Recursos de colección

Aquatic Commons (39.539 recursos)

The Aquatic Commons is a thematic digital repository covering the natural marine, estuarine /brackish and fresh water environments . It includes all aspects of the science, technology, management and conservation of these environments, their organisms and resources, and the economic, sociological and legal aspects.

Subject = Health

Mostrando recursos 1 - 20 de 20

  1. Isolation of some human pathogens from fresh and smoked shad

    Tavakoli, HR.; Soltani, M.; Bahonar, A.
    The consumption of sea-foods especially different kinds of fish has been increased in many countries such Iran in recent years (Akhonzade Basti et al 2006, Feldhusen, 2004). However, there is substantial evidence that fish and seafood are high on the list of foods associated with outbreaks of food borne diseases (Huss, 2003). Safety of fish products and their quality assurance is one of the main problems of food industry today. The presence or absence of foodborne pathogens in a fish product is a function of the harvest environment, sanitary conditions, and practices associated with equipment and personnel in the processing...

  2. Anticancer effect of Dunaliella salina under stress and normal conditions against skin carcinoma cell line A431 in vitro

    Emtyazjoo, Mo; Moghadasi, Z.; Rabbani, M.; Emtyazjoo, Ma; Samadi, S.; Mossaffa, N.
    Dunaliella salina, a green microalga, has been consumed as food and medicine for a long time. The anti-oxidant and anticancer effects are related to more production of β-carotene under stress conditions compared with normal circumstances.The scope of this study was survey of anticancer effect of the ethanol extract of Dunaliella salina algae under stress (EDSS) and normal (EDSN) conditions on death rate of skin carcinoma cell line A431 by MTT [3-(4,5-dimethylthiazol-2-y1)-2,5-diphenyltetrazolium bromide] method in vitro. Our results showed that the β-carotene amount in stress situation was 1.46 times more than in normal condition. The cytotoxic effect of EDSS exposed to...

  3. Ichthyotoxism in Capoeta capoeta gracilis (Keyserling, 1861) from west of Urmia (Marmisho Lake), Iran

    Ramin, M.; Shiri, S.; Doustdar, M.
    Fish egg poisoning is a public health hazard although usually the incident rate, mortality and fish species involved are not well reported (Halstead,1970). Four species of Cyprinidae in Iran have been suggested as ichthyotoxic by Coad (1979) .namely Abramis brama. Cyprinus carpio .Schizothorax zarudnyi and Tinca tinca and it was thought that other species may be discovered subsequently.Najafpour and Coad (2002) reported ichthyotoxin in the cyprinid Barbus luteus from Iran ,and the study records another species. The Cyprinid fish Capoeta capoeta known as Siah mahi or gara balig in Iran.

  4. Food borne bacterial pathogens in smoke-dried fish in Lagos markets

    Amusan, E.E.; Afolabi, O.O.; Babalola, A.F.; Oramadike, C.E.
    Fifty samples of smoked fish were obtained from some markets in Lagos and these were analyzed for the presence of Staphylococcus aureus, Vibrio sp. and Listeria monocytogenes. All the samples tested positive for Staphylococcus aureus, 27 samples for Vibrio sp. and none for Listeria monocytogenes. This study reveals that the smoked fish sold in Lagos, could be a potential source of food borne bacterial pathogens and thus the need for improvement in processing and handling are required.

  5. Heavy metals and sensory evaluation of canned tuna fish

    Babalola, A.F.; Olusola, A.O.; Akande, G.R.; Ezekiel, M.O.; Ozor, P.A.
    In this study, two heavy metals in canned tuna fish were determined after digestion by the AOAC methods. Mercury and Cadmium levels in canned tuna fish were determined by flame atomic absorption photometry. The results of this study indicate that canned tuna fish imported into the country have concentrations well below the petmissible FAO/WHO levels for these toxic metals. Their contribution to the body burden can therefore be considered negligible and the fish seem to be safe for human consumption. For the sensory evaluation, tuna flakes in vegetable oil (Starkist) from Ghana and light meat tuna chunks in sunflower oil...

