Investigation of Nematopsis spp. oocysts in 7 species of bivalves from Chonburi Province, Gulf of Thailand

Diseases of Aquatic Organisms

C. Tuntiwaranuruk¹  C. Azevedo¹  M. Kruatrachue¹  K. Chalermwat¹  E. S. Upatham¹ 

关键词: Nematopsis;    Disease;    Protozoa;    Apicomplexa;    Bivalve;    Thailand;   

DOI  :  10.3354/dao058047

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: This is the first detailed report of Nematopsis spp. in Thai bivalves. A monthly survey was conducted on 7 species of commercial bivalves from Chonburi province, on the eastern seaboard of Thailand, from November 2000 to November 2001 toinvestigate the prevalence of the apicomplexan parasite Nematopsis Schneider, 1892. Nematopsis spp. sporozoites were found in the cultivated bivalves Arcuatula arcuatula, Anadara granosa and Pernaviridis as well as the locally harvested Paphia undulata. They were not found in Donax faba, Meretrix meretrix or Saccostrea cucullata. Using light microscopy, we were able to identiby 4oocyst morphotypes of the gregarine Nematopsis spp. Prevalence of Nematopsis spp. during the 13 mo sampling period was highest in A. arcuatula (91.8%; n = 110) and lowest in A. granosa (59.2%; n = 130). The morphology of theoocysts differed between hosts, with an average (x ± SD) length/width of 16.28 ± 0.64/12.01 ± 0.35 µm (n = 50) for A. arcuatula, 16.90 ± 0.71/12.69 ± 0.33 µm (n = 50) for A. granosa, 17.61 ± 0.69/12.72 ± 0.36 µm (n = 50)for P. viridis, and 11.21 ± 0.62/8.55 ± 0.52 µm (n = 50) for P. undulata. Identification of oocysts of these apicomplexan gregarines to species was not attempted. The prevalence of infection in relation to habitat and time ofsampling is discussed.

【 授权许可】

Unknown