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International Journal of HIV and AIDS research
International Conference on
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Sexually Transmitted Diseases, AIDS and Parasitic Infections
Parasitology, Infectious Diseases, STDs and STIs
September 21-22, 2017 San Antonio, TX, USA
Redescription and ultrastructural study on Hexangium sigani Goto and Ozaki, 1929
from three different Siganus spp. fishes from red sea, Egypt
Refaat M Khalifa1, Hemely Abdel-shafy Hassan2, Hoda saady Mohamadain2 and Yasser Farhat Mahmoud Karar 2
1Assiut University, Egypt
2South Valley University, Egypt
Siganus rivuatus, Siganus luridu and Siganus sutor are common fishes in the red sea. In our study and during
a survey of red sea fish parasites (exactly in the region of Northern Red Sea, Of Sharm El-Naga, Makadi Bay,
Southern Hurghada, Egypt) 94 fishes were examined (70 Siganus rivuatus, 8 Siganus luridu and 16 Siganus sutor)
by routine Parasitology methods. 48 out of 94 fish were found to be naturally infected by Hexangium sigani Goto
and Ozaki, 1929 (44 Siganus rivuatus, two Siganus luridu and two Siganus sutor ). The encountered parasites
were described morphologically and morphometrically by means of light and scanning electron microscopy The
previous comparison among all described forms of H. sigani revealed some morphological variations confined
between; absence or presence of tegumental spines, testes arrangement and larger or smaller of body dimensions
and ovary size. These differences are considered to be of minor importance. The present study using SEM
revealed presence of one main tegumental structures, sensory papillae, which are differentiated into three forms;
oral papillae, genital papillae and body papillae. Each form exhibited a moderately wide range of variations both
in size and in distribution. The presence of different types of sensory papillae on different locations over body
tegument of H. sigani may reflect a variation in the functions they performed. SEM study of this parasite was
done for the first time in Egypt with addition of many ultrastructural details; most of which are of taxonomical
importance. Also, for the first time, Siganus luridus represented a new hos record of H. sigani.