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Research Interest

I have a background in molecular ecology of RNA viruses and bacteria. My general research interest focuses on understanding the ecology and evolutionary dynamics of pathogens. I have worked with Prof. Dr. Mary Poss in understanding the consequences of live virus vaccination on the evolution of avian Paramyxovirus type 1 via in silicostudies. In addition, I am also interested in understanding the cross-species transmission, pathogenesis and the evolution of this virus through  in vivo and in vitro experiment studies. I am also interested in understanding the metagenomics of viral enteric reservoirs of non-human primates and the consequence of diet on the viral ecology of this animals. My research interests also include, but not limited to the biodiversity and ecology of insect and mammalian viruses and bacteria.

Selected Publications


Chong, YL, Kim, O, & Poss. (2014). Lineage diversification of pigeon paramyxovirus effect re-emergence potential in chickens. Virology, 462-463:309-317.

Bilung, LM, Ling, KK, Apun, K, Abdullah, MT, Rahman, MA, Ming, CY, Benjamen, A, Chong YL & Hashim, HF. (2004). Occurrence of Escherichia coli in wildlife from different habitats of Sarawak, Malaysia. Borneo Journal of Resource Science and Technology, 4(1):19-27.


Chong YL, Lam TT, Kim O, Lu H, Dunn P, Poss M. (2013). Successful Establishment and Global Dispersal of Genotype VI Avian Paramyxovirus Serotype 1 after Cross Species Transmission. Infect Genet Evol 17:260-268. [Impact factor = 3.166]

Lam TT, Chong YL, Shi M, Hon CC, Li J, Martin DP, Tang JW, Mok CK, Shih SR, Yip CW, Jiang J, Hui RK, Pybus OG, Holmes EC, Leung FC. Systematic phylogenetic analysis of influenza A virus reveals many novel mosaic genome segments. Infect Genet Evol. 2013 Mar 30. doi:pii: S1567-1348(13)00088-9 (In press). [Impact factor = 3.166]


Apun K, Kho KL, Chong YL, Hashimatul FH, Abdullah MT, Rahman MA, Lesley MB, Samuel L. (2011). Detection of Escherichia coli O157:H7 in Wildlife from Disturbed Habitats in Sarawak, Malaysia. Research Journal of Microbiology 6(2):132-139. [Scopus Index]


Chong YL, Padhi A, Hudson PJ, Poss M. (2010). The Effect of Vaccination on the Evolution and Population Dynamics of Avian Paramyxovirus-1. PLoS Pathog 6(4): e1000872. [Impact factor = 9.172]


Apun K, Chong YL, Abdullah MT and Micky V. (2008). Antibiotic Susceptibilities of Escherichia coli Isolated from Food Animals and Wildlife Animals in Sarawak, East Malaysia. Asian Journal of Animal and Veterinary Advances. 3(6):409-416. [Impact factor = 0.869]


Chong YL, Apun K, and Abdullah MT. (2007). Occurrence of the Enteric bacteria and Nonpathogenic Escherichia coli as well as Their Antimicrobial Susceptibility Profiles in Bats and Rodents Isolated from Two Selected Primary Lowland Forests in Sarawak, Malaysia. Proceedings of Conference on Natural Resources in the Tropics: Development and Commercialization of Tropical Natural Resources, pg 123-130.

Chong YL, Apun K, Abdullah MT, Micky V and Paul I. (2005). Comparative DNA diversity and antimicrobial profiles of non-shiga toxin-producing E. coli isolates from animal host sources. Proceedings of the 8th Symposium of Applied Biology,Marriott Putrajaya Hotel, Putrajaya, 22-23 June, 2005. p. (In CD 4 pages).

Apun K, Nor Fazila S, Nurzaliza R, Hayati A, Chong YL and Micky V. 2005. PCR detection and antimicrobial resistance pattern of E. coli strains from river water and wastewater. Proceedings of the 8th Symposium of Applied Biology, Marriott Putrajaya Hotel, Putrajaya, 22-23 June, 2005. p. (In CD 5 pages).


83RD Northeastern Conference on Avian Disease, Lancaster, PA, September 21-22, 2011 (Oral Presenter). Title: Chong YL,Kim O, Lu H, Dunn P and Poss M.  Newcastle disease: Evolution of Pigeon Paramyxovirus Serotype 1(PPMV1) in Pennsylvania.

Ecology and Evolution of Infectious Disease (EEID) 7th Annual Workshop, University of Georgia May 16-19, 2009 (Poster Presentation). Title: Chong YL, Padhi A, Hudson P, and Poss M. Evolutionary Dynamics of Class II Avian Paramyxoviruses Serotype 1 (PMV-1).

Abdullah MT, Kho AHG, Chong YL, Sazali SN, Eileen L, Roberta CTT, Hassan N, Baharuddin A, Yakub MA, And Hasbullah NA. 2007. Using DNA for Species Identification of Selected Malaysian Wildlife. Biomalaysia 2007, 26th -30th November 2007, Putra World Trade Centre (PWTC), Kuala Lumpur (Poster Presentation).

Kho AHG, Chong YL, Roberta CT., Yuzine E. and MT Abdullah. 2007. Revisiting Wallace’s Line Using Cynopterus species Inferred from Partial Mitochondrial DNA Cytochrome b Gene. 9th Hornbill Workshop 2007, 5th – 7th December 2007, Rajah Court Hotel, Kuching.

Eileen L, Roberta CTT, Baharuddin A, Yakub MA, Hasbullah NA, Andy Kho, Chong YL, Abdullah MT. 2007. DNA Barcoding of Indigenous Wildlife Species in Malaysia. 9th Hornbill Workshop 2007, 5th – 7th December 2007, Rajah Court Hotel, Kuching.

MT. Abdullah [presenter], Kho AHG, Jayaraj VK, Chong YL and Hazali R. 2007. Phylogeny Inferred By Using Partial 12S/16S Gene and Morphometric Assessment Using Multivariate Analysis of (Chiroptera: Pteropodidae: Pteropodinae) From Malaysia. Unimas Research Symposium 2007, 10th – 14th December 2007, Unimas.

Chong YL, Kasing A and MT Abdullah. 2007. Use of ERIC-PCR Fingerprinting for Commensal Escherichia coli Distribution Patterns in Wildlife of Different Habitats. Unimas Research Symposium 2007, 10th – 14th December 2007, Unimas.

Apun K, Chong YL and Micky V. 2005. Genetic structure of E. coli isolates from broiler and village chickens during transition from primary to secondary habitats. Proceedings of the 27th Symposium of Malaysian Society of Microbiology, Grand Plaza Park Royal, Penang, 24-27 November, 2005.


Molecular Ecology; PLoS One; Veterinary Microbiology.


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