  6. Short communication: Morphological and genetic characterisation of selected Contracaecum (Nematoda: Anisakidae) larvae in Iran

    Shamsi, S.; Aghazadeh-Meshgi, M.
    In their life cycle, Contracaecum spp infect marine mammals and piscivorous birds as definitive hosts and crustaceans and a wide range of fish species as their intermediate hosts. Humans can accidentally be infected with larval stages of these nematodes, leading to a severe disease generally known as anisakidosis. The disease now is considered as an emergence zoonotic disease and therefore, these parasites attracted attention of scientists in different parts of the world and various aspects of their biology and lifecycle is being investigated. In Iran, there is a paucity of information on these socioeconomically important parasites. The present study is...

  7. In vitro effect of nanosilver toxicity on fibroblast and mesenchymal stem cell lines

    Shahbazzadeh, D.; Ahari, H.; Motalebi, A.A.; Anvar, A.A.; Moaddab, S.; Asadi, T.; Shokrgozar, M.A.; Rahman-Nya, J.
    Nanotechnology presents countless opportunities to develop new and improved consumer products for the benefit of the society . A most prominent nanoproduct is nanosilver. Nanosilver particles are generally smaller than 100 nm and contain 20–15,000 silver atoms. Despite the wide application of nanomaterials, there is a serious lack of information concerning their impact on human health. In the previous study we reported the cytotoxic of nanosilver on osteoblast G292 cancer cell line and the amount of IC50 determined as 3.42 µg/ml (Moaddab et al., Iran. Nano Lett., Vol. 1, No. 1, January 2011, pp. 11-16). The purpose of the present...

  8. Bioaccumulation and carbohydrate levels of Tilapia zillii exposed to sublethal concentrations of lead and copper

    Moody, F.O.; Akinwande, A.A.; Ibrahim, M.
    Tilapia zilili is a commonly cultured fresh water fish and of major economic importance in tropical and subtropical countries throughout the world. Effect of the sub lethal concentrations of copper and lead to T. zillii for 12-week exposure period was carried out. The elements were assayed using Shimadzu AA 6200 atomic absorption spectrophotometery and the results were given as ~k/g dry wt.The bioaccumulation factors of lead and copper were significantly (P<0.05) higher in treated fishes than the control. Effect of these metals on the quantitative carbohydrate levels in the plasma, muscle and liver were observed. The different concentrations of the...

  9. Construction of vaccine from Lactococcus lactis bacteria using Aeromonas hydrophila virulent aerolysin gene

    Sasan, H.; Abd Rahim, Raha; Hai Ling, Foo; Radu, Son; Mohd Davoud, Hassan
    In this study the forward and reverse primers were designated to amplify the segments (~250 bps and ~650 bps) of the gene coding domains 1 and 4 of aerolysin of Aeromonas hydrophila. These two domains are involved in pathogenesis of the aerolysin gene. Sequences for two restriction enzymes, Pst I and Hind III, were included in the forward and reverse primers respectively. These restriction enzyme sites were used because they are not present within the genes of interest but are available in the multiple cloning sites of plasmid pNZ8048. Amplified PCR products were analyzed with 1% agarose gel electrophoresis and...

  10. Antimutagenic activity of chloroformic and methanolic extracts of muscle, liver and cartilage of Sphyrna lewini with the Ames test

    Samadi, S.; Emtyazjoo, M.; Khanipour, A.A.; Moghadasi, Z.; Nazarhaghighi, F.
    For this study one species of Shyrnidae family caught along Persian Gulf in Bandarabbas city. Sphyrna lewini were transferred to the laboratory on spring 2007. The antimutagenic activity of the Methanolic and Chloroforamic extracts of muscle, liver and cartilage of Sphyrna lewini with the Ames test was investigated. The use of antimutagens and anticarcinogens in everyday life is the most effective procedure to prevent human cancer and genetic diseases. Since angiogenenesis is a key factor in tumor growth, inhibiting this process is one way to treat cancer. In this study the antimutagenic effect of the Chloroformic and Methanolic extracts of...

