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Gender Differentiation From Fingerprint Ridge Count In Pakistani Population

by Ahmed Fayyaz | Prof. Dr. Tahir Yaqub | Dr. Muhammad | Ms. Sehrish Firyal.

Material type: book Book; Format: print Publisher: 2013Dissertation note: In forensic science, fingerprinting has been used for decades as an efficient tool for identification of persons linked to an illegal activity or a crime scene. Different methods for the development and analysis of the latent fingerprints have been introduced including optical, physical and chemical methods. Each method has its own importance in the development and examination of the latent prints, which are invisible to naked eye before the application of fingerprint development methods. A lot of work has been published worldwide regarding fingerprinting. It was also reported that there is a significant difference in the ridge density of males and females. Ridge count might be helpful in the gender differentiation in Pakistani population. Patent prints of 100 males and 100 females were taken on A4 size paper or card paper using pelikan black inkpad and analysis was done with the help of 10x magnification lens. The ridges were counted diagonally within a square of 5mm x 5mm. This value depicts the number of ridges per 25 mm2. Results were analyzed by using Multivariate analysis of variance (MANOVA). The results of this study are used as a helpful tool for forensic expert and law enforcement. It reveals that females have finer epidermal ridge detail than males. The degree of ridge density is used as presumptive indicator of gender of unknown print left at a crime scene. First we qualitatively examine if prints appear coarse or fine and then by quickly quantifying ridge density or ridge count in a manner similar to method described in this study. The outcomes of this study will be helpful in exoneration of innocents in different crimes. Availability: Items available for loan: UVAS Library [Call number: 1668,T] (1).

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Molecular Characterization Of Antimicrobial Resistance Genes In Salmonella Isolates From Poultry

by Saba Zeb Khan | Prof. Dr. Tahir Yaqub | Dr. Muhammad | Ms. Sehrish Firyal.

Material type: book Book; Format: print ; Literary form: not fiction Publisher: 2013Dissertation note: Salmonella is a gram negative bacteria which can cause a number of different diseases including gastroenteritis, bacteremia, and typhoid fever, with the most common being gastroenteritis, some serotypes of it are pathogenic and cause serious food poisoning in humans and major economic losses in both chicken and turkeys. The birds can be the reservoir of Salmonella species which cause food borne infections in human. Human get such infections by ingesting contaminated products. In poultry farms, Salmonella can be introduced by means of contaminated feeds, particularly those that contain animal raw materials. Use of antibiotics in poultry has become a popular practice. Different antibiotics like tetracycline, streptomycin, trimethoprim etc. are given in poultry via water and feed for growth and protection against diseases. Extensive and uncontrolled use of antibiotics resulted in increased development of antibiotic resistant bacteria. Statistical data shows that Salmonella is resistant to many antibiotics especially tetracycline. The goal of our study was Molecular characterization of tetracycline resistance genes in Salmonella spp. and to check the prevalence of tetracycline resistance genes in Salmonella isolates from poultry drinking water. Total 50 water samples were collected from different poultry farms and poultry meat shops in Lahore district.Various biochemical tests were performed to confirm the isolated strains as Salmonella. Tetracycline resistance was examined against isolates. Plasmid DNA was extracted from these bacteria. Antibiotic resistant plasmid genes were amplified by PCR. After gel electrophoresis the resulting fragments were sequenced through genetic analyzer. After sequencing the sequence thus obtained was compared with the reported sequences of tet genes in Salmonella strains in NCBI. It was found out that Salmonella isolates from the poultry drinking water are highly resistant to tetracycline, as 83% of the isolated Salmonella from poultry drinking water showed their resistance towards tetracycline.PCR amplification of tet genes indicated the presence of tetA gene in 100% of tetracycline resistant Salmonella, whereas 64% of the samples contained tetB gene. TetB gene was present only in combination with tetA gene. None of the sample contained tetC, tetD and tetGgene. This study helped to find out the prevalence of antibiotic resistant genes in Salmonella isolated from poultry drinking water, which were potential threats to human being and this study will also help us in future to develop strategies to restrict the emergence of antibiotic resistant genes and their spread. Availability: Items available for loan: UVAS Library [Call number: 1714,T] (1).

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Trace Analysis Of Gun Shot Residue On Different Fabrics Using Locally Manufactured Ammunition In Pakistan

by Muneeba Butt | Prof. Dr. Tahir Yaqub | Ms. Faiza | Ms. Sehrish Firyal.

Material type: book Book; Format: print Publisher: 2013Dissertation note: Abstract Availability: Items available for loan: UVAS Library [Call number: 1733,T] (1).

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