1-Khalafalla, A.I; A.A.Nayil, A.H.Nimir and I.Hajer (1990). Role of some passeriformes birds in transmission of Newcastle disease: I- Susceptibility of some wild birds of Sudan to Newcastle disease virus.  Bull.Anim.Hlth.Prod.Afr. 38, 45-49.

2-Khalafalla, A.I; I.Hajer  and A.H.Nimir (1990).  Role of some passeriformes birds in transmission of Newcastle disease: II- pathogenesis of Newcastle disease virus in Sudan house sparrows (Passer domesticus arborius). Bull.Anim.Hlth.Prod.Afr. 38, 51-54.

3-Khalafalla, A.I;A.H.Nimir and I.Hajer (1990).  Role of some passeriformes birds in transmission of Newcastle disease: III- Transmisibility of  Newcastle disease virus by Sudan house sparrows(Passer domesticus arborius). Bull.Anim.Hlth.Prod.Afr. 38, 55-58.

4-Khalafalla, A.I; A.Mustafa; Z.Abbas; I.Hajer and S.El Sammani (1990). Case report of a mild infection of infectious bursal disease in broiler chicks in the Sudan. Sudan J. Veterinary Research 10,45-49.

5-Khalafalla, A.I; M.A.Fadol, O.A.Hameid; Y.A.Hussein and Mahasin El Nur (1992). Pathogenic properties of Newcastle disease virus isolates in the Sudan. Acta Veterinaria Hungarica , 40 (4); 329-333.

6-M.Haroun; Khalafalla, A.I; I.Hajer (1992). Some properties of Newcastle disease virus field isolates in the Sudan. Bull.Anim.Hlth.Prod.Afr. 40 .; 107-110.

7-Mamoun, I.E; Khalafalla, A.I; Bakhiet, M.R; Agab, H.A.M; Y.A.Sabiel and H.J. Ahmed (1992) Salmonella entritidis infection in the Sudan. Revue Elev.vet. Pays trop. 45(2); 137-138.

8-Gaffar Elamin, M.A; Khalafalla, A.I and S.M. Ahmed (1993). Observation on the use of Komarov strain of Newcastle disease vaccine in the Sudan. Trop.Anim.Hlth & Prod 25: 151-154.

9-Khalafalla, A.I; M.A. Gaffar El amin and Z.Abbas (1993). Lumpy skin disease: Observations on the recent outbreaks of the disease in the Sudan.  Revue Elev.vet. Pays trop. 46 (4); 548-550.

10-Khalafalla, A.I (1994). Isolation and characterisation of lentogenic Newcastle disease viruses from apparently healthy chickens in the Sudan. Bull.Anim.Hlth.Prod.Afr., 42; 179-182.

11-Khalafalla, A.I; Agab, H.A.M and B. Abbas (1994). An outbreak of contagious ecthyma in camels (camelus dromedaries ( in eastern Sudan. Trop.Anim.Hlth & Prod . 26, 253-254.

12-Khalafalla, A.I; Z.Abbas and M.A.Elamin (1995). Lumpy skin disease in the Sudan. Light and electron microscopic characteristics of the skin lesion. Sudan J. of Veterinary Research 14, 9-14.

13-Khalafalla, A.I and M.E.H.Mohamed (1996). Clinical and epizootiological features of camelpox in eastern Sudan.  Journal of camel Practice and Research (2) , 99-102.

14-Khalafalla, A.I and M.E.H.Mohamed (1997). Epizootiology of camel contagious ecthyma in Eastern Sudan.  Revue Elev.vet. Pays trop 50 (2), 99-103.
15 -Khalafalla, A.I; Z.Abbas and M.E.H.Mohamed (1998). Camel papillomatosis in the Sudan. Journal of camel Practice and Research 5: 157-159.

16-Gitao, C.G; H.Agab and A.I.Khalafalla (1998). Outbreaks of Dermatophilus congolenses infection in camels (camelus dromedarius) from Butana region in eastern Sudan.  Revue sci. tech. Off. int.Epiz., 17(3) 743-748.
17-Gitao, C.G; H.Agab and A.I.Khalafalla (1998). A Comparison of camel Dermatophilos in Kenya and Sudan.  Annals of the New York Academy of Sciences 849, 461-464.

