scholarly journals Diversity of Listeria monocytogenes Strains Isolated from Food Products in the Central European Part of Russia in 2000–2005 and 2019–2020

Foods ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2790
Author(s):  
Ekaterina K. Psareva ◽  
Elena A. Liskova ◽  
Irina V. Razheva ◽  
Yulia K. Yushina ◽  
Maria A. Grudistova ◽  
...  

Totally, 45 L. monocytogenes strains isolated from meat, poultry, dairy, and fish products in the Central European part of Russia in 2001–2005 and 2019–2020 were typed using a combined MLST and internalin profile (IP) scheme. Strains belonged to 14 clonal complexes (CCs) of the phylogenetic lineages I and II. Almost half of the strains (20 of 45) belonged to six CCs previously recognized as epidemic clones (ECs). ECI and ECV strains were isolated during both studied periods, and ECII, ECIV, ECVI, and ECVII strains were isolated in 2001–2005, but not in 2019–2020. ECI, ECIV, ECV, and ECVII strains were isolated from products of animal origin. ECII and ECVI were isolated from fish. Testing of invasion efficiencies of 10 strains isolated in different years and from different sources and belonging to distinct CCs revealed a statistically significant difference between phylogenetic lineage I and II strains but not between ECs and non-EC CCs or strains differing by year and source of isolation. Strains isolated in 2001–2005 were characterized by higher phylogenetic diversity and greater presentation of ECs and CCs non-typical for natural and anthropogenic environments of the European part of Russia comparatively to isolates obtained in 2019–2020.Closing of the Russian market in 2019–2020 for imported food might be responsible for these differences.

Zootaxa ◽  
2019 ◽  
Vol 4576 (2) ◽  
pp. 347
Author(s):  
ALEXEY V. SHAVRIN ◽  
EDUARD A. KHACHIKOV

New taxonomic, morphological and faunistic data for three Western Palaearctic species of the genus Acrolocha Thomson, 1858 are provided. Acrolocha caucasica Tóth, 1976 is redescribed and illustrated. The lectotype for A. pliginskii Bernhauer, 1912 is designated. Acrolocha amabilis (Heer, 1841) is recorded from Central European part of Russia and Georgia for the first time. 


2020 ◽  
pp. 171-178
Author(s):  
Evgeniy Nikolayevich Sechin ◽  
Oleg Anatolyevich Marakaev ◽  
Gavriil Borisovich Gavrilov

For the first time, the phytosterol state of the underground and aboveground organs of the tuberoid species of the orchid Dactylorhiza maculata (L.) Soó (Orchidaceae), which grows in the natural conditions of the Central European part of Russia, was studied using gas chromatography with a mass spectrometric detector. The plant material contains cycloartenol, cycloeukalenol, campesterol, brassicasterin, β-sitosterol, stigmasterol and ergosterol, which was found in underground organs and belong to mycosymbiont. The ergosterol content in the adventitious roots is five times higher compared to the endings of stem root tuberoids. The phytosterols content of the aboveground organs of D. maculata is more diverse than that of the underground organs. The basic sterol of D. maculata is β-sitosterol (60%), which is present in all organs. Also a high amount was noted for cycloartenol (20%), which is absent in the stem. Cycloeukalenol (7%) was found in inflorescences and leaves, campesterol (2%) in inflorescences, brassicasterin (5%) in the adventitious roots, stigmasterol (5%) in the leaves. Differences in the sterol statuses of organs can be explained by the biochemical characteristics of their tissues and the uneven functional significance of the identified compounds for the growth and development of generative individuals of D. maculata in the budding phase. The results obtained indicate the diversity of phytosterol compounds and their uneven content in various organs of the studied plant object.


2008 ◽  
Vol 42 ◽  
pp. 252-265
Author(s):  
N. A. Konstantinova ◽  
G. A. Bogdanov ◽  
A. N. Savchenko

Bolshaya Kokshaga Nature Reserve is situated at the Middle Bolshaya Kokshaga River (the left tributary of the Volga River). Its area covers 21400 hectares, elevation ranges from 40 up to 160 m a. s. l. The compiled annotated list counts 50 hepatic species and 1 hornwort species including several rare species in the central European part of Russia (Cephaloziella elachista, Geocalyx graveolens, Odontoschisma denudatum) and 2 ones red listed in Europe (Frullania bolanderi, F. inflata). Ecology and some phytosociological peculiarities of the species are described. A comparison with the hepatic flora of Kerzhenskiy Nature Reserve is provided.


Heliyon ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. e06432
Author(s):  
M.V. Gryaznova ◽  
S.A. Solodskikh ◽  
A.V. Panevina ◽  
M.Y. Syromyatnikov ◽  
Yu.D. Dvoretskaya ◽  
...  

2020 ◽  
Vol 90 (5) ◽  
pp. 493-508
Author(s):  
Sandeep K. Sharma ◽  
◽  
Rahul Yadav ◽  
Sharat C. Mehta ◽  
Anil K. Kataria

In consideration of the importance of Staphylococcus aureus regarding its contribution to antibiotic resistance, the present study was designed to find variability among S. aureus isolates in relation to their multidrug resistance patterns. A total of 157 species-specific 23S rRNA based confirmed S. aureus isolates from various clinical and non-clinical animal sources (cattle, buffalo, goat, sheep, dog, camel, pig and horse), human and pieces of meat from butcher shops were included in the present study. Overall more than 95% isolates were recorded resistant to ampicillin and penicillin-G, while approximately 100% isolates were sensitive to chloramphenicol, meropenem and nitrofurantoin. The isolates from different sources showed highly significant (P≤0.01) variation in their resistance patterns for 39 antibiotics, significant variation (p≤0.05) for levofloxacin and nitrofurantoin, and no significant variation (P>0.05) for clindamycin. In Bonferroni correction, human isolates were significantly variable with a p˂0.0001 probability level of variance in relation to other pieces of meat and animal origin sources for most of the antibiotics. Human isolates had the highest (0.40) MAR index. A highly significant difference was observed in the antibiogram pattern between different sources of S. aureus, which may indicate the pattern and frequency of use of various antibiotics in humans and animals.


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