Identification of Eight High Yielding Strains via Morpho-Molecular Characterization of Thirty-Three Wild Strains of Calocybe indica

Calocybe indica, generally referred as milky mushroom, is one of the edible mushroom species suitable for cultivation in the tropical and sub-tropical regions of the world. However, lack of potential high yielding strains has limited its wider adaptability. To overcome this limitation, in this study, the germplasms of C. indica from different geographical regions of India were characterized based on their morphological, molecular and agronomical attributes. Internal transcribed spacers (ITS1 and ITS4)-based PCR amplification, sequencing and nucleotide analysis confirmed the identity of all the studied strains as C. indica. Further, evaluation of these strains for morphological and yield parameters led to the identification of eight high yielding strains in comparison to the control (DMRO-302). Moreover, genetic diversity analysis of these thirty-three strains was performed using ten sequence-related amplified polymorphism (SRAP) markers/combinations. The Unweighted Pair-group Method with Arithmetic Averages (UPGMA)-based phylogenetic analysis categorized the thirty-three strains along with the control into three clusters. Cluster I possesses the maximum number of strains. Among the high yielding strains, high antioxidant activity and phenol content was recorded in DMRO-54, while maximum protein content was observed in DMRO-202 and DMRO-299 as compared with the control strain. The outcome of this study will help the mushroom breeders and growers in commercializing C. indica.

Identification and morpho-molecular characterization of low spore strain in oyster mushroom

BACKGROUND

Sporocarps of oyster mushroom liberate enormous spores and cause allergic reactions to workers involved in its cultivation. These spore-related allergies include stiffness or pain in the forearms, limbs, itchy throat, grogginess, and respiratory problems and are major problems during oyster mushroom cultivation.

METHODS AND RESULTS

In this study, we have generated seven hybrids using single-spore isolates (SSIs) of Pleurotus ostreatus var. florida (DMRP-49) and P. ostreatus (DMRP-30). Chimera was observed during cultivation trial of these hybrids and led to the development of low spore-producing/sporeless strain (DMRP-395) as evident from spore print and microscopic analysis. Further, the cultivation trial of this sporeless strain revealed a bunchy fruiting pattern and required 20-24 °C temperature for fruiting. At par yield was observed in sporeless strain. Notably, a prominent infundibuliform-shaped pileus along with central attachment of stipe was observed in the sporeless strain. Moreover, genetic diversity and principal component biplot analysis revealed resemblance of sporeless strain with one of the parental strain, i.e., P. ostreatus var. florida (DMRP-49).

CONCLUSIONS

The developed sporeless strain (DMRP-395) contains high protein and at par yield as compared with the control (DMRP-136). This sporeless strain will be helpful to reduce spore-related allergic responses in mushroom growers.

Identification of Key Regulatory Pathways of Basidiocarp Formation in Pleurotus spp. Using Modeling, Simulation and System Biology Studies

Pleurotus (Oyster mushroom) is an important cultivated edible mushroom across the world. It has several therapeutic effects as it contains various useful bio-molecules. The cultivation and crop management of these basidiomycete fungi depends on many extrinsic and intrinsic factors such as substrate composition, growing environment, enzymatic properties, and the genetic makeup, etc. Moreover, for efficient crop production, a comprehensive understanding of the fundamental properties viz. intrinsic–extrinsic factors and genotype-environment interaction analysis is required. The present study explores the basidiocarp formation biology in Pleurotus mushroom using an in silico response to the environmental factors and involvement of the major regulatory genes. The predictive model developed in this study indicates involvement of the key regulatory pathways in the pinhead to fruit body development process. Notably, the major regulatory pathways involved in the conversion of mycelium aggregation to pinhead formation and White Collar protein (PoWC1) binding flavin-chromophore (FAD) to activate respiratory enzymes. Overall, cell differentiation and higher expression of respiratory enzymes are the two important steps for basidiocarp formation. PoWC1 and pofst genes were participate in the structural changes process. Besides this, the PoWC1 gene is also involved in the respiratory requirement, while the OLYA6 gene is the triggering point of fruiting. The findings of the present study could be utilized to understand the detailed mechanism associated with the basidiocarp formation and to cultivate mushrooms at a sustainable level.

321 Role of Antibiotics in Acute uncomplicated diverticulitis, A Systematic Review and Meta-Analysis

Introduction

Diverticular disease is a common health problem with a wide clinical spectrum. About 75% of the patients would have uncomplicated diverticulitis. Cornerstones of treatment are antibiotics, analgesia, and dietary advice. Recent evidence has shown that its treatment is controversial, questioning the use of antibiotics. Aim is to assess the role of antibiotics in the treatment of acute uncomplicated diverticulitis.

Method

This is a systematic review and Meta-analysis. Literature review of the available studies was conducted using search engines like Pubmed, Medline, Embase, Google Scholar, and Cochrane databases. Statistical analysis was conducted using RevMan5.4.

Results

Out of 1754 records 1324 were duplicates, 430 studies were screened. 395 were further excluded.35 full text articles were assessed and in the final review 10 studies were included. PRISMA guidelines were used. Pooled OR for recurrence = 0.92 (95% CI = 0.74 to 1.13). Pooled OR for Hospital stay= -0.66 (95% CI= -1.12 to -0.21). Pooled OR for complications = 1.06 (95% CI = 0.69 to 1.64). Pooled OR for treatment failure= 1.24 (95% CI = 0.90-1.69).

