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Characterization and Efficacy of Different Aflatoxin Detoxifying Agents

Thesis Info

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Author

Subhani, Zinayyera

Program

PhD

Institute

University of Agriculture

City

Faisalabad

Province

Punjab

Country

Pakistan

Thesis Completing Year

2018

Thesis Completion Status

Completed

Subject

Biochemistry

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/13509/1/2012-ag-42%20Ph.D%20thesis.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676725675203

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For numerous decades poultry production has increased to meet the intensified meat demand, although, changes in production practices had significant effect on the progression of health challenges. Consequently, as the production was intensified, there was increase in animal health risk, some of the utmost important health challenges are related to feed quality. The growth of filamentous fungi, aside from its deterioration, notorious because of mycotoxin production, among them aflatoxins are drastically toxic that induces significant economic losses in poultry industry, such as decreased productivity and damages on poultry’s carcass. This research study was focused to explore the detoxifying potential of natural reservoirs for aflatoxin B1. By keeping an eye on diverse potentiating naturally occurring reservoirs, O. corniculata, L. edodes, C. pyrenoidosa, C. tetraglobana and sodium bentonite were selected to use them as detoxifier against aflatoxicosis in broiler chicks. The phytochemical investigation for O. corniculata for its phytochemical constituents revealed the presence of various secondary metabolites including flavonoids, alkaloids, terpenoids, tannins, coumarins, saponins, cardiac glycosides and phlobotannins while anthraquinones were absent. Carbohydrates were present in high concentration in C. tetraglobana, while, L. edodes was found to be rich source of fiber as compared to other selected samples determined by proximate analysis. Numerous techniques were used for characterization each having unique feature like XRD, SEM, TGA, FTIR and LIBS. Experimental aflatoxin production was carried out through fermentation on basmati rice and analyzed by using HPLC. In vivo, aflatoxicosis induction in broiler chicks AFB1 (350 ppb) in basal diet. A 35 days experiment was carried out in which broiler chickens were consuming two levels of L. edodes, C. tetraglobana, O. corniculata, C. pyrenoidosa, and sodium bentonite both with and without dietary aflatoxin. In this study, at weekly intervals, the data were collected and compared as traditional measures of aflatoxicosis (growth rate, feed consumption, FCR). The results of this study demonstrate that supplementation with LE (10%), CT (1%) and CP (500 mg) provided protection against negative effects on growth performance, serum traits, antioxidant status, liver and renal damage induced by AFB1. The current research study explored the selected naturally occurring aflatoxin detoxifiers in a very comprehensive and presented another approach of their biological aspects. These results may be used as foundation or prime study for the production of mycotoxin detoxifiers with least side effects, which not only detoxify the counteracting toxin but also improve nutritional index of broiler diet. Further detailed trials are recommended including animal model and cell lines.
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عشق دا روگ

عشق دا روگ
عشق نے دل وچ پایا زور
اودوں جگ وچ مچ گیا شور
لوکی مینوں پاگل کہندے
مینوں ویکھ کے ہسدے رہندے
اسیں تے طعنے مہنے سہندے
کسے نال نہ پایا کھور
وکھری دنیا مل گئی مینوں
حسد کریں کیہہ ملدا تینوں
دل دی آکھ سناواں کیہنوں
سب دسدے نے ہور دے ہور
یار پنل جد دل نوں بھایا
سسی رو رو حال ونجایا
اوہ ستی تے یار گنوایا
ملیا کیچ تے نہ بھنبھور
قادریؔ سائیں سمجھ نہ آئی
جس گھر عشق نے جھاتی پائی
جلی کلی پھوک جلائی
دُکھاں وچ نہ ہووے بور

سرکاری مناصب و ذرائع کا ذمہ دارانہ استعمال: تعلیمات نبویﷺ کی روشنی میں

Islam is a complete code of life for the humanity. It provides guidance in all aspects of human activity. It guides human being in its economic system, social life, in all worships, in family life and in political set up. State is an institution like others which is a tool for mankind to serve its needs in the best possible ways. Islam does not consider a state designed by Allah and in fact leaves the system open to human intellect, to form a mechanism according to the teachings of the scriptures and needs of the time. The guiding principles of Islam stress on proper utilizations of state machinery and authority to the satisfaction of people and to fulfill dictates of Allah’s directions. Islam forbids utilization of public offices for personal benefits. Islamic traditions instructed that the state officials must learn  from the principle of Islam as exemplified in the state at the city of Medina; it additionaly shaped its characters as well. The present article is an attempt to highlight the teachings of Prophet Muhammad (SAW) that he gave from time to time and ensured its applications letter and spirit.

