DAO 120:195-204 (2016)  -  DOI: https://doi.org/10.3354/dao03028

Molecular and pathological characterization of Fusarium solani species complex infection in the head and lateral line system of Sphyrna lewini

Nopadon Pirarat1, Komsil Sahatrakul2, Sitthichok Lacharoje1, Eric Lombardini3, Nantarika Chansue2, Somporn Techangamsuwan1,4,* 

1STAR Wildlife, Exotic and Aquatic Pathology, Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
2Department of Veterinary Medicine, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
3Armed Forces Research Institute of Medical Sciences, Bangkok 10400, Thailand
4Center of Emerging and Re-emerging Infectious Disease in Animals (CUEIDAs), Faculty of Veterinary Science, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand
*Corresponding author:

ABSTRACT: A severe fungal infection affecting the head and lateral line system was diagnosed in 7 captive scalloped hammerhead sharks Sphyrna lewini in an aquarium in Thailand. Extensive and severe necrotizing cellulitis was consistently observed microscopically along the cephalic and lateral line canals in conjunction with positive fungal cultures for Fusarium sp. Molecular phylogenetic analysis was performed from 3 isolates based on the nucleotide sequences containing internally transcribed spacer (ITS) and a portion of 5.8S and 28S rDNA. The fungus was highly homologous (100%) and closely related to F. solani species complex 2 (FSSC 2), which belongs to Clade 3 of the FSSC. Our results illustrate the histopathological findings and expand upon our knowledge of the prevalence of invasive fusariosis in the head and lateral line system of hammerhead sharks.


KEY WORDS: Fusarium solani species complex 2 · Invasive fusariosis · Lateral line system · Sphyrna lewini


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Cite this article as: Pirarat N, Sahatrakul K, Lacharoje S, Lombardini E, Chansue N, Techangamsuwan S (2016) Molecular and pathological characterization of Fusarium solani species complex infection in the head and lateral line system of Sphyrna lewini. Dis Aquat Org 120:195-204. https://doi.org/10.3354/dao03028

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