OTUs, 83 clones) were similar to methanogens belonging to the orders Methanomicrobiales and Methanobacteriales, and the remaining 1 phylotype (5 clones) were similar to Methanosarcina barkeri. These unique sequences clustered within a distinct and strongly supported phylogenetic group. Further studies and effective strategies can be made to inhibit the growth of Methanomicrobiales and Methanobacteriales phylotypes to reduce the methane emission from rumen and thus help in preventing global warming.

Inverted papilloma of the urinary bladder: Rigorous surveillance needed: An Indian experience.

Aims: Inverted papilloma (IP) is an uncommon benign neoplasm of the urinary tract. Its multiplicity, recurrence, and association with transitional cell carcinoma (TCC) leads to conflicting clinical conclusions regarding its biological behavior, and hence, the need for rigorous follow-up protocols. In this study, we review all cases of urinary bladder IP in our institution and determine the need for strict follow-up. Materials and Methods :0 We included consecutive patients from August 2004 to August 2008 with IP of the urinary bladder in this study who did not have prior or concurrent urothelial carcinoma. A single pathologist performed the histologic review. The patients had undergone strict a follow-up schedule every 6 months. Results: In our study of the 24 patients, the mean age at presentation was 53.5 (range 22-81) years. The mean follow-up period was 25.8 months (range 6-58 months). Of the 24 patients, 21 were men and 3 were women. No patient had a synchronous or previous bladder tumor. The most common presenting symptoms were macroscopic hematuria and dysuria. All were solitary tumors except one, most commonly found at the bladder neck and trigone. The average follow-up period was 2.5 years without any evidence of recurrence. Conclusions: We conclude that when diagnosed by strictly defined criteria, IP as benign urothelial neoplasm was with extremely low incidence of recurrence and good prognosis. It does not seem to be a risk factor for TCC, especially if located in the bladder. Therefore, a good transurethral resection is adequate therapy and follow-up protocol as rigorous as those for TCC may not be necessary.

Attenuation of phosphamidon-induced oxidative stress and immune dysfunction in rats treated with N-acetylcysteine

The effect of N-acetylcysteine, a thiolic antioxidant, on attenuation of phosphamidon-induced oxidative stress and immune dysfunction was evaluated in adult male Wistar rats weighing 200-250 g. Rats were divided into four groups, 8 animals/group, and treated with phosphamidon, N-acetylcysteine or the combination of both for 28 days. Oral administration of phosphamidon (1.74 mg/kg), an organophosphate insecticide, increased serum malondialdehyde (3.83 ± 0.18 vs 2.91 ± 0.24 nmol/mL; P < 0.05) and decreased erythrocyte superoxide dismutase (567.8 ± 24.36 vs 749.16 ± 102.61 U/gHb; P < 0.05), catalase activity (1.86 ± 0.18 vs 2.43 ± 0.08 U/gHb; P < 0.05) and whole blood glutathione levels (1.25 ± 0.21 vs 2.28 ± 0.08 mg/gHb; P < 0.05) showing phosphamidon-induced oxidative stress. Phosphamidon exposure markedly suppressed humoral immune response as assessed by antibody titer to ovalbumin (4.71 ± 0.51 vs 8.00 ± 0.12 -log2; P < 0.05), and cell-mediated immune response as assessed by leukocyte migration inhibition (25.24 ± 1.04 vs 70.8 ± 1.09%; P < 0.05) and macrophage migration inhibition (20.38 ± 0.99 vs 67.16 ± 5.30%; P < 0.05) response. Phosphamidon exposure decreased IFN-у levels (40.7 ± 3.21 vs 55.84 ± 3.02 pg/mL; P < 0.05) suggesting a profound effect of phosphamidon on cell-mediated immune response. A phosphamidon-induced increase in TNF-α level (64.19 ± 6.0 vs 23.16 ± 4.0 pg/mL; P < 0.05) suggests a contributory role of immunocytes in oxidative stress. Co-administration of N-acetylcysteine (3.5 mmol/kg, orally) with phosphamidon attenuated the adverse effects of phosphamidon. These findings suggest that oral N-acetylcysteine treatment exerts protective effect and attenuates free radical injury and immune dysfunction caused by subchronic phosphamidon exposure.

Melatonin treatment prevents modulation of cell-mediated immune response induced by propoxur in rats.

The effect of melatonin, a major secretory product of the pineal gland, in attenuation of propoxur (2-isopropoxy phenyl N-methyl carbamate)-induced modulation of cell-mediated immune (CMI) response was studied in rats. Male Wistar albino rats were exposed to propoxur (a widely used pesticide) orally (10 mg/kg) and/or melatonin (10 mg/kg) orally for 4 weeks. CMI was measured by delayed-type hypersensitivity (DTH), leucocyte and macrophage migration inhibition (LMI and MMI) responses and estimation of cytokines TNF-alpha and IFN-gamma levels. Rats exposed to propoxur for 4 weeks showed significant decrease in DTH, LMI and MMI responses. Propoxur also suppressed TNF-alpha and IFN-gamma production significantly. Administration of melatonin alone caused a significant increase in DTH response. Although there were no changes in the LMI and MMI response, the cytokine levels were significantly increased, as compared to control. Co-administration of melatonin along with propoxur significantly nullified the effect of the pesticide on the CMI response, except DTH and reversed levels of cytokines to near control/normal values. Thus, melatonin treatment considerably attenuated immunomodulation caused by sub-chronic treatment of propoxur in experimental animals.

Study of bio-physico-chemical parameters of Mothronwala swamp, Dehradun (Uttarakhand).

Aquatic biodiversity is one of the most essential characteristics of the aquatic ecosystem formaintaining its stability and a means of coping with any environmental change. The entire stretch of the Mothronwala swamp has rich riparian vegetation for providing conducive environment for the growth of aquatic organisms. The present work has been undertaken to study the bio-physico-chemical characteristics of the swamp. The data on physico-chemical environmental variables (temperature, total dissolved solutes, size and composition of substratum, pH, dissolved oxygen, alkalinity chlorides, and hardness) have been given under the present contribution. A total of 16 genera of aquatic insects belonging to orders Trichoptera, Coleoptera, Hemiptera, Ephemeroptera, Odonata and Phylum Mollusca represented the macroinvertebrates of Mothronwala swamp. The fresh water swamp of Mothronwala is under threat due to human interference and other anthropogenic activities. Some of the natural and anthropogenic environmental problems of the Mothronwala swamp have been identified and the ameliorative measures for the protection of aquatic environment and the conservation measures for the swamp have been suggested. The qualitative study revealed the present status of the aquatic biodiversity of the swamp and also about the physico-chemical parameters, which would be very helpful for policy makers to take precautionary measures to save the swamp.