  11. Effect of environmental factors on coastal fisheries

    Edema, C.U.
    Factors which threaten sustainable commercial fisheries are considered in this paper. Oil and grease, suspended solids, overfishing impact on fishes and fisheries. Whereas overfishing declines adult fish values; the duo of oil and suspended solids clog and disable gills of affected fishes and deplete insolation. And barnacles foul boats.

  12. Use of screened fish retail table to improve the hygiene of fish sold in local markets

    Adebayo, M.A.; Babalola, T.O.; Olokor, J.O.
    Screened retail table was designed to improve the hygiene of fish sold in our local markets. Investigation was carried out on the microbiological population on Tilapia fish. Overall value obtained from plate counts show that fish were more infested outside the table. The sensory values are 4, 13, and 6 for on-sport open table and screened respectively, also microbial load range between 7x10-5 to 88 x 10-5 cfu/g for open table where 3x 10-10 - 33 x 10-10 for screened table. This shows that fresh fish on open retail table in our markets were prone to deterioration.

  13. Fish safety and quality: sources of contamination and hygiene indicators in fresh and processed fish

    Ihuahi, J.A.; Olokor, J.O.; Omojowo, F.S.
    The knowledge of sources and routes of fish contamination is a very important aspect in maintaining the quality of safety of fish. This is paramount because the sources constitute the acess through which most unwanted microorganisms may be transmitted onto fish and fishery products. Unwanted microorganisms may be found in the final product through raw material, personal handling or mobile equipment such as forklifts, through leakage and openings in building, or through pests. Some pathogens may even become established in the processing equipment and rough contact surfaces such as fish retail tables and from niches where they can survive for...

  14. Study of some hematological and biochemical parameters of rainbow trout (Oncorhynchus mykiss) fry in western part of Mazandaran province, Iran

    Zorriehzahra, M.J.; Hassan, M.D.; Gholizadeh, M.; Saidi, A.A.
    This study was done to investigate of some hematological and biochemical factors of rainbow trout (Oncorhynchus mykiss ) fry in west of Mazandaran in Iran. About 50 pools of blood samples from diseased fry were collected within 30 months from November 2002 till March 2005 from three hatchery farms in western part of Mazandaran province. In addition 30 pools of blood samples as control group were collected randomly from mentioned farms. Each blood samples were examined for whole blood examination and blood enzymes measurement. It consist of total leukocytes (WBC) and erythrocytes counts (RBC), hemoglobin (Hb) content, hematocrits (PCV), leukocytes...

  15. Case studies on HIV/AIDS in fisheries development: lessons for Nigerian fisheries

    Olowosegun, T.; Ovie, S.I.; Sanni, O.A.; Sule, A.M.; Bwala, R.I.; Olowosegun, O.M.
    This paper reviews accounts of social and economic features of HIV/AIDS epidemics in the fisheries sector focussing on Africa with particular reference to Nigeria. Fishing communities are often among the highest-risk group, with high overall rates of HIV/ AIDS prevalence. It is more important to use the information made available from these efforts in more effective way of targeting the appropriate interventions and measures that can be designed and instituted. This information could also serve useful purposes and the efficient mobilization of needed resources from all possible sources in order to achieve the Millennium Development Goals in the Fisheries sector...

