Search or add a thesis

Advanced Search (Beta)
Home > Epidemiology of Principal Viral Respirtaory Pathogens in Pakistani Children and Molecular Characterization of Influenza A/H3n2 and Respiratory Syncytial Viruses

Epidemiology of Principal Viral Respirtaory Pathogens in Pakistani Children and Molecular Characterization of Influenza A/H3n2 and Respiratory Syncytial Viruses

Thesis Info

Access Option

External Link

Author

Bashir, Uzma

Program

PhD

Institute

National University of Sciences & Technology

City

Islamabad

Province

Islamabad

Country

Pakistan

Thesis Completing Year

2017

Thesis Completion Status

Completed

Subject

Virology & Immunology

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/9980/1/Uzma_Bashir_Virology_%26_Immunology_HSR_2017_NUST_25.05.2017.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726080344

Similar


21 ABSTRACTBSTRACTBSTRACTBSTRACTBSTRACTBSTRACTBSTRACT Acute respiratory infections (ARI) are associated with high morbidity and mortality rates at the global level. Approximately 20% of the deaths attributable to pneumonia globally occur in Pakistan with nearly one half the infections among children younger than 5 years of age. The objectives of this study were to define the molecular epidemiology of respiratory viruses in Pakistani children and to identify viral genotypes causing respiratory infections. In this study, we analyzed 1941 respiratory samples collected over three winter seasons and tested for common respiratory pathogens using real time PCR. We found 76% prevalence rate for viral pathogens with Influenza and RSV predominant among 0.01-6 and 12-24 months age groups respectively. Fever and cough were identified as significant clinical parameters along with malnutrition and maternal breastfeeding. Furthermore, phylogenetic analysis of representative Influenza A/H3N2 viruses showed that recent viruses belonged to subgroup 3C.3 and carried important amino acid substitutions in the H3 hemagglutinin, while no substitutions attributable to neuraminidase resistance were detected. We genotyped the Respiratory Syncytial viruses subtypes and analyzed the two surface glycoproteins G and F of over100 isolates. All RSV-A strains carried 297 amino acids long G protein and clustered in the NA1/GA2 genotype. We also reported a novel RSV B genotype BA-13 and two other genotype variants (BA-9 and BA-10). We analysed the fusion protein F in RSV A isolates at the binding sites for the monoclonal antibodies Palivizumab and Motavizumab specifically and found that the N276S substitution in over 90% of RSVA and all RSVB viruses. This work highlights the need for respiratory disease surveillance as it will support the development of appropriate public health surveillance programs to inform health planning.
Loading...
Loading...

Similar Books

Loading...

Similar Chapters

Loading...

Similar News

Loading...

Similar Articles

Loading...

Similar Article Headings

Loading...

غزل

بے رنگ ریگ زار میں جینا پڑا ھمیں

دشمن کے اختیار میں جینا پڑا ھمیں

تاریکیوں میں ایک کرن بھی نہ مل سکی

لگتا ھے جیسے غار میں جینا پڑا ھمیں

جیون کی الجھنوں کونہ سلجھا سکے کبھی

اک عمر خلفشار میں جینا پڑا ھمیں

جب یہ کھلا فریب ھے یہ ساری کائنات

مرنے کے انتظار میں جینا پڑا ھمیں

اس کے لئے شکست بھی ھم نے قبول کی

اک روز اپنی ھار میں جینا پڑا ھمیں

اڑتی رھی ھے دھول دلوں سے نگاہ تک

تنہا اسی غبار میں جینا پڑا ھمیں

ھم نے سلگ سلگ کے گذاری ھے زندگی

اک آگ کے حصار میں جینا پڑا ھمیں

اک پل جہاں ٹھہرنا گوارا نہ تھا نوید

برسوں اسی دیار میں جینا پڑا ھمیں

لفظ ادب كے معنوی ارتقاء كی تاریخ

The word (Adab) , contrary to its present equitant in English language (literature) , has an interesting background and exciting history. This word went through many developments in its meaning and senses during different periods of the literary history of Arabic literature. Linguistics took keen interest in each and every change and development came into its meaning. They thoroughly studied this word, throughout the literary history of Arabic literature, and tried to link between its early root meaning "(giving a banquet) or (feast) ", and its present meaning (literature) . This article is aimed to study the evolution and development came in the meanings and senses of the word (Adab) from the very first stage of Arabic literature i. e. Pre-lslamic Period till the modern period.

Studies on the Standardization of Rose Water and Assessment of its Uses/ Role in Herbal Medicine.