18-Gitao, C.G; H.Agab and A.I.Khalafalla (1998).  An outbreak of a mixed infection of Dermatophilus congolensis and Microsporum gypseum in camels in Saudi Arabia.  Revue sci.tech. Off. int.Epiz., 17 (3); 749-755.

19- Khalafalla, A.I (1998). Ortho- and parapox virus infections of camels in the Sudan. Proceedings of the 8th Arab Veterinary Conference, 24-28 March 1998, Friendship Hall, Khartoum, Sudan.pp 276-281

20-Khalafalla, A.I (1998).  Epizootiology of camelpox, camel contagious ecthyma and camel papillomatosis in the Sudan. Proceedings of the Third Annual Meeting for Animal production Under Arid Conditions. Vol.2: pp115-131, United Arab Emirates University Press.

21-Khalafalla, A.I;  M.E.H.Mohamed; A.M.Sobhi and M.I.Zaidan (1998). Isolation and identification of camel contagious ecthyma virus in the Sudan. Sudan J. Vet. Sci. and Anim.Husb 37 (1-2 ( 49-56.

22-Gitao, C.G; H.Agab and A.I.Khalafalla (1998( . Camel Dermatophilosis in Kenya, Sudan and Saudi Arabia. Proceedings of the Third Annual Meeting for Animal production Under Arid Conditions. Vol.2: pp93-107, United Arab Emirates University Press.

23-Khalafalla, A.I; M.E.H.Mohamed and H.Agab (1998). Serological survey in camels of the Sudan for prevalence of antibodies to camepox virus using ELISA technique. Journal of camel Practice and Research 5 (2) 197-200.

24-Khalafalla, A.I; M.E.H.Mohamed and B.H.Ali (1998).  Camel pox in the Sudan. 1- Isolation and identification of the causative virus.  Journal of camel Practice and Research 5 (2) 229-233.

25- Khalafalla, A.I and M.E.H.Mohamed (1998). Camel pox in the Sudan. 2- Some properties of camelpox viruses isolated in the Sudan.  Journal of camel Practice and Research 5 (2) 235-238.

26- Khalafalla, A.I (2000) Camel contagious ecthyma: Risks in young calves. Revue Elev.vet. Pays trop 53 (2);173-176.

27- Khalafalla, A.I (2000). Camel breeds in the Sudan.  Al Buhuth  , Vol.8. No.1, pp 233-241. Proceedings of the 4th Scientific Conference, National Centre for Research. Khartoum , Sudan.

28- Khalafalla, A.I  and  S.Awad (2001). Epidemiology of Newcastle disease in village poultry in the Sudan. In: Livestock Community and Environment, Proceedings of the 10th International Conference of the Association of International Tropical Veterinary  Medical Institutes, August, 20-23, 2001, Copenhagen, Denmark, pp 181-187.

29-Khalafalla, A.I (2001). Common skin diseases of camels in the Sudan. Proceedings of the 9th Arab Veterinary Conference, Baghdad, Iraq.

30-Ali, Y.H; Khalafalla, A.I; Intisar.K.Saeed (2001).  Seromonitoring of Infectious bursal disease (IBD) antibodies in some poultry flocks in Sudan. Sudan J. Vet. Sci. & Anim. Husb. 40 (1, 2), 45-55.

31- Khalafalla, A.I ; S.Awad and W.Hassan (2002). Village poultry production in the Sudan. In: Characterization and parameters of family poultry production in Africa. Results of a FAO/IAEA Co-ordination Research Program, IAEA, Vienna. pp 87-93.

32- Khalafalla, A.I; G.A. El Dirdiri (2003). Laboratory and field investigation of live attenuated and inactivated camelpox vaccines. Journal of camel Practice and Research.10 No.2, 191-200.

33- Abdelaziz, S.A; Khalafalla, A.I and Ali, A.S (2003). Newcastle disease in the Sudan. Prevalence of antibodies against the disease.  Bull.Anim.Hlth.Prod.Afr. 50 No 2,117-119.

