Every organism has deoxyribonucleic acid (DNA) within their cells. DNA is a complex molecule that contains all of the information needed to build and maintain living organisms. Extraction of deoxyribonucleic acid (DNA) is one of the most basic and critical steps affecting molecular-based techniques in the study of DNA that allow vast advances in genetic, molecular biology, biotechnology, forensic, and bioinformatics laboratories. Therefore, researchers have been used different modified and optimized protocols for efficient genomic DNA extraction from biological samples. Due to the high amount of genetic material in whole blood samples so it's one of the main sources used to obtain DNA and there are many different protocols available in this issue. In the present study, we optimized, evaluated by comparison to phenol-chloroform (traditional method) and silica column (QIAamp DNA Blood Mini Kit) DNA extraction procedures. The extracted DNA by these protocols was analyzed according to their time consuming, quality, quantity, cost and toxicity. Extracted DNA with current protocol was qualified using gel electrophoresis, Nanodrop spectrophotometric analysis. Our results showed that there are not significantly differences between these methods about DNA Purity (A260/A280) and DNA yield (ng DNA/μl). In addition, phenol/chloroform (traditional method) was the most toxic method; it takes more time but cheaper than other method; it yielded reasonably good quantities of good quality DNA and would be suitable for large-scale genotyping of blood samples. The silica column method (QIAamp DNA Blood Mini Kit) was the most expensive among the other method but the least extraction time was required and it was the safest method. arabic 11 English 69
Ghada Salem, Ahmed Zaid(1-2018)

Measles, Mumps ,and rubella (MMR) are serious diseases that can lead potentially to disability and death. The study aimed to determine seroprevalence rates of antibody levels against MMR among Libyan children at school entry. This was a cross sectional study undertaken in Tripoli, from August to September 2016. Children of school-entry age (> 5 to ≤ 7 years) were randomly recruited at vaccination centers. Sera were tested for antibodies againstMMR. Data analyzed by SPSS program version 20. Out of 546 children, 290 were males. IgG antibodies against measles, mumps, and rubella were positive in 513 (94%), 436 (80%), 538 (98.5%) children, respectively. Seropositivity rates in Libyan children at school entry is protective and this is similar in so many other studies. This indicates that MMR vaccine program is effective in strengthening herd immunity in the Libyan community. arabic 19 English 111
Mohamed Abugalia, A Bashein(1-2021)

Objectives: The objective of this study is to study the demographic, clinicopathological features, and geographical distribution of differentiated thyroid cancer (DTC) among Libyan patients referred from all parts of the country to the nuclear medicine department, for radioactive iodine (RAI) therapy.Materials and Methods: Retrospective review of medical records of 265 patients with differentiated thyroid carcinoma (DTC) referred to RAI therapy in the Nuclear Medicine Branch‑Tripoli Medical Center, in the period from May 2005 to October 2010. The data analyzed included sex, age at the time of diagnosis, the city of residence, pathological diagnosis, the extent of disease, and types of treatment.Results: There were 225 (84.9%) females and 40 (15.1%) males giving a sex ratio of 5.6:1. The mean age of males at diagnosis was 51.2 ± 14.8 (range 24–78) years and  the  mean age  of  the  females was  44.6 ± 15.6 (range 10–95) years. Two  hundred and  twenty‑three (84.2%) had  papillary thyroid cancer (PTC), 31 (11.7%) had  follicular thyroid cancer, 3 (1.1%) had  Hurthle cell  thyroid cancer, and  2 (0.8%) had follicular‑insular thyroid cancer. About 43 (16.2%) had  a  history of  multinodular goiter, and  3 (1.1%) Hashimoto’s thyroiditis. From data  collected, cervical lymph node metastases were found in 45 (17.0%), and distal metastases in 27 (10.2%).Conclusions: PTC was the most common type of DTC. DTC was more common among females. The current study showed that the disease tends to occur at an older age, and with less cervical lymph node metastases than previously reported.
Hawa Juma El-Shareif(3-2018)