Conclusions

We conclude that from the available evidence antibiotics have no role in reducing recurrence, complications, treatment failure, and duration of hospital stay in acute uncomplicated diverticulitis.

Access to essential anticancer medicines for children and adolescents in Europe

BACKGROUND

Essential anticancer medicines are an indispensable component of multidisciplinary treatment of paediatric malignancies. A European Society for Medical Oncology (ESMO) study reported inequalities in the availability of anticancer medicines for adult solid tumours and provided a model for the present survey. The aim of this survey was to assess the accessibility of essential medicines used in paediatric cancer patients aged 0 to 18 years across Europe from 2016 to 2018.

METHODS

A list of medicines was drawn with input from the European Society for Paediatric Oncology (SIOP Europe) Clinical Research Council referring to the World Health Organization Model List of Essential Medicines for Children (WHO EMLc) 2017. A survey was sent to nominated national clinician and pharmacist rapporteurs and parent associations in up to 37 countries; answers were obtained from 34 countries.

RESULTS

The full survey list contained 68 medicines, including 24 on the WHO EMLc 2017. Health professionals reported that 35% of all medicines were prescribed off-label in at least one country and that 44% were always available in >90% of countries. Only 63% of the EMLc 2017 medicines were reported as always available. The main determinant of unavailability was shortages, reported for 72% of medicines in at least one country. Out-of-pocket costs were reported in eight countries. Twenty-seven percent of orally administered medicines were never available in child-friendly formulations. Parents detailed individual efforts and challenges of facilitating ingestion of oral medicines as prescribed. Inequalities in access to pain control during procedures were reported by parents across Europe.

CONCLUSIONS

Children and adolescents with cancer in Europe experience lack of access to essential medicines. Urgent actions are needed to address shortages, financial accessibility, availability of safe age-appropriate oral formulations, and pain management across Europe.

Biochemical Profiling and Cultivation of Medicinal Fungus Isaria cicadae (Ascomycetes) from India

Isaria cicadae is an entomopathogenic fungus possessing several therapeutic properties and has a potential role in traditional Chinese medicine. The present study was designed to describe the taxonomic details of a new isolate of I. cicadae collected from the Northern Himalayas of India and to study its vegetative and reproductive growth responses under in vitro conditions. Proximate composition, biochemical profiling, and radical scavenging activities were studied to establish the bioactivity of the isolate. Micromorphological characteristics of conidia and conidiophore formation were studied using scanning electron microscopy. The optimum temperature and pH for mycelial growth was 25°C and 7.0, respectively. Pinhead initiation was observed at day 10 after inoculation, but the fully developed, branched, and coral to club-shaped fruiting bodies could be observed after 30 days of inoculation. Proximate analysis indicated that carbohydrates are the major constituents (50.2%) of the fruit bodies, along with a lower quantity of protein (4.46%), crude fat (6.4%), and crude fiber (1.55%). Vitamin D content of I. cicadae was 3,605.84 IU/g. Radical scavenging activity based on the DPPT (1,1-diphenyl-2-picrylhydrazyl) assay was 21.2%. ABTS [2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid] and potassium ferricyanide reducing activity were quite high, at around 93% and 99.3%, respectively. The findings of this study provide insight into the biochemical constituents of I. cicadae and its cultivation practices for further exploitation of this mushroom at a larger scale.

Nutritional and Biochemical Characterization of Panus lecomtei Mushroom (Agaricomycetes) from India and Its Cultivation

Panus lecomtei is emerging as an edible mushroom found worldwide and particularly in the Northern Hemisphere. The mushroom contains a substantial amount of useful nutritional and medicinal compounds. In the present study, we have examined a specimen of P. lecomtei submitted to the ICAR-Directorate of Mushroom Research gene bank. The specimen was examined for taxonomical characters using classical and molecular tools. Attempts were made for cultivation of this mushroom under controlled conditions using sawdust-based substrate. The specimen was characterized by its purplish fruiting body having coarse, rigid, dense hairs on the cap, pubescent stipe, and abundant metuloids. Molecular identification through conserved ITS region was done and the sequence was deposited in NCBI GenBank under accession number MN332200. Nutritional profiling and biochemical analysis showed that the mushroom contained high carbohydrate but low fat contents. The mushroom showed the presence of phenolics, β-carotene, and lycopene. The analysis also showed substantial antioxidant properties in the mushroom. The findings presented herein point out that P. lecomtei can be used as a potential edible mushroom for diversification of mushroom production in India.

Substrate sterilization with thiophanate-methyl and its biodegradation to carbendazim in oyster mushroom (Pleurotus ostreatus var. florida)

Residue analysis to detect thiophanate-methyl and its primary metabolite (carbendazim) during oyster mushroom (Pleurotus ostreatus var. florida) cultivation was done for two consecutive years 2017 and 2018. Wheat straw substrate was chemically treated with different treatments of thiophate-methyl, viz, thiophanate-methyl 30 ppm + formalin 500 ppm (T1), thiophanate-methyl 40 ppm + formalin 500 ppm (T2), thiophanate-methyl 50 ppm + formalin 500 ppm (T3), thiophanate-methyl 60 ppm + formalin 500 ppm (T4), and formalin 500 ppm (T5 as control and recommended concentration), and utilized for cultivation of oyster mushroom. Treatments T3 and T4 exhibited significant difference in pH levels during both the trials. Minimum spawn run, pinhead formation, and fruit body formation time were recorded in treatments T3 and T4. Significantly higher biological efficiency (%) was recorded in treatments T3 and T4 as compared with all other treatments. No incidence of competitor molds was recorded in T3 and T4. Pesticide residue analysis for detection of thiophanate-methyl and its metabolite (carbendazim) was done in the fruit body produced in T3 and T4 treatments using liquid chromatography with tandem mass spectrometry method. No residue of thiophanate-methyl and carbendazim was detected at 50 ppm concentration of thiophanate-methyl during both the trials. However, in trial II, residue of carbendazim (5.39 μg/kg) was detected at 60 ppm. Based on the findings of the trials I and II, T3 (thiophanate-methyl 50 ppm + formalin 500 ppm) may be utilized for substrate sterilization for oyster mushroom cultivation and Pleurotus ostreatus var. florida could be recognized as microorganism which could play a role in degradation of thiophanate-methyl.

