АНАЛИЗ ДИНАМИКИ ЗАРАЖЕННОСТИ КЛЕЩЕЙ БАБЕЗИЯМИ НА ТЕРРИТОРИИ КИРОВСКОЙ ОБЛАСТИ

Objective of research: To study the spread of causative agents of babesiosis in ticks collected on the territory of the Kirov region with the use of molecular-genetic methods. Materials and methods: In this paper, the method of molecular-genetic detection of genetic material of the pathogen in the sample was used (the method of polymerase chain reaction (PCR). Ticks were collected from vegetation cover as well as from people and domestic animals (dogs, cats). Ticks were estimated according to identification tables. Causative agents of babesiosis were determined by the extraction of total nucleic acids from each tick; all ticks were examined using PCR. Total DNA extraction from ticks stored in 70% ethyl alcohol was performed with the use of guanidine thiocyanate. The proportion of ticks infected with Babesia was determined depending on the year, collection area on the territory of the Kirov region, species and sexual belonging of ticks. Results and discussion: It was found that the major tick vectors of Babesia on the territory of the Kirov region are ticks Ixodes persulcatus . In addition, two other tick species Dermacentor reticulatus and I. ricinus were detected in that region. It was shown, that the rate of Babesia infection in ticks Ixodes persulcatus was higher than in D. reticulatus and I. ricinus . The average percentage of ticks infected with Babesia was 53,07 %. A gradual increase of percentage of infected individuals with the maximum value 73,2 % was registered in 2012. However, in the following year, a significant decrease (51,7 %) was reported, and the minimum number of ticks infected with Babesia was observed in 2014 (37,4 %). A significant increase in infestation of ticks was newly observed in 2015 (50,4 %). It was found that male and female ticks are equally likely to be vectors for Babesia. Infection rates in male and female ticks were 54,5 and 49,3 %, respectively. Fluctuations in the number of infected ticks depending on the year (maximum in 2012 and minimum in 2014) were determined. Ticks from South-West districts of the region are mostly infected with Babesia. In the city of Kirov, 55,8 % of ticks are infected with Babesia in spite of acaricide treatment.Цель работы - изучить распространение возбудителей бабезиоза у клещей на территории Кировской области. Материалы и методы. Сбор клещей проводили с растительного покрова, а также с людей и домашних животных (собак, кошек). Клещей идентифицировали по определительным таблицам. Наличие возбудителей бабезиоза определяли при исследовании суммарных нуклеиновых кислот, выделенных из каждого клеща, с последующей постановкой ПЦР. Суммарную ДНК экстрагировали с помощью гуанидинтиоизоцианатного метода из клещей, фиксированных в 70%-ном этиловом спирте. Определяли процент зараженных бабезиями клещей в зависимости от года, района сбора на территории Кировской области, видовой и половой принадлежности. Результаты и обсуждение. Установлено, что основным видом клещей - переносчиков бабезиоза на территории области является Ixodes persulcatus . Также были обнаружены клещи Dermacentor reticulatus и I. ricinus . Показано, что зараженность клещей I. persulcatus оказалась выше, чем D. reticulatus и I. ricinus . Средняя доля клещей, зараженных бабезиями, составила 53,07 %. Установлено постепенное повышение процента зараженных особей с максимумом в 2012 г. (73,2 %). Однако, уже в следующем году отмечен значительный спад (51,7 %), а минимальное число зараженных клещей наблюдали в 2014 г. - 37,4 %. В 2015 г. вновь отмечали значительный рост зараженности клещей (50,4 %). Самцы и самки в равной степени могут быть переносчиками бабезий. Зараженность самок и самцов бабезиями составила соответственно 54,5 и 49,3 %. Установлены колебания численности зараженных клещей в зависимости от года (максимум - в 2012 г. и минимум - в 2014 г.). Клещи юго-восточных районов области заражены бабезиями в наибольшей степени. На территории города Кирова клещи на 55,8 % заражены бабезиями, несмотря на акарицидные обработки

Indian summer monsoon onset forecast skill in the UK Met Office initialized coupled seasonal forecasting system (GloSea5-GC2)