34-Hassan, W; A.I.Khalafalla (2003). The effect of age of chickens on the immunogenicity and protective efficacy of Newcastle disease virus thermostable (I 2) vaccine under Sudan conditions. Sudan J. Veterinary Research Vol.18, 15-24.

35- Abdelaziz, S.A; Khalafalla, A.I; Ali, A.S and S.M.Elhassan (2004). Newcastle disease in village chickens in the Sudan. Survey of disease incidence and Isolation of the causative virus.  Journal of Animal and Veterinary Advances 3 (1):36-38.

36- Khalafalla, A.I; M.Büttner and H.-J. Rziha (2005). Polymerase chain reaction (PCR) for rapid diagnosis and differentiation of para-and orthopox virus infections in camels. Applications of Gene-Based Technologies for Improving Animal Production and Health in Developing Countries, pp 335-342. FAO/IAEA Publications, ISBN: 1-4020-3311-7 SPRINGER.

37- Saeed, I.K; A.I.Khalafalla, S.M.El Hassan, M.A.El Amin (2004)
Peste de Petit Ruminants (PPR) in the Sudan: Investigation of recent outbreaks, virus isolation and cell culture spectrum. Journal of Animal and Veterinary Advances 3 (6) 361-365.

 38- El Hassan. O.M., A.I.Khalafalla, S.M.El Hassan (2004). Detection of antibodies against camel contagious ecthyma in Sudan using passive hemagglutination test (PHT). Journal of Animal and Veterinary Advances 3 (6) 381-387.

39- Khalafalla, A.I; W.Hassan; M.El Nur; A.S.Ali (2006). Observations on production, laboratory testing and field application of I-2 thermostable Newcastle disease vaccine in the Sudan. In: Improving Farmyard Poultry Production in Africa: Interventions and Their Economic Assessment. Proceedings of the Final Research Co-ordination Meeting Organized by the Joint  FAO/IAEA Division of Nuclear Techniques in Food and Agriculture and held in Vienna, 24 – 28 May 2004.IAEA-TECDOC-1489, pp 228-235.

40- Khalafalla, A.I;S.A.Abdelaziz; S.M.El Hassan (2006). Increasing family poultry production in the Sudan through Newcastle disease control and improving housing. In: Improving Farmyard Poultry Production in Africa: Interventions and Their Economic Assessment. Proceedings of the Final Research Co-ordination Meeting Organized by the Joint  FAO/IAEA Division of Nuclear Techniques in Food and Agriculture and held in Vienna, 24 – 28 May 2004.IAEA-TECDOC-1489, pp 220-227.

41- Khalafalla, A.I (2004).  Biological properties of camel contagious ecthyma virus. Proceedings of the 11th International Conference of the Association of International Tropical Veterinary  Medical Institutes, August, 23-27, 2004, Sunway lagoon Resort Hotel, PJ, Malaysia, pp 278-280.

42- Ali, Y.H; A.I.Khalafalla; M.E.Gaffar; I. Peenze & A.D.Steele (2004).  Detection and isolation of group A rotavirus from camel calves in Sudan.  Proceedings of the 11th International Conference of the Association of International Tropical Veterinary  Medical Institutes, August, 23-27, 2004, Sunway Lagoon Resort Hotel, PJ, Malaysia, pp 302-304.

43- El Shafie, N.O; A.I.Khalafalla, A.A.Ibrahim & N.A.Ashor (2005). Investigation on Viral Arthritis in Broiler Chickens in Khartoum, Sudan. Journal of Animal and Veterinary Advances 4 (1): 145-149.

44- Abdel-Latif, M. M.  & A. I. Khalafalla (2005).  Detection by PCR of Multiple Subgroups of Avian Leukosis Virus (ALV) in Broilers in the Sudan. Journal of Animal and Veterinary Advances 4(3): 407-413.

45- Ali, Y.H; Khalafalla, A.I & El Amin, M.A (2005). Epidemiology of camel calf diarrhea in Sudan: Seroprevalence of camel rotavirus infection. Journal of Animal and Veterinary Advances 4 (3): 393-397.