Genetic improvement in Pleurotus (oyster mushroom): a review

Pleurotus is an important genus comprising several edible species of great commercial significance. These species are grown all across the world. The production areas of Pleurotus mainly belong to the Asian part and are gaining wide popularity across the globe owing to their promising nutritional gains. The demand for improved strains with high productivity has also been rising. The genetic improvement in Pleurotus started with a simple selection technique, which later utilized hybridization (intraspecific, interspecific and intergeneric) and mutation breeding. The traits such as productivity, sporelessness and quality improvement are important objectives on which most of the works have been done so far. However, new generation approaches such as molecular breeding, genetic transformation and genome editing techniques also added pace to the present improvement process. Hitherto, seven species of Pleurotus have been sequenced and a sizable data has been generated that can be used in further breeding programs. This paper discusses and summarizes various research findings on genetic improvement of Pleurotus and gives an outlook for future breeding programs.

Phytochemical and Pharmacological Potential of Enhydra fluctuans Available in Bangladesh

Objectives: The possible phytochemical constituents, thrombolytic and membrane stabilizing activities of the crude ethanolic extract of Enhydra fluctuans (CE) were investigated along with the antimicrobial, antioxidant and cytotoxic potentials of its petroleum ether (PESF), carbon tetrachloride (CTCSF), chloroform (CSF) and aqueous (AQSF) soluble fractions. Materials & Methods: The coarse leaf powder was extracted at room temperature with ethanol. Solvent-solvent partitioning was done to obtain the four soluble fractions. Anticoagulant potential was determined by the in vitro thrombolytic model, membrane stabilization method was used to assess in vitro anti-inflammatory activity, the disc diffusion method was used for anti-microbial screening, antioxidant potential was determined by 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging method and brine shrimp lethality bioassay method was used for cytotoxic activity determination. Results: Chemical screening of the crude extract evidenced the presence of alkaloids, saponins, tannins, flavonoids, reducing sugars and gums. It showed significant clot lysis property of 46.91%. It also significantly inhibited heat and hypotonic solution induced lysis of the human red blood cell membrane with values of 71.80% and 47.60%, respectively. CTCSF and PESF showed mild antimicrobial activity. AQSF showed most prominent antioxidant activity with IC50 value of 12.27 µg/mL. CTCSF showed LC50 value of 0.84 µg/mL, with most potent cytotoxic activity. Conclusion: Significant thrombolytic, membrane stabilizing, antioxidant and in vitro cytotoxic activities of the ethanolic plant extract were observed in this study. In vivo activities and isolation of active compound(s) from this extract are yet to be investigated.

Mushroom Crop in Agricultural Waste Cleanup

The environment is a life support system and it significantly influences the living organisms and their genes. Decomposers and microorganisms play a major role in maintaining the sustainability of the environment by converting toxic products into a mineralized form and maintaining the nutrient cycle. It is estimated that 62% of the 22 million tons of surplus rice straw is burnt in the field every year and contributes significantly to the black carbon emission from biomass burning. This alarming situation calls for a sustainable approach in crop residue management. Mushroom cultivation offers one such approach. Mushroom farms can act as disposal sites of agriculture residue and at the same time produce quality protein to meet the increasing protein demand. The macro fungi can play a major role in synthesis of non-toxic metal nano-particles from their salts and degradation of diverse crop residues through various enzymes present in them such as ligninases, cellulases, and laccases. Their role also extends to degrading the pesticides and persisting chemicals. This chapter explains the recent advances in mushrooms for effective crop residue utilization.

HIV-infected patients' beliefs about their chronic co-treatments in comparison with their combined antiretroviral therapy

Objectives

Thanks to the success of combination antiretroviral therapy (cART), HIV‐infected patients can have almost a normal life expectancy. This has resulted in an aging HIV‐infected population with other chronic comorbidities such as cardiovascular diseases, osteoporosis, and depression. Our hypothesis is that patients' perceptions of and attitudes towards their cART, which is perceived as crucial to their survival, differ from their beliefs about their co‐treatments, and this may have an impact on their medication adherence.

Methods

We used the French version of the Beliefs about Medicine Questionnaire (BMQ‐f) to measure the perceptions of patients about their co‐treatments and the Beliefs about Medicine Questionnaire for Highly Active Antiretroviral Therapy (BMQ‐HAART) to measure their beliefs about their cART in a representative sample (n = 150) of patients enrolled in the Swiss HIV Cohort Study (SHCS) and followed at the Infectious Disease Service at the University Hospital in Lausanne, Switzerland. The survey was administered to all eligible patients by the order of their scheduled appointments at the end of their medical visit. The BMQ comprises two subscores: Specific‐Necessity (5 identical items in BMQ‐f and BMQ‐HAART) and Specific‐Concerns (also 5 identical items in BMQ‐f and BMQ‐HAART). The subscores were standardized by dividing the score scale by the number of questions in the scale, resulting in a range of responses between 1 (low) and 5 (high). Self‐reported medication adherence was measured using the SHCS Adherence Questionnaire (SHCS‐AQ). Adherence was defined as not missing any dose or missing one dose of the treatment in the past 4 weeks. Sociodemographic variables were retrieved by reviewing the SHCS database.