Accurate and precise forecasting of the Indian monsoon is important for the socio-economic security of India, with improvements in agriculture and associated sectors from prediction of the monsoon onset. In this study we establish the skill of the UK Met Office coupled initialized global seasonal forecasting system, GloSea5-GC2, in forecasting Indian monsoon onset. We build on previous work that has demonstrated the good skill of GloSea5 at forecasting interannual variations of the seasonal mean Indian monsoon using measures of large-scale circulation and local precipitation. We analyze the summer hindcasts from a set of three springtime start-dates in late April/early May for the 20-year hindcast period (1992-2011). The hindcast set features at least fifteen ensemble members for each year and is analyzed using five different objective monsoon indices. These indices are designed to examine large and local-scale measures of the monsoon circulation, hydrological changes, tropospheric temperature gradient, or rainfall for single value (area-averaged) or grid-point measures of the Indian monsoon onset. There is significant correlation between onset dates in the model and those found in reanalysis. Indices based on large-scale dynamic and thermodynamic indices are better at estimating monsoon onset in the model rather than local-scale dynamical and hydrological indices. This can be attributed to the model's better representation of large-scale dynamics compared to local-scale features. GloSea5 may not be able to predict the exact date of monsoon onset over India, but this study shows that the model has a good ability at predicting category-wise monsoon onset, using early, normal or late tercile categories. Using a grid-point local rainfall onset index, we note that the forecast skill is highest over parts of central India, the Gangetic plains, and parts of coastal India - all zones of extensive agriculture in India. El Niño Southern Oscillation (ENSO) forcing in the model improves the forecast skill of monsoon onset when using a large-scale circulation index, with late monsoon onset coinciding with El Niño conditions and early monsoon onset more common in La Niña years. The results of this study suggest that GloSea5's ensemble-mean forecast may be used for reliable Indian monsoon onset prediction a month in advance despite systematic model errors

Numerical Simulation of the Phase Transition Control in a Cylindrical Sample Made of Ferromagnetic Shape Memory Alloy

The paper considers ferromagnetic alloys, which exhibit the shape memory effect during phase transition from the high-temperature cubic phase (austenite) to the low-temperature tetragonal phase (martensite) in the ferromagnetic state. In these alloys, significant macroscopic strains are generated during the direct temperature phase transition from the austenitic to the martensitic state, provided that the process proceeds under the action of the applied mechanical stresses. The critical phase transition temperatures in such alloys depend not only on the stress fields, but also on the magnetic field. By changing the magnetic field, it is possible to control the process of phase transition. In this work, within the framework of the finite deformation theory, we develop a model that allows us to describe the process of the control of the direct (austenite-martensite) and reverse (martensite-austenite) phase transitions in ferromagnetic shape memory polycrystalline materials under the action of external force, thermal, and magnetic fields with the aid of the magnetic field. In view of the fact that the magnetic field affects the material deformation, which, in turn, changes the magnetic field, we formulated and solved a coupled boundary value problem. As an example, we considered the problem of a shift of the outer surface of a long hollow cylinder made of ferromagnetic alloy. The numerical implementation of the problem was based on the finite element method using the step-by-step loading procedure. Complete recovery of the strains accumulated during the direct phase transition and reverting of the axially-displaced outer surface of the cylinder to its original position occurred both on heating of the sample to the temperatures of the reverse phase transition and at a constant temperature, when the magnetic field previously applied in the martensitic state was removed

Microstructural Model of Magnetic and Deformation Behavior of Single Crystals and Polycrystals of Ferromagnetic Shape Memory Alloy

