Occurrence of tumour (odontoma) in marine fish Sphyraena jello from the southeast coast of India.
We examined the occurrence of odontoma in the marine fish Sphyraena jello sourced from 3 different landing centers (Cuddalore, Parangipettai and Nagapattinam) in Tamil Nadu (southeast India). A total of 19783 fishes were examined for odontoma presence, of which 2393 were affected with odontoma. The overall prevalence was 12.1% among the 3 stations. Fish landed at Parangipettai showed the highest peak prevalence of odontoma (16.8%) during the pre-monsoon, followed by Nagapatinam (9.1%) during summer 2011. The tumour lengths in premaxilla, supermaxilla and dentary bone were 1.1-3.6, 1.4-5.9 and 1.2-4.1 cm, respectively, and tumour widths were 0.3-1.9, 0.7-3.1 and 0.5-1.9 cm. Higher prevalence (0.206%) of tongue tumour along with odontoma was observed at Nagapattinam whereas it was lower (0.162%) at Cuddalore. Odontoma histopathology showed dense fibrous tissue with fine teeth roots. TEM analysis showed virus-like particles associated with odontoma. Radiography of the odontoma showed that the tumour masses were bony in nature and tissues were merged with upper and lower jaw.
Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai, Tamil Nadu, India.
R
R
Vijayakumar
A
A
Gopalakrishnan
K
K
Raja
K
K
Sinduja
D000818:Animals; D005393:Fish Diseases / Q000453:epidemiology* / Q000473:pathology; D007194:India / Q000453:epidemiology; D019156:Indian Ocean / Q000453:epidemiology; D009062:Mouth Neoplasms / Q000453:epidemiology / Q000473:pathology / Q000662:veterinary*; D009810:Odontoma / Q000453:epidemiology / Q000473:pathology / Q000662:veterinary*; D010473:Perciformes