46- Ali, Y.H; Khalafalla, A.I; El Amin, M.A; Peenze, I & Steele, A.D (2005). Rotavirus-Associated Camel Calf Diarrhoea in Sudan. Journal of Animal and Veterinary Advances 4 (3): 401-406.

47- Abdelmelik I. Khalafalla , Intisar K. Saeed , Yahia H. Ali , Amira M.El Hassan , Ali Abu Obeida , Mohamed Gasim , Zakia  Abbas  (2005). MORBILLIVIRUS INFECTION OF CAMELS IN EASTERN SUDAN. NEW EMERGING FATAL AND CONTAGIOUS DISEASE. Proceedings of the International Conference on Infectious Emerging Diseaase. Al Aain, UAE, 26th March- April 1, 2005.

48- Khalafalla, A.I; M.Büttner and H.-J. Rziha (2004). Camel contagious ecthyma: virus isolation in cell culture, molecular identification and antibody detection (sent for publication).

49- Ali YH, Khalafalla A.I, Gaffar M.E, Peenze I, Steele A.D (2005).
Determination of Camel Group A Rotavirus Subgroup Specificity (sent for publication).

50- Abdelmelik Ibrahim Khalafalla (2005) VIROLOGY, a Text Book for Student of Medical Sciences (Book) [in Arabic]. Proposal approved by the Microbiology Departmental Board and Dean Faculty of Veterinary Medicine.
51- Khalafalla, A.I, Rziha, H.J and Buettner, M (2006). Isolation and Molecular Characterization of the Camel Contagious Ecthyma Virus. Proceedings of The International Conference on Camels, Al Gassem University for Agriculture and Veterinary Medicine, Al Gassem, Saudi Arabia, May 10-12, 2006, p 387 – 396.
52- Khalafalla, A.I, Wathig H. Mohamed, Galal M. Yousif, Mohamed K. Abdullah, Ali M.A.Majid, Hamid.S.Abdalla, Yahia.H.Ali (2007). Camel breeds in Sudan and Future Prospectives. Proceedings of the Conference on The Genetic Resources of the Sudanese Livestock Wealth, Organized by College of Agricultural Studies, Sudan University of Science and Technology, Khartoum 5-6 March 2007.
53- Khalafalla, A.I and  Ali, Y.H (2007), Observations on Risk Factors Associated with Viral Diseases of Camels in Sudan. Proceedings of the 12th International Conference of the Association of Institutions of Tropical Veterinary Medicine, Montpellier, France 20-22 August 2007, pp 101-105.

*Scientific Achievements:

1- First report on isolation of lentogenic Newcastle disease viruses in the Sudan.
2- First report on isolation of camel poxvirus in the Sudan and determination of its biological properties.
3- Determination of the epidemiology of Camel Contagious Ecthyma including clinical signs, morbidity and mortality rates. This disease was known as a sparsely studied disease. A number of 10 articles were published our research group on this disease that covers most aspects of its epidemiology.
4- First report on the isolation of the Camel Contagious Ecthyma Virus and the molecular characterization of its genome.
5- First report on camel Papillomatosis in the Sudan.
6- Development of a Polymerase chain reaction (PCR) for rapid diagnosis and differentiation of para-and orthopox virus infections in camels. This test remarkably improved diagnosis of poxvirus infections in camels. The result can be reached within a working day of receipt of specimens.
7- First report on the Detection by PCR of Multiple Subgroups of Avian Leukosis Virus (ALV) in Broilers in the Sudan.
8- First report on morbillivirus infection in camels. Our research team was the first to diagnose a peracute highly fatal disease that affects camels in eastern Sudan during August-November 2004.
9- Introduction of Polymerase chain reaction (PCR) for diagnosis of animal viral diseases in the Sudan at the Virology Research Laboratory, Department of Microbiology, Faculty of Veterinary Medicine.  The current list of diseases that can be diagnosed by PCR includes Newcastle disease, Infectious bursal disease, Avian Laryngotracheitis, Avian Influenza, Infectious bronchits, Avian leukosis, Marek`s Disease, Foot and Mouth Disease, sheep/goat pox, camelpox, contagious ecthyma in cattle, camel, sheep and goats, Avian pox and Papillomatosis in camels, cattle and sheep.