The plant-based medicament isan essential therapeutic weapon to fight against the various human and animal diseases. The present study is based on the rose water obtained from the petals of Rosa damascena Mill available in Pakistan and to correlate its usage and application in personal care preparations. In this study twelve samples of rose water were examined in which eleven samples were collected from the local market / provided by the manufacturer on request, and one hydro distilled sample was prepared on lab scale. The thesis has alienated into five parts. The first part has two portions. Part I (a) consists of the brief introduction related to the rose water botanical source, the region of the world where rose water distilled, chemical constituents, historical, traditional and medicinal importance. In the firstpart, the value of standardization also highlighted through the introduction of standardization, in the end of the first part, the objectives of the present study is discussed. Part I (b) deals with the literature review of Rosa damascena. Rose plant widely disseminated in the plant kingdom and currently consumed bya significant amount as a therapeutic agent. Literature data suggested that rose flowers associated with various biological and pharmacological activities, including anti-cancer, cardiovascular, analgesic, anti-inflammatory, anti-oxidant, anti-microbial and helpful in skin care. Part II describes the experimental work of the present study. Part III shows the results of studies on rose water samples and their physicochemical study, estimation of their volatile components through HS-GC-MS, determination of functional groups through FTIR, toxicity study, in-vitro antioxidant activity study against standard ascorbic acid, invitro anti-inflammatory activities against standard diclofenac sodium, in-vitro sun protection factor determination, anti-microbial activity, bacterial contamination study, cosmaceutical effect on topical application on skin to observe the hydration glow and oil content. Two formulations prepared one is rose water-based cream, study its antiinflammatory and anti-oxidant effects against standard drugs, and the other is rose water based cough syrup and performed its antitussive effect on rats. xxvi In the present study, the pH of rose water is within the range from 4-6 which is an acceptable and non-skin irritating pH value and suitable for topical application. The phytochemical study indicates the presence of flavonoids, tannins, saponins, triterpenoids and fixed oil, whereas the volatile components which have detected through HS-GC-MS are phenyl ethyl alcohol, citronellol, pentadecane, heptadecanol, octadecanol, tetracosane, decane and nonane. FT-IR estimation indicates the presence of carbohydrates, an amine group, a hydroxyl group, alkane, alcohol, ester, ether and carboxylic anhydrides. Toxicity study of rose water indicated that it is non-toxic and LC 50 is more than 3500µg/ml. Invitro antioxidant activity of three samples 12, 9 and 8 shown marked % reduction. The reducing power of sample# 12 recorded as highest 841.66, followed by sample #9 (533.33) and then sample #8 (458.33) against 50µg/ml standard ascorbic acid. The invitro anti-inflammatory activity of rose water studied on four different concentration that is 3,5 7 and 10 ml, and it observed that 10 ml of rose water shown protein inhibition activity equivalent to 100µg/ml of standard diclofenac sodium. Rose water protects from the UV radiation. The sun protecting factor of rose water samples ranges from 3.956 to 0.218. Results of anti-microbial activity indicated that all the test organisms had not shown dose-related sensitivity and thus no zone of inhibition was observed by well diffusion method. The bacterial contamination indicates that rose water samples contain both gram positive and gram negative bacilli. The skin hydration, as well as the glowing effect, significantly increased after the application of rose water. Two formulations are designed based on rose water one is rose water-based cream, and other is rose water based cough syrup. Results of in-vitro anti-inflammatory activity by protein (egg albumin) denaturation of cream formulation throughout the concentration range of 50-1000 µg/ml. For F1 cream formulation was 52.2-80.6 % F2 was 41.4-65.2%, and F3(Placebo) was 0.375-43.67% and for standard drug diclofenac sodium observed within the range of 35.33-86.32%. The IC 50 value of F1 and F2 are 257.39µg/ml and 375.41µg/ml respectively. The reducing power of formulated rose water-basedcream increased with the increase of concentration (25-1000 µg/ml). The reducing power of cream noted as F1 ranges from xxvii 11.80 % to 81.55 %, F2 formulation antioxidant activity ranges from 8.05 % to 72.81 % and F3 formulation which is placebo cream 7.38% to 9.12%ascorbic acid equivalents (AES)µg/g. Four formulations of cough syrup are designed based on rose water and checked their antitussive activity at three different doses (5 ml, 10 ml and 15ml) against standard ivy extract 5 ml/70kg and Dextromethorphan 10 ml/70 kg and itobserved that C1 has the highest inhibition of a cough that is mean±S.E.M (9.00±2.08, 4.33±1.76 and 3.00±0.57) at 30min, 60 min and 90 minutes respectively. Part IV accentuates the overall discussion based on the results of rose water study. Rose water exhibit an anti-oxidant, anti-inflammatory, prevent premature aging, provide nourishment and glow to the skin prevent UV penetration. Rose water cream shows good anti-oxidant and anti-inflammatory activity and rose water based cough syrup has an excellent antitussive effect. Part V has the general conclusion and suggestions for future studies.