Results

A response rate of 73% (109 of 150) was achieved. A total of 105 patients were included in the analysis: their median age was 56 [interquartile range (IQR) 51, 63] years and 74 were male (70%). Eighty‐seven patients (83%) were adherent to cART and 75 (71%) were adherent to their co‐treatments (P = 0.0001). The standardized mean responses for the BMQ Specific‐Necessity subscores were 4.46 [standard deviation (SD): 0.58] and 2.86 (SD: 1.02) for cART and co‐treatments, respectively (P < 0.0001). For Specific‐Concerns, the standardized mean responses were 2.9 (SD: 1.02) for cART and 4.09 (SD: 1.02) (P < 0.0001) for co‐treatments. cART and co‐treatment concerns increased as the number of co‐treatments increased (P = 0.03 and P < 0.0001, respectively).

Conclusions

Patients had higher Necessity and lower Concerns scores for their cART in comparison with their co‐treatments. A higher percentage of patients reported being adherent to cART compared with the co‐treatments that they reported they were most likely to miss. Further research using a bigger sample size and more objective measures of adherence is needed to explore the association between adherence and patients' perceptions.

Sensory, nutritional and quality attributes of sponge cake supplemented with mushroom (agaricus bisporus) powder

Purpose

The purpose of this paper was to evaluate the quality characteristics of white button mushroom powder enrichment in sponge cake. The developed product can be a promising inclusion in the convenience functional foods and would serve the purpose of improving nutritional status of consumers.

Design/methodology/approach

Cakes containing graded levels of agaricus bisporus (white button mushroom) powder were prepared by replacing wheat flour with 10, 20, 30, 40 and 50 per cent mushroom powder. The effect of mushroom powder supplementation on physical, nutritive and sensory quality of the cakes was evaluated and analyzed statistically using Agres-Agdata software.

Findings

Batter density and specific volume of cake samples decreased with increasing levels of mushroom powder in the formulation, which is contrary to the knowledge that they are inversely proportional. For 20 per cent enrichment, batter density and specific volume decreased by 8.23 and 5.79 per cent, respectively. There was no significant difference in individual organoleptic attributes of cake samples up to a level of 20 per cent fortification of mushroom powder, with significant nutrient enrichment (p > 0.05).

Originality/value

Replacing flour in cakes has been tried with many protein-rich ingredients to improve the nutritional quality of cake although with limiting success when it comes to sensorial acceptability. Mushroom powder was incorporated in the formulation to enrich sponge cakes. The processing technology will also reduce post-harvest losses in mushrooms and improve the nutritional status of society.

Study of microbial growth on silicone tubes after transcanalicular laser-assisted dacryocystorhinostomy and correlation with patency

INTRODUCTION

Intubation in primary transcanalicular laser assisted dacryocystorhinostomy (TCLADCR) is performed to increase the success rates. However, the associated inflammation and infection can have adverse effects.

OBJECTIVE

To study the microbial infection and drug susceptibility of extubated silicone tubes and final anatomical patency in patients undergoing TCLADCR.

MATERIALS AND METHODS

A non-randomised prospective interventional study was conducted in a tertiary care eye centre. The study included twenty consecutive adult patients with primary nasolacrimal duct obstruction. They underwent TCLADCR with bicanalicular silicone intubation. The stents were removed at 2 months and subjected to culture sensitivity, followed by administration of appropriate antimicrobial agents. Main outcome measures studied were the microbial spectrum on the cultured tubes, their sensitivity profile and its correlation with final anatomical patency.

RESULTS

A positive culture was obtained in 100% cases, comprising of normal commensals and pathogenic organisms. Of the total 24 isolates, 16 (66.6%) Gram positive bacteria (75% Staphylococcus aureus) and 8 (33.3%) Gram negative bacteria (commonest E.coli) were found, with 4 tubes having more than one isolate. No fungal growth was seen. Ninety percent success rate was achieved at one year following appropriate antimicrobial therapy except in 2 patients with gram negative isolates who had failed to take the prescribed antibiotics following sensitivity reports. There was no correlation between multiple infections and success rate. However, by using the Fisher exact test, a positive correlation was obtained between appropriate antibiotic treatment and the final anatomical patency (p less than 0.05).

CONCLUSION

Silicone intubation predisposes to microbial growth, which if neglected, can lead to failure of TCLADCR.

Control of discrete time systems based on recurrent Super-Twisting-like algorithm

Most of the research in sliding mode theory has been carried out to in continuous time to solve the estimation and control problems. However, in discrete time, the results in high order sliding modes have been less developed. In this paper, a discrete time super-twisting-like algorithm (DSTA) was proposed to solve the problems of control and state estimation. The stability proof was developed in terms of the discrete time Lyapunov approach and the linear matrix inequalities theory. The system trajectories were ultimately bounded inside a small region dependent on the sampling period. Simulation results tested the DSTA. The DSTA was applied as a controller for a Furuta pendulum and for a DC motor supplied by a DSTA signal differentiator.

