Zoology Department, College of Science, King Saud University, P. O. Box 2455, Riyadh, 11451, Saudi Arabia,
Parasitol Res. 2014 Apr;113(4):1361-70. doi: 10.1007/s00436-014-3775-2. Epub 2014 Feb 2.
A new Myxozoa, Kudoa quraishii n. sp., is reported in the striated muscle of the Indian mackerel Rastrelliger kanagurta from the Red Sea and the Arabian Gulf in Saudi Arabia. Mean prevalence of infection is about 20% and varies between localities. The parasite develops whitish and oval or rounded pseudocysts of 0.2-3 mm in the striated muscles of the body. Pseudocysts are filled with mature spores. Myxospores are quadrate in shape in apical view with rounded edges and ovoid in side view. Each spore is formed by four equal shell valves and four symmetrical polar capsules. Polar capsules are pyriform in apical view and drop-like in side view. Myxospore measurements in micrometers are 6.14 (5.9-6.34) in width, 5.48 (5.3-5.71) in thickness, and 4.27 (4.1-4.42) in length. Polar capsule measurements in apical view in micrometers are 2.08 (1.88-2.28) and 1.31 (1.10-1.52) length by width. Molecular analysis based on SSU rDNA gene shows closest association with K. amamiensis and K. kenti with respectively 98 and 97.2% of similarities.
一种新的 Myxozoa，Kudoa quraishii n. sp.，在沙特阿拉伯红海和阿拉伯湾的印度鲭鱼 Rastrelliger kanagurta 的横纹肌中被报道。感染的平均流行率约为 20%，并在不同地区有所差异。寄生虫在身体的横纹肌中发育成白色的椭圆形或圆形假囊，大小为 0.2-3 毫米。假囊内充满成熟的孢子。在顶端视图中，Myxospores 呈方形，边缘圆润，在侧视图中呈卵形。每个孢子由四个相等的壳瓣和四个对称的极囊组成。在顶端视图中，极囊呈梨形，在侧视图中呈滴状。Myxospore 的测量值以微米为单位，宽度为 6.14（5.9-6.34），厚度为 5.48（5.3-5.71），长度为 4.27（4.1-4.42）。在顶端视图中，极囊的测量值以微米为单位，长度分别为 2.08（1.88-2.28）和 1.31（1.10-1.52），宽度为长度的两倍。基于 SSU rDNA 基因的分子分析显示与 K. amamiensis 和 K. kenti 的密切关联，相似度分别为 98%和 97.2%。
