R.S. Arakelyan1, Yu.B. Salina2, A.P. Kalmykov3, V.A. Irdeeva1, E.Yu. Shipilova4, S.V. Eremeeva4, A.A. Glebova5
1Astrakhan State Medical University,
2State Center of Agrochemical Service” Astrakhan,
3Astrakhan Order of the Red Banner of Labor State Natural Biosphere Reserve,
4Astrakhan State Technical University,5Regional Drug Dispensary
The purpose of the study: to analyze the parasitic purity of fish and fish products studied in the laboratory of FSU CAC “Astrakhan” for 2015-2018.
Materials and methods. A study of 40 species of fish was conducted, 693 studies on parasitic purity were performed. The percentage of unsatisfactory samples was 4.8% (33 samples).
Research result. For research on parasitic purity were delivered fish 12 groups: herring-7.4%, sturgeon-8.4%, perch-16.6%, carp-49.5%, stavrid-0.1%, salmon-4.6%, pike-8.1%, catfish-4.0%, cod-0.3%, smelt-0.7%, mackerel-0.1%. In addition to fish products, 2 samples of seafood were delivered-0.3%.
In most cases, samples of frozen fish were delivered for research – 34.9% (242 samples). The percentage of unsatisfactory samples of frozen fish was 9.1% (22 samples). In addition to frozen and chilled fish, samples of cold and hot smoked fish were delivered for research. Thus, 7 samples (1.01%) of hot smoked fish were delivered. In all cases, the result of the study is negative.
Also, 73 samples (10.5%) of dried fish were examined, of which 2 samples (2.7%) did not meet sanitary and parasitological standards.
In addition to various fish samples, fish products and fish products were delivered for research. Thus, the caviar production was studied-55 samples (7.9%), the percentage of unsatisfactory samples was 1.8% (1 sample) – a dead larva of Anisakis simplex was found in a sample of salmon caviar (chum). In all other cases, the result of parasitological research is negative.
Summary. The most frequently positive findings were observed in frozen (34.9%) fish – metacercaria Rossicotrema donicum, Apophallus muehlingi and Posthodiplostomum cuticola and chilled (22.5%) fish- metacercaria Rossicotrema donicum and Apophallus muehlingi. In most cases (97%) in fish in the muscle and subcutaneous tissues were found metacercariae trematodes, dressed with black pigment. Metacercariae A. muehlingi were most often found in cyprinid fish (75.8%), and metacercariae R. donicum – in perch breeds (18.2%); in isolated cases – in pike (0.1%) were found metacercariae P cuticola. Metacercariae were found in predatory fish (pike perch-15.2% and ASP-12.1%), as well as fish that live at the depth of reservoirs (bream-27.3% and tench-18.2%). The presence of A. simplex larvae in the caviar of salmon fish indicates poor- quality products of this type of canned food.
Keywords: fish andfish products, sanitary-parasitological study, metacercariae of trematodes, anisakidae