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Samir, A., and M. Wasfy, "A Simple Technique for Long-Term Preservation of Leptospires", Journal of Basic Microbiology. , vol. 53, issue 3, pp. 299 – 301, 2013. Abstract

The viability of six serovars of Leptospira spp. was studied after long storage at −70°C. The bacteria were either preserved in Ellinghausen–McCullough–Johnson–Harris (EMJH) liquid growth medium or in sheep blood added as a cryoprotectant. The viability of the strains was observed on a monthly basis by dark-ground microscopy over a period of 20 months at −70°C. Addition of sheep blood was not significantly advantageous, since leptospires that were stored in EMJH showed a slight increase in number after recovery. The results suggest a very simple and useful technique for long-term preservation of such Leptospira.

M.E.Hatem, N.S.Ata, A.M.Abdou, E.S.Ibrahim, M.Bakry, and A.Samir, "Surveillance of bovine leptospirosis: Isolation and serodiagnosis", Global Veterinaria., vol. 13, issue 1, pp. 127-132, 2014.
El-Hariri, M., R. Soliman, and A. Samir, "Surveillance of Johne’s Diseases Bacterium, Mycobacterium avium Subspecies Paratuberculosis in Dairy Cattle in Egypt using Three Laboratory Diagnostic Techniques", International Journal of Veterinary Science, vol. 3, issue 1, pp. 33-36, 2014.
Panda, S. S., O. S. Detistov, A. S. Girgis, P. P. Mohapatra, A. Samir, and A. R. Katritzky, "Synthesis and molecular modeling of antimicrobial active fluoroquinolone –pyrazine conjugates with amino acid linkers", Bioorganic and Medicinal Chemistry Letters, vol. 26, issue 9, pp. 2198-2205, 2016.
Faidallah, H. M., A. S. Girgis, A. Samir, and et al, "Synthesis, antibacterial properties and 2D-QSAR studies of quinolonetriazole conjugates", . European Journal of Medicinal Chemistry. , vol. 143, pp. 1524–1534, 2018.