Abdallah M. Shahat

Accomplished Postdoctoral Researcher with a robust background in animal science, demonstrated through a distinguished tenure at Fort Valley State University and Cairo University. Expert in theriogenology, with a proven track record in enhancing student knowledge and leveraging online learning platforms like Moodle. Skilled in leadership and effective communication, significantly contributing to academic and community service excellence.

• Division of Animal Science, College of Agriculture, Family Sciences, and Technology
• Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University

• Published more than 15 original papers plus 1 review paper in good-quality journals
• Attended several conferences during PhD

1. Adel, O., El-Sherbiny, H. R., Shahat, A. M., & Ismail, S. T. (2024). Effect of a single dose of letrozole on ejaculation time, semen quality, and testicular hemodynamics in goat bucks subjected to heat stress. Veterinary Research Communications, 48(6), 3941-3952.

2. Ola Adel, Hossam R. El-Sherbiny, Abdallah M. Shahat, Sayed Taha Ismail (2024). N-acetylcysteine supplementation improves testicular hemodynamics, testosterone levels, seminal antioxidant capacity, and semen quality in heat-stressed goat bucks. Reproduction in Domestic Animals; 59(8), e14709.

3. Fadl, A. M., Samir, H., & Shahat, A. M. (2024). Repeated injections of vitamin E and Se improves testicular morphology, testosterone and in vitro and in vivo sperm fertility in subfertile rabbits. Veterinary Research Communications, 48(5), 3157-3166.

4. Saurabh Tiwari, Abdallah Shahat, John Kastelic, Nehal Thakor, Jacob Thundathil (2024). Optimized total RNA isolation from bovine sperm with enhanced sperm head lysis. Biochemistry and Cell Biology, 102, 194-205.

5. Shahat, A. M., Thundathil, J. C., & Kastelic, J. P. (2023). Melatonin improves post-thaw sperm quality after mild testicular heat stress in rams. Reproduction in Domestic Animals, 58, 423-430.

6. Shahat, A. M., Juan Castillo, Thundathil, J. C., & Kastelic, J. P. (2023) Angus bulls voluntarily access shade during hot weather, reducing scrotal subcutaneous temperatures and improving sperm quality. Canadian Journal of Veterinary Research, 8, 17-22.

7. Shahat, A. M., Thundathil, J. C., & Kastelic, J. P. (2022). Melatonin improves testicular hemodynamics and sperm quality in rams subjected to mild testicular heat stress. Theriogenology, 188, 163-169.

8.  El-Shalofy, A. S., Shahat, A. M., & Hedia, M. G. (2022). Effects of melatonin administration on testicular hemodynamics, echotexture, steroids production, and semen parameters during the non-breeding season in Ossimi rams. Theriogenology, 184, 34-40.

9.  Shahat, A. M., Thundathil, J. C., & Kastelic, J. P. (2022). Melatonin or L- arginine in semen extender mitigate reductions in quality of frozen-thawed sperm from heat-stressed rams. Animal Reproduction Science, 238, 106934.

10. Juan M Castillo, Abdallah M Shahat, Jacob C Thundathil, John P Kastelic (2022). Pathogenesis of and resistance to testicular heat stress based on differentiation of spermatocytes and spermatids. Animal Reproduction Science 247, 107123.

11.  Guilherme Rizzoto, Abdallah Mohamed Shahat, John Patrick Kastelic, João Carlos Pinheiro Ferreira (2022). Atualização sobre o estresse térmico testicular. Rev. bras. reprod. anim, 148-153.

12. El-Sherbiny Hossam, Shahat Abdallah, Hedia Mohamed, El-Shalofy Amr (2022). Effect of sexual maturation on testicular morphometry and echotexture and their association with intratesticular blood flow in ossimi rams. Indian Journal of Small Ruminants 28 (1), 85-90.

13. John Patrick Kastelic, Guilherme Rizzoto, Abdallah Mohamed Shahat, João Carlos Pinheiro, Jacob C Ferreira. Pathogenesis and mitigation of the deleterious effects of heat stress on bull. Rev Bras Reprod Anim 45 (4), 518- 524.

14. Shahat, A. M., Thundathil, J. C., & Kastelic, J. P. (2021). Scrotal subcutaneous temperature is increased by scrotal insulation or whole-body heating, but not by scrotal neck insulation; however, all three heat-stress models decrease sperm quality in bulls and rams. Journal of Thermal Biology, 100, 103064.

15. Abdallah M Shahat, Jacob C Thundathil, John P Kastelic (2020). Data loggers in scrotal subcutaneous tissues reliably assess intrascrotal temperatures in rams. Small Ruminant Research, 193: 106247.

16.  AM Shahat, G Rizzoto, JP Kastelic. (2020). Amelioration of heat stress- induced damage to testes and sperm quality. Theriogenology, 158: 84-96.

17. A. M. Ghallab, Mostafa M. Abou-Ahmed, Aya M. Fadl, Diya A. El-Badry, Abdallah M. Shahat and Adel R. Moawad (2019). Optimization the protocol for cryopreservation of Arabian stallion spermatozoa: Effects of centrifugation, semen extenders and cryoprotectants. CryoLetters 40 :129- 138.

18. AbdelRaouf M. Ghallab, Abdallah M. Shahat, Aya M. Fadl, Mohamed M. Ayoub, Adel R. Moawad (2017). Supplementation of semen extender with antioxidants improves the quality of chilled or cryopreserved Arabian stallion spermatozoa. Cryobiology, 79 :14-20.

· IETS (International Embryo Technology Society), 2025, Fort Worth, Texas, USA.

· The Applied Reproductive Strategies in Beef Cattle (ARSBC) conference (Athens, Georgia, September 2024).

· 1890 Multistate Integrated Project: Climate Change (Montgomery, September 2024).

· Theriogenology conference in Bellevue, Washington, July 2022 (oral and poster presentation).

· Theriogenology conference in Omaha, July 2021 (oral presentation).

· American Society of Andrology conference, April 2021 (poster presentation).

· UCVM Graduate Research Day U of C, May 2021 (short oral presentation).

· UCVM Graduate Research Day U of C, January 2020 (poster presentation).

* Participated in 3rd level Veterinary Students' integrated research project (The effects of Melatonin and Percoll gradient density centrifugation on the motility and morphology of cryopreserved bovine sperm), 2022, University of Calgary

* Participated in Artificial insemination (AI)  project in beef cows in Georgia as part of Fort Valley State University's extension work fro farmers.

• IETS (International Embryo Technology Society), 2025, Fort Worth, Texas, USA
• The Applied Reproductive Strategies in Beef Cattle (ARSBC) conference, 2024, Athens, Georgia
• Video Science Communication workshop, University of Calgary, 2022
• Animal surgery course, University of Calgary, 2019

• One master students working on IVEP in buffalos (Cairo University)
• Two PhD students working on camel Epididymal sperm and amelioration strategies for heat stress in goats (Cairo University)
• Ten master students at Fort Valley State University (mentoring and Thesis committee member)

• Arabic, Mother Language
• English, Fluent (Academic IELTS: 7)

• Prof. John P. Kastelic, Professor, Cattle Reproductive Health - Theriogenology, (403) 210-8660, j.kastelic@ucalgary.ca, 1E15, TRW Building, 3280 Hospital Drive NW, Calgary, AB, T2N 4Z6, Canada
• Prof. Jacob Thundathil, Professor of Theriogenology, (403) 220-8244, jthundat@ucalgary.ca, 2D13, TRW Building, 3280 Hospital Drive NW, Calgary, AB, T2N 4Z6, Canada