  16. Metal composition of Clarias gariepinus consumed in Makurdi and its environs

    Ayuba, V.O.; Adadu, M.O.
    A study was conducted to determine the concentrations of nine heavy Metals (Cadmium, lead.Copper, Chromium, Iron, Zinc, Selenium, Nickel and Aluminum) in gills, muscles and skin of Clarias gariepinus within three different locations (Kuatansule, Wadata and UAM fish) with the use of standard flame Atomic Absorption Spectrophotometry Techniques. Iron was found in high concentration in all the sites with the gills having the highest concentration while lead. Cadmium, Selenium, Nickel and Aluminum were not detectable. Significant differences in metal concentrations were observed between locations with UAM fish farm having the highest metal concentration. It is concluded that concentration, of heavy...

  17. Effect of different concentrations of bonny-light crude oil on alanine kinase and alanine transaminase enzyme activities in Heterobranchus bidorsalis juveniles

    Ugwu, L.L.C.; Nwamba, H.O.; Mgbenka, B.O.
    The effect of exposing juveniles of Heterobranchus bidorsalis (Geoffroy St. Hilaire, 809) (mean weight: 15.02~c:0.14g) to different concentrations of Bonny-light crude oil (BLCO) on alanine kinase and alanine transaminase activities were studied. The exposure of the fish to 1.00, 2.00, 4.00, 8.001L-1 BLCO and a control (0.00m1 L-1) within 4 days toxicity and 42 days recovery periods indicated that the significant increases (P<0.05; P<0.01) in the serum alanine transaminase (HCAT) activities were dependent on the BLCO concentrations. The reduced SAK and (HCAK) activities noticed within the first 14 days recovery period implied that the removal of the oil pollutant probably...

  18. Effects of crude oil and the fractions on the blood haemoglobin and neutrophil concentrations in Heterobranchus bidorsalis juveniles

    Ugwu, L.L.C.; Nwamba, H.O.; Mgbenka, B.O.
    Studies on the effects of crude oil and its fractions on the blood haemoglobin (HB) neutrophil (NP) concentration in the blood of Heterobranchus bidorsalis juveniles were carried out. Two study periods (toxicity and recovery) and four oil types (Bonny-light crude oil (BLCO), premium motor spirit (PMS), kerosene (DPK) and lubricating engine oil (lBO) at 1.00, 2.00, 4.00 and 8.00ml were used. There were significant differences (P<0.05, p< 0.01) on the HB and NP values in blood of fish samples. The elevated values of HB levels in fish exposed to 2.00,4.00 and 8.00m1 L-1 BLCC, 2.00ml L-1 PMS and DPK; and...

  19. Public health implications of Gurara River around Izom environs, Niger State, Nigeria

    Adama, S.B.; Kolo, R.J.
    Water samples were collected from River Gurara around the Gurara Falls and Izom settlement once every month for a period of twelve (12) months (June 2004 May 2005). Microbial studies were carried out on the water samples collected. There were marked variations between different samples, stations and seasons. The microbial studies showed the presence of enteric gram negative, gram positive and pyogeric groups of bacteria. Some species of indicator organisms were recorded. The results obtained showed that the activities of Izom populace has some impact on the water quality and public health status of River Gurara

  20. Investigation of antibacterial and antifungal activities of the extract marine algae Sargassum glaucescens

    Amirsharifi, M.; Jamili, Sh.; Larijani, K.; Mashinchian Moradi, A.; Amini, K.
    In recent decades the use of algae in the food and pharmaceutical industries is of great importance. The antimicrobial activity of brown alga methanol, ethyl acetate, hexane, and chloroform extracts on bacteria gram positive, gram negative, and fungi was evaluated by using nutrient broth macrodilution test. Sargassum glaucescense was collected around the coastal waters of Chabahar (Oman Sea) in Nov and Dec 2015. Six pathogenic organisms including; Enterococcus faecium ATCC 51299, Streptococcus mutans ATCC 35668, Shigella boydii ATCC 25923, Pseudomonas aeruginosa ATCC 27853, Klebsiella pneumoniae ATCC 13883, Salmonella enteritidi PTCC, 1709, Candida albicans ATCC 10231 and Aspergillus fumigatus PTCC 5009...

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