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Showing 3 results for Khoshnood
S. Mosafer Khoorjestan , S. Khodabandeh , Z. Khoshnood ,
Volume 21, Issue 4 (1-2013)
Abstract
To study the effects of mercuric chloride on kidney and intestine tissue of Persian Sturgeon, Acipenser persicus fry, fish exposed freshwater contain 15 ppb of mercuric chloride and control group were kept in non polluted freshwater for 48 hours. Histological studies of the processed tissues showed marked histological alterations than the control group that exposed only to freshwater. The pathologic lesions of the kidney included severely epithelial cell necrosis, lesion of epithelial cells from the basement membrane in the proximal and distal tubules. Proximal tubule also showed inflammation and incorporation of brush borders. Decrease of lymphoid and hematopoietic tissue observed. Pathologic lesions of intestine tissue were showed the epithelial necrosis, shrinkages of secretory follicule, lesion of epithelial microvilli in intestine. Results showed that low concentration of mercuric chloride can pose undesirable alternation in Persian Sturgeon fry, an economic and endangered species of the Caspian Sea.
M. Zakeri Nasab, Sh. Jamili, S. Tootoonchi, Z. Khoshnood,
Volume 27, Issue 1 (5-2018)
Abstract
Shemaya (Alburnus chalcoides), Roach (Rutilus rutilus caspicus) and goldfish (Carassius auratus auratus) were belonging to the family Cyprinidae. The aim of this study was to observe the gastrointestinal tract of these fish. After the sampling, gastrointestinal tract and its accessory glands were taken and studied trough histological procedure using H&E staining. The age of the fish was 2 to 3 years old. Three examined species the digestive system was made up of esophagus and intestine and the accessory glands were liver and hepatopancreas around the intestine. Esophagus was short with small foldings compare to the intestine. The intestinal foldings were high and lanceolate in Roach, but round-tip in Shemaya and goldfish. The foldings have high density in anterior part of the intestine with minor differences between examined species. Goblet cells were observed in esophagus and intestine with higher density at posterior part of the intestine. Liver and hepatopancreas were close or apart from each other along the gastrointestinal tract. In conclusion, it has been observed that these three species has some common characteristics in digestive system structure with some species specific properties.
P. Parvin, Z. Khoshnood,
Volume 28, Issue 3 (9-2019)
Abstract
The aim of present study was to assess the susceptibility of vacuum packaging in prevention of microbial contamination of packaged fish fillets at Ahvaz market. In order to evaluate the microbial contamination of commercial shrimps at Ahvaz market, 8 common species has been used as follow: Penaeus semisulcatus, Penaeus indicus, Penaeus farfante, Penulirus homarus, Penaeus merguiensis, Parapenaopsis stylifra, Metapenaeus affinis, and Litopenaeus vanamei. For Identification of microbial contamination of sampled shrimps, the muscle tissue has been observed. Two bacterial family (Vibrionaceae and Streptococcaceae) including 2 genus and 3 species has been identified. The most abundant species was Streptococcus faecalis with frequency of 61.5% and the lowest frequent species was Vibrio alginolyticus (7.7%). No bacterial contamination has been detected in Penulirus homarus and Metapenaeus affinis. Penaeus farfante with the 4.5×103 contamination of Vibrio parahaemolyticus was the most contaminated species. In study of organs for detection of fungi, Penicillium expansum from Phylum Ascomycota, Family of Trichocomaceae has been detected. Due to the contamination of of studied specimens it should be noted that precise and continuous monitoring of possible pathogenicity of V. parahaemolyticus in order to evaluate the health risk of consuming sea food would be necessary.
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