Centrocestus formosanus: surface morphology of metacercaria, adult and egg

Journal of Helminthology
T SrisawangwongP Sithithaworn

Abstract

The surface morphology of metacercariae isolated from Puntius spp., adult worms from infected hamsters and eggs of Centrocestus formosanus (Digenea: Heterophyidae) were studied using scanning electron microscopy. It was found that the surfaces of the metacercariae and adult worms were closely similar in appearance. The oral sucker was surrounded by a circumoral expansion with two rows of 32 spines (16 spines each). The ventral sucker, with six large nonciliated papillae on the lip, and the genital opening were located mid-ventrally. The excretory pore was terminal. The body surface was covered with pectinate scale-like spines of varying sizes. The scales in the middle area were larger than those in the anterior and posterior parts of the body. Sensory papillae, mostly uniciliated, were present in greater abundance at the anterior region of both stages. However, morphological variations were observed among the adults depending on the age of the worms. At 4 weeks, the oral sucker and circumoral expansion were cobblestone-like in structure and the grooves of spines split compared with their smooth surfaces at 10 days. In addition, the ventral sucker became depressed and its large papillae on the lip disappeared at 10 weeks post in...Continue Reading

References

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Citations

Mar 24, 2000·Parasitology International·J Abdul-SalamH Ashkanani
Aug 4, 2006·The Journal of Parasitology·Susana Balmant Emerique SimõesCláudia Portes Santos
Apr 9, 2013·Revista Do Instituto De Medicina Tropical De São Paulo·Vitor Luís Tenório MatiAlan Lane de Melo
Jul 13, 2011·Revista Do Instituto De Medicina Tropical De São Paulo·Hudson Alves Pinto, Alan Lane de Melo
Mar 18, 2008·The Korean Journal of Parasitology·Eun Taek HanJong Yil Chai
Jun 20, 2003·The Korean Journal of Parasitology·Woon-Mok SohnJong-Yil Chai
Jun 14, 2000·Systematic Parasitology·J Abdul-Salam, B S Sreelatha
May 28, 2021·Diseases of Aquatic Organisms·Afaf Abdullah Al-SalemElsayed M Bayoumy

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