Clearance of a dermal Huffmanela sp. in a sandbar shark (Carcharhinus plumbeus) using levamisole

Diseases of Aquatic Organisms

Robert A. MacLean Michael H. Fatzinger Kevin D. Woolard Craig A. Harms¹ 

关键词: Parasitic nematode;    Huffmanela;    Carcharhinus;   

DOI  :  10.3354/dao073083

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: A wild-caught captive sandbar shark Carcharhinus plumbeus developed a contiguous network of darkly pigmented linear tracks that progressed from the snout to the ventral cervical region. Microscopic examination of a skin scraping revealed nematode eggs of the genus Huffmanela, a group of histozoic nematodes that is known to parasitize requiem sharks and marine and freshwater teleosts. The fresh eggs were darkly pigmented with bipolar plugs, contained a larva, and measured 73.3 to 86.4 by 39.0 to 47.4 µm (n = 10). Formalin-fixed and paraffin-embedded eggs were significantly smaller (Wilcoxon rank sums test, p < 0.005), measuring 70.5 to 78.9 by 33.6 to 41.3 µm (n = 13). These measurements do not correlate with previously reported species of Huffmanela. Serial treatment with levamisole (10 mg kg^–1, intramuscular [i.m.]) cleared the egg tracks within 21 d, with no recurrence or apparent complications.

【 授权许可】

Unknown