Antimicrobial Resistance and Genotyping of Extended Spectrum Beta-Lactamase Producing Clinical Isolates

The development of resistance mechanism in Gram-Negative bacteria is growing all over the world affecting developing countries the most. Extended Spectrum Beta-lactamase (ESBLs) production is one of the widespread mechanisms of resistance associated with irrational or excessive use of extended spectrum cephalosporins. The ground objective of this study was to investigate the prescribing pattern of broad spectrum antibiotics in hospital setup and the prevalence of ESBL production in Gram-Negative clinical isolates collected from an outpatient source by both phenotypic and genotypic detection. The study also focused on the treatment options available to treat resistant clinical isolates of Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa and Proteus mirabilis. Total 685 in-patient data were collected over a period of three months for the prescribing patterns of extended spectrum antibiotics used alone or in combination. The data were analyzed for the utilization of extended spectrum antibiotics in various wards either empiric or prophylactic use of broad spectrum cephalosporins. For the prevalence of ESBL production, 1005 clinical isolates of E. coli, K. pneumoniae, P. aeruginosa and P. mirabilis were collected from an out-patient source. Antimicrobial susceptibility and resistance patterns were determined by Kirby-Bauer disc diffusion method under the recommended guidelines of Clinical Laboratory Standard Institute (CLSI). Phenotypic detection of ESBL was performed on 352 clinical isolates using the double disc synergy test between amoxicillin/clavulanic acid (10μg) and ceftazidime or cefotaxime (30μg) disc. Multidrug resistance among ESBL positive isolates was also determined. Pearson’s or Fisher’s exact Chi-square test was used to analyze statistical association between ESBLs and Non ESBLs at 0.05 level of significance. Furthermore, polymerase chain reaction was used for the identification of TEM, SHV and CTX-M gene in ESBL positive clinical isolates. The prescribing pattern in hospital setup revealed that 75% of the overall antibiotics were prescribed for prophylactic treatments, whereas, among all prescribed antibiotics the frequency of broad spectrum cephalosporins alone or in combination was found to be the highest. Out of 1005 gram-negative clinical isolates, prevalence was found to be E. coli 680 (67.66 %), K. pneumoniae 248 (24.67%), P. mirabilis 3 (0.3 %) and P. aeruginosa XIII 74 (7.36%). Out of 352 clinical isolates, 96 (27.27%) were ESBL positive, female preponderance was found in 62 (67%), whereas 32 (33%) were males. E. coli was the most prevalent ESBL producers 79 (82%), followed by K. pneumoniae 16 (17%) and P. mirabilis 1 (1%). The urinary tract infections were the most commonly recovered infections i.e., 72 (75%), and among them 63 and 9 were E. coli and K. pneumoniae respectively. Age groups of 16-30 and 46-60 years were most affected with ESBL producing uropathogenic E. coli with a high prevalence in females. A high rate of resistance was observed against broad spectrum cephalosporins, fluoroquinolones, amoxicillin/clavulanic acid, sulfamethoxazole/trimethoprim and ampicillin. Whereas, amikacin, imipenem, tazobactam/piperacillin and fosfomycin were found effective antibiotic choices. The rate of multidrug-resistance was found to be 95%, 62.5% and 100% in ESBL producing E. coli, K. pneumoniae and P. mirabilis respectively. Statistical evaluation between ESBLs and Non ESBLs revealed significant association in E. coli (p 0.0004) and K. pneumoniae (p 0.032). Genotype identification revealed the presence of TEM, SHV and CTX-M genes in 82.14% (69/84) of the isolates. CTX-M was the most prevalent gene found in 59.5% (50/84) of the isolates, followed by TEM 41.6% (35/84) and SHV 13% (11/84). CTX-M was dominant among uropathogenic E. coli related to community acquired urinary tract infections. The study concluded an increased prevalence rate of ESBLs in E. coli, most of them recovered from urinary tract infections. The study also found an increased rate of multidrug-resistance among Gram-Negative clinical isolates. These incidences can be reduced by the restricted use of broad spectrum cephalosporins. The spread of ESBL producing uropathogenic E. coli can be controlled by implementing ESBL screening along with limiting the use of empiric therapy. Nevertheless, hygienic practices must be employed to reduce the incidence of community onset urinary tract infections.