Efficacy of sutureless and glue free limbal conjunctival autograft for primary pterygium surgery

INTRODUCTION

There are numerous adjunctive measures described to reduce the recurrence rates after pterygium excision.

OBJECTIVE

To study the efficacy and complications of sutureless and glue free limbal conjunctival autograft for the management of primary pterygium over a period of one year.

MATERIALS AND METHODS

A prospective interventional case series was carried out in 40 consecutive eyes with primary nasal pterygium requiring surgical excision. Pterygium excision with limbal conjunctival autografting without using glue or sutures was performed in all the patients followed by bandaging for 48 hours. The patients were followed up post operatively on 2nd day, 1 week, 6 weeks, 6 months and 12 months. They were examined for haemorrhage, wound gape, graft shrinkage, chemosis, graft dehiscence, recurrence or any other complication.

RESULTS

The mean age of the patients was 42.8 years (range 23-61), 75% of which were males. Total graft dehiscence occurred in 2 eyes (5%), graft retraction in 3 eyes (7.5%) and recurrence was seen in 1 eye (2.5%). At 6 weeks postoperatively, the gain in uncorrected visual acuity ranged from 0.18 to 0.5 log MAR in 7 eyes. No other complication was noted.

CONCLUSIONS

Sutureless and glue free limbal conjunctival autografting following pterygium excision is a safe, effective and economical option for the management of primary pterygium.

Root endophyte Piriformospora indica DSM 11827 alters plant morphology, enhances biomass and antioxidant activity of medicinal plant Bacopa monniera

Unorganized collections and over exploitation of naturally occurring medicinal plant Bacopa monniera is leading to rapid depletion of germplasm and is posing a great threat to its survival in natural habitats. The species has already been listed in the list of highly threatened plants of India. This calls for micropropagation based multiplication of potential accessions and understanding of their mycorrhizal associations for obtaining plants with enhanced secondary metabolite contents. The co-cultivation of B. monniera with axenically cultivated root endophyte Piriformospora indica resulted in growth promotion, increase in bacoside content, antioxidant activity and nuclear hypertrophy of this medicinal plant.

The root endophyte fungus Piriformospora indica leads to early flowering, higher biomass and altered secondary metabolites of the medicinal plant, Coleus forskohlii

This study was undertaken to investigate the influence of plant probiotic fungus Piriformospora indica on the medicinal plant C. forskohlii. Interaction of the C. forskohlii with the root endophyte P. indica under field conditions, results in an overall increase in aerial biomass, chlorophyll contents and phosphorus acquisition. The fungus also promoted inflorescence development, consequently the amount of p-cymene in the inflorescence increased. Growth of the root thickness was reduced in P. indica treated plants as they became fibrous, but developed more lateral roots. Because of the smaller root biomass, the content of forskolin was decreased. The symbiotic interaction of C. forskohlii with P. indica under field conditions promoted biomass production of the aerial parts of the plant including flower development. The plant aerial parts are important source of metabolites for medicinal application. Therefore we suggest that the use of the root endophyte fungus P. indica in sustainable agriculture will enhance the medicinally important chemical production.

Seroprevalence of tick-borne diseases among cattle in the Sudan

This study was carried out to determine the prevalence of Theileria annulata, Theileria mutans, Babesia bigemina, and Anaplasma marginale antibodies among cattle in the Sudan. A total of 600 serum samples were collected from indigenous (zebu) and crossbred cattle (zebu x Friesian) of both sex and different age groups. Indirect enzyme-linked immunosorbent assay was used to assess antibodies against tick-borne diseases in apparently healthy cattle. The overall prevalence rates of T. annulata, T. mutans, B. bigemina, and A. marginale antibodies were found to be 30.8%, 6.1%, 10.7%, and 38.9%, respectively. The highest seroprevalence of T. annulata was reported in Atbara and El Damer, Northern Sudan. There were no significant associations for the seroprevalence of all tick-borne diseases reported among different age groups. Although there were no significant differences between the two breeds of cattle examined for T. annulata, T. mutans, and B. bigemina antibodies, there was a significant difference for prevalence of antibodies against A. marginale, with highest percentages of antibodies in indigenous cattle. Six different combinations of mixed infection were detected. This is the first report in which antibodies against A. marginale among cattle in Northern Sudan is reported. The findings imply that antibodies to tick-borne infections are widely distributed in the region. The need for further investigations using more advanced techniques is recommended.

Evaluation of Og4C3 antigen ELISA as a tool for detection of bancroftian filariasis under lymphatic filariasis elimination programme

Diagnosis of Lymphatic Filariasis by microscopic examination of thick blood films (TBF) collected between 8.30 pm to 12 midnight, though highly specific is operationally problematic. We evaluated the TropBio Og4C3 serum ELISA as a tool for detection of W. bancrofti microfilaria carriers using Dried Blood Spots (DBS). The study was carried out in two parts (i) to test the sensitivity and specificity of the ELISA test for detection of circulating filarial antigen (CFA) in microfilaria (Mf) carriers vis-à-vis the conventional thick blood film (TBF) microscopy and its persistence in different categories of individuals during the course of disease viz., Endemic normals (n=51), microfilaria (Mf) carriers (n=27), acute cases (n=27), chronic cases (n=50) and a control group of non-endemic normals (n=48) using sera samples and ii) to study the utility of finger prick Dried Blood Spots (DBS) collected on filter paper for detection of Mf carriers and its comparison with another antigen detection assay, the Immunochromatographic test (ICT). Considering the non-endemic normals and microfilaria carriers, the ELISA test was found to have 100% sensitivity and 94.12% specificity for detection of Mf carriers in sera samples. The CFA was absent in majority of the subjects tested under other categories with a positivity of 7.8% among endemic normals, 11.12% among acute cases, 7.84% among chronic cases and 6.25% among nonendemic normals. Comparison of finger prick DBS and sera samples by ELISA vis-à-vis the ICT, carried out on Mf carriers (n=91) and endemic normals (n=97), showed a positivity of 88 (96.7%) in DBS as against 86 (94.5%) in sera samples and 88 (96.7%) by ICT, amongst Mf carriers, with a statistically significant correlation in antigen units between sera and DBS samples (r = 0.959, p = 0.000) amongst the microfilaria carriers. Out of 97 endemic normals, 19 (19.6%) sera and 17 (17.5%) DBS samples tested positive by ELISA while as 12(12.4%) tested positive by ICT, again with a statistically significant correlation between the antigen units in sera and DBS samples (r = 0.942, p = 0.000). DBS prepared from 25 microl of blood were found to be as sensitive as 50 microl for antigen detection. Antigen positivity detected from DBS collected during day and night from known microfilaria carriers (n=27) showed a statistically insignificant difference (p = 0.125) and a significant correlation in antigen units (r = 0.820 and p = 0.013). In view of the comparable results of ELISA, ICT and TBF microscopy, it is concluded that the TropBio Og4C3 ELISA using finger prick DBS can be used as an alternate to TBF microscopy for detection of bancroftian Filariasis under the LFE programme.

Traumatic diaphragmatic herniation presenting as a delayed tension faecopneumothorax

This article reports an unusual case of delayed presentation of a tension faecopneumothorax after traumatic injury to the diaphragm 5 years previously. Three important clinical lessons are highlighted: (a) for suspected tension pneumothorax, if a considerable quantity of serous fluid is drained in addition to air, a communication with the peritoneal cavity should be considered; (b) spontaneous tension pneumothorax is an extremely rare condition and other causes should be kept in mind; and (c) in the presence of a tension pneumothorax and diaphragmatic hernia, the contents of the visceral sac may be completely reduced and the hernia may be masked.

An outbreak of dengue fever in Veerannapet village, Cherial Mandal, of Warangal district, Andhra Pradesh

An epidemiological and entomological investigation was carried out in Veerannapet village, Cherial Mandal of Warangal district, Andhra Pradesh. The study showed that all age groups and both the sexes were affected with the disease. Fever and bodyache was the first presenting feature, which was self-limiting and lasted for 4-5 days. Of the 19 Serum Samples tested, 17 showed high titre to Dengue antigen with 10 showing diagnostic titre. Five samples were positive for IgM antibodies to dengue virus. Larval surveys indicates high Breteau index (30.40%), House index (23.20%) and Container index (9.17%). The clinico-epidemiological and entomological investigation indicates present episode of fever outbreak is due to dengue fever. Strengthening and intensification of surveillance along with educating the community is recommended for prevention of outbreak.

Mushroom cryopreservation and its effect on survival, yield and genetic stability

Mycelial stock cultures of Agaricus bisporus, A. Bitorquis, Pleurotus flabellatus, P. Sajor-caju, P. Ostreatus, P. Sapidus, Auricularia polytricha, Lentinula edodes, Morchella esculenta and Volvariella volvacea were maintained by frequent subculturing at an interval of two months and separately as wheat grain spawn in liquid nitrogen with 15 percent glycerol. Preservation of mushroom stock cultures as wheat grain spawn under liquid nitrogen proved to be the better method of maintenance. The percent recoveries of stored samples were unchanged from the first recovery after six months to the last recovery after 42 months in nine out of 11 stock cultures preserved under liquid nitrogen. However, a marginal decline in survival of 10 % was recorded in Auricularia polytricha and Volvariella volvacea. Yields before preservation of mushroom stock cultures and after 30 months of preservation exhibited static biological efficiency and fruitbody weight. The comparison of Random Amplified Polymorphic DNA (RAPD) and Internal Transcribed Spacers (ITS) PCR amplified products did not exhibit DNA fragment variation in banding patterns at the intraspecific level during preservation of stock cultures by either method. The modified cryopreservation protocol and experimental demonstration of genetic stability of stock cultures reported here validate the use of mushroom cryopreservation techniques and supports studies on genetic stability of preserved biological materials.

A differential study of breast cancer patients in Punjab, Pakistan

OBJECTIVE

To determine the comparative pattern of distribution of four stages of breast cancer in 2 different hospitals in Lahore.

METHODS

For all the variables under study test-statistic t has been used for stagewise comparisons between the Institute of Nuclear Medicine and Oncology (INMOL) and Shaukat Khanum Memorial Cancer Hospital (SKMCH) whereas the four stages of the disease were compared by using test-statistic F.

RESULTS

The study is based on 1171 patients (672 from INMOL and 499 from SKMCH). This paper is an attempt to find out the pattern for the spread of breast cancer among its four stages and its comparative study between the two hospitals, at stage level. It unveils the important fact of late presentation of breast cancer (25% of INMOL and 36% at SKMCH) compared in 10% or less in international literature (18). No impact of the variables under study was observed (P>0.05) on the stage of the disease.

CONCLUSION

Most of the cases (71% in INMOL and 63% (SKMCH) present at stage III and IV of breast cancer therefore it is necessary that attention should be made to increase the awareness about the need and benefits of early detection of breast cancer.

Breeding habitats and larval indices of Aedes aegypti (L) in residential areas of Rajahmundry town, Andhra Pradesh

Entomological studies on relative prevalence and distribution of adults and immatures of Aedes aegypti were conducted in Rajahmundry town of Andhra Pradesh from December 1998 to November 1999. Adults and immature stages of Aedes aegypti were found in all the 22 localities viz; posh area (8), mixed area (8) and slum area (6) of the town. Larval indices were found to be higher in slum areas as compared to mixed or posh areas of the town. However, the larval habitats were observed to be similar in all localities. The larval indices were highest during monsoon and post-monsoon months. The breeding preference ratio (BPR) was highest for cement tubs followed by discarded tyres and barrels. The high larval indices of Aedes aegypti in these areas warrant intensification of vector surveillance activities along with source reduction and health education.

Observation of the transverse optical plasmon in SmLa0.8Sr0.2CuO4-delta

We present microwave and infrared measurements on SmLa0.8Sr0.2CuO4-delta, which are direct evidence for the existence of a transverse optical plasma mode, observed as a peak in the c-axis optical conductivity. This mode appears as a consequence of the existence of two different intrinsic Josephson couplings between the CuO2 layers, one with a Sm2O2 block layer, and the other one with a (La,Sr)2O2-delta block layer. From the frequencies and the intensities of the collective modes we determine the value of the compressibility of the two dimensional electron fluid in the copper oxygen planes.

Epidemiological observations on malaria in some parts of Darrang District, Assam

A study on malaria conducted in tribal villages of Darrang district, Assam during April 1994 to March 1995 revealed that the malaria incidence due to Plasmodium falciparum was considerably high. Slide positivity rate (SPR) ranged between 2.3 to 45.67 per cent with transmission from May to October. P. falciparum was the dominant species (91.7 per cent) followed by P. vivax (7.25 per cent) and mixed infection (Pv + Pf = 1.05 per cent). Malaria cases were recorded throughout the year in all the age groups including infants, however, age groups between 0-1 and 21-30 years were more affected. Among 17 anophelines collected, Anopheles vagus, An. jamesii, An. crawfordi and An. minimus were the most abundant species. Known vectors of malaria like An. annularis, An. culicifacies, An. minimus, An. philippinensis and An. varuna were detected. Perennial transmission of malaria was attributed to low socio-economic conditions, poor surveillance and inadequate intervention measures.

Clinical, virological and histopathological features: long-term follow-up in patients with chronic hepatitis C co-infected with S. mansoni

BACKGROUND/AIMS

Infection with Schistosoma mansoni is endemic in Egypt leading to hepatic schistosomiasis and eventually portal hypertension. The prevalence of antibodies against hepatitis virus C among Egyptians is 14-51%. The aim of the present study was to investigate the influence of schistosomiasis on chronic hepatitis C with respect to the natural course of the disease, immunology, virology and histology.

PATIENTS AND METHODS

One hundred and twenty-six Egyptian patients classified into three groups: group A: chronic hepatitis C (n=33); group B: chronic schistosomiasis (n=30) and group C: chronic hepatitis C and chronic schistosomiasis (n=63) were enrolled and prospectively followed for 62.7 +/- 22 months. Patients infected with other hepatic viruses and/or parasites were excluded. Detailed history, clinical examination, CD4+ and CD8+ lymphocyte counts in blood, hematological and blood chemical values, abdominal ultrasonography, upper endoscopy, HCV RNA titer by RT/PCR, genotype and histological activity index in the liver biopsy were determined.

RESULTS

Thirty patients (48%) with HCV and schistosomiasis had liver cirrhosis and Child-Pugh class C vs. five (15%) in HCV patients and none in the schistosomal group. HCV RNA levels ranged between 0.07 and 13 x 10(5) copies/ml in group A, and between 1 and 25 x 10(5) copies/ml in group C. HCV genotype 4 was detected in 58 patients with co-infection (92%) and 21 patients with HCV alone (64%). Patients with coinfection showed higher grading and staging scores in their liver biopsies. Hepatocellular carcinoma was detected only in patients with coinfection. During follow-up, the mortality rate was 12%, 3% and 48% in group A, B and C, respectively.

CONCLUSIONS

Patients with concomitant HCV and schistosomiasis infection were characterized by more advanced liver disease, higher HCV RNA titers, predominance of HCV genotype 4, higher histologic activity, higher incidence of cirrhosis and hepatocellular carcinoma as well as a much higher mortality rate.

Clinical, virological and histopathological features: long-term follow-up in patients with chronic hepatitis C co-infected with S. mansoni

BACKGROUND/AIMS

Infection with Schistosoma mansoni is endemic in Egypt leading to hepatic schistosomiasis and eventually portal hypertension. The prevalence of antibodies against hepatitis virus C among Egyptians is 14-51%. The aim of the present study was to investigate the influence of schistosomiasis on chronic hepatitis C with respect to the natural course of the disease, immunology, virology and histology.

PATIENTS AND METHODS

One hundred and twenty-six Egyptian patients classified into three groups: group A: chronic hepatitis C (n=33); group B: chronic schistosomiasis (n=30) and group C: chronic hepatitis C and chronic schistosomiasis (n=63) were enrolled and prospectively followed for 62.7 +/- 22 months. Patients infected with other hepatic viruses and/or parasites were excluded. Detailed history, clinical examination, CD4+ and CD8+ lymphocyte counts in blood, hematological and blood chemical values, abdominal ultrasonography, upper endoscopy, HCV RNA titer by RT/PCR, genotype and histological activity index in the liver biopsy were determined.

RESULTS

Thirty patients (48%) with HCV and schistosomiasis had liver cirrhosis and Child-Pugh class C vs. five (15%) in HCV patients and none in the schistosomal group. HCV RNA levels ranged between 0.07 and 13 x 10(5) copies/ml in group A, and between 1 and 25 x 10(5) copies/ml in group C. HCV genotype 4 was detected in 58 patients with co-infection (92%) and 21 patients with HCV alone (64%). Patients with coinfection showed higher grading and staging scores in their liver biopsies. Hepatocellular carcinoma was detected only in patients with coinfection. During follow-up, the mortality rate was 12%, 3% and 48% in group A, B and C, respectively.

CONCLUSIONS

Patients with concomitant HCV and schistosomiasis infection were characterized by more advanced liver disease, higher HCV RNA titers, predominance of HCV genotype 4, higher histologic activity, higher incidence of cirrhosis and hepatocellular carcinoma as well as a much higher mortality rate.

Antimicrobial activity spectrum, cDNA cloning, and mRNA expression of a newly isolated member of the cecropin family from the mosquito vector Aedes aegypti

An antimicrobial peptide belonging to the cecropin family was isolated from the hemolymph of bacteria-challenged adult Aedes aegypti. This new peptide, named cecropin A, was purified to homogeneity and fully characterized after cDNA cloning. The 34-residue A. aegypti cecropin A is different from the majority of reported insect cecropins in that it is devoid of a tryptophan residue and C-terminal amidation. The importance of these two structural features on the activity spectrum was investigated using a chemically synthesized peptide. A comparison of the antimicrobial activity spectrum of A. aegypti and Drosophila cecropin A showed a lower activity for the mosquito molecule. A. aegypti cecropin mRNA expression was not detected by Northern blot or reverse transcription-polymerase chain reaction analysis in any immature stage of the mosquito, nor in naïve adults, but it was observed in challenged adults 6 h after bacteria inoculation, and it continued over 7-10 days.

Mosquito-Plasmodium interactions in response to immune activation of the vector

During the development of Plasmodium sp. within the mosquito midgut, the parasite undergoes a series of developmental changes. The elongated ookinete migrates through the layers of the midgut where it forms the oocyst under the basal lamina. We demonstrate here that if Aedes aegypti or Anopheles gambiae, normally susceptible to Plasmodium gallinaceum and P. berghei, respectively, are immune activated by the injection of bacteria into the hemocoel, and subsequently are fed on an infectious bloodmeal, there is a significant reduction in the prevalence and mean intensity of infection of oocysts on the midgut. Only those mosquitoes immune activated prior to, or immediately after, parasite ingestion exhibit this reduction in parasite development. Mosquitoes immune activated 2-5 days after bloodfeeding show no differences in parasite burdens compared with naive controls. Northern analyses reveal that transcriptional activity for mosquito defensins is not detected in the whole bodies of Ae. aegypti from 4 h to 10 days after ingesting P. gallinaceum, suggesting that parasite ingestion, passage from the food bolus through the midgut, oocyst formation, and subsequent release of sporozoites into the hemolymph do not induce the production of defensin. However, reverse transcriptase-PCR of RNA isolated solely from the midguts of Ae. aegypti indicates that transcription of mosquito defensins occurs in the midguts of naive mosquitoes and those ingesting an infectious or noninfectious bloodmeal. Bacteria-challenged Ae. aegypti showed high levels of mature defensin in the hemolymph that correlate with a lower prevalence and mean intensity of infection with oocysts. Because few oocysts were found on the midgut of immune-activated mosquitoes, the data suggest that some factor, induced by bacterial challenge, kills the parasite at a preoocyst stage.

Leprosy affects facial nerves at the main trunk: neurolysis can possibly avoid transfer procedures

The predilective sites of lesions in leprous peripheral nerves are well established, and their surgical decompression is common practice when sensorimotor disorders persist after medication. By contrast, the precise localization of leprous facial neuropathy still remains unclear, and musculofascial transfers have been the only type of surgical treatment. The goal of this study was to clarify where leprosy affects facial nerves and to determine whether neurolysis might suffice to restore facial function. In five Indian and two Egyptian patients suffering from leprous facial neuritis, the nerves were stimulated transcranially at the brainstem to evoke efferent motor nerve action potentials, which were recorded from the exposed nerves. Lesions were detected at the main trunk proximally from the first bifurcation in all cases. Epineuriotomy revealed fibrosis of the interfascicular epineurium in all instances, as an indication for interfascicular neurolysis. One patient was able to close his eye and showed a better smile soon after surgery. After 16 and 21 months, respectively, one patient had improved distinctly, two patients slightly, two patients showing no progress, and two patients were lost to follow-up. It is concluded that (1) leprous facial neuropathy is located at the main trunk close to the first bifurcation and not exclusively at the peripheral zygomatic branches, (2) microsurgical neurolysis can be considered in leprous facial neuropathy before transfer procedures as long as voluntary or spontaneous activity is present in the affected muscles, and (3) intraoperative transcranial electrical stimulation is an effective means of localizing the site and proximal extent of leprous facial neuropathy.