In this article, a microstructural model of the Heusler alloy with the shape memory effect caused by the application of an external magnetic field is constructed. The dynamics of the magnetization process are described using the Landau–Lifshitz–Gilbert equation. For the numerical implementation of the model using the finite element method, the variational equations corresponding to the differential formulation of the magnetic problem are used. Such an approach makes it possible to reduce (weaken) the requirements for the smoothness of the sought solution. The problem of magnetization of single crystals of the Ni2MnGa alloy, which has a “herringbone”-type martensitic structure (a twinned variant of martensite), is considered. In each element of the twin, the magnetic domains with walls of a certain thickness are formed. The motion and interaction of these walls and the rotation of magnetization vector in the walls and domains under the action of the external differently directed magnetic fields are studied. These processes in the Heusler alloy are also accompanied by the detwinning process. A condition for the detwinning of a ferromagnetic shape memory alloy in a magnetic field is proposed, and the effect of the reorientation (detwinning) of martensitic variants forming a twin on the magnetization of the material and the occurrence of structural (detwinning) deformation in it are taken into account. First, the processes of magnetization and structural deformation in a single grain are considered at different angles between the anisotropy axes of twinned variants and the external magnetic field. For these cases, the magnetization curves are constructed, and the deformed states are identified. The model described such experimental facts as the detwinning process and the jump in magnetization on these curves as a result of this process. It was shown that the jump occurred at a certain magnitude of the strength of the applied external magnetic field and a certain direction of its action relative to the twinning system. Then, based on the obtained results, deformed states arising due to the detwinning process were determined for various (isotropic and texture-oriented) polycrystalline samples, and magnetization curves taking into account this process were constructed for these materials

THE ANALYSIS OF DYNAMICS OF TICK INFESTATION WITH BABESIA IN THE KIROV REGION

Objective of research: To study the spread of causative agents of babesiosis in ticks collected on the territory of the Kirov region with the use of molecular-genetic methods. Materials and methods: In this paper, the method of molecular-genetic detection of genetic material of the pathogen in the sample was used (the method of polymerase chain reaction (PCR). Ticks were collected from vegetation cover as well as from people and domestic animals (dogs, cats). Ticks were estimated according to identification tables. Causative agents of babesiosis were determined by the extraction of total nucleic acids from each tick; all ticks were examined using PCR. Total DNA extraction from ticks stored in 70% ethyl alcohol was performed with the use of guanidine thiocyanate. The proportion of ticks infected with Babesia was determined depending on the year, collection area on the territory of the Kirov region, species and sexual belonging of ticks. Results and discussion: It was found that the major tick vectors of Babesia on the territory of the Kirov region are ticks Ixodes persulcatus . In addition, two other tick species Dermacentor reticulatus and I. ricinus were detected in that region. It was shown, that the rate of Babesia infection in ticks Ixodes persulcatus was higher than in D. reticulatus and I. ricinus . The average percentage of ticks infected with Babesia was 53,07 %. A gradual increase of percentage of infected individuals with the maximum value 73,2 % was registered in 2012. However, in the following year, a significant decrease (51,7 %) was reported, and the minimum number of ticks infected with Babesia was observed in 2014 (37,4 %). A significant increase in infestation of ticks was newly observed in 2015 (50,4 %). It was found that male and female ticks are equally likely to be vectors for Babesia. Infection rates in male and female ticks were 54,5 and 49,3 %, respectively. Fluctuations in the number of infected ticks depending on the year (maximum in 2012 and minimum in 2014) were determined. Ticks from South-West districts of the region are mostly infected with Babesia. In the city of Kirov, 55,8 % of ticks are infected with Babesia in spite of acaricide treatment

Associations of NT-proBNP and hepcidin levels with clinical and laboratory parameters in patients with heart failure with various severity of left ventricular systolic dysfunction

Data on hepcidin levels in patients with heart failure (HF) are contradictory and do not make clear its contribution to the progression of multiple organ failure. There remain a number of issues about the prognostic significance of the N-terminal pro-brain natriuretic peptide (NT-proBNP) in HF with preserved ejection fraction (EF). The authors suggested the relationships between these markers in decompensated HF, as well as their associations with other clinical and laboratory parameters.Aim. To identify the association of NT-proBNP and hepcidin levels with clinical and laboratory parameters in patients with HF with various severity of left ventricular (LV) systolic dysfunction.Material and methods. The study included 68 patients (29 women, 39 men; mean age — 72,3±11,7 years) hospitalized due to decompensated HF. Patients were divided into three groups: reduced (HFrEF) (n=20), mid-range (HFmrEF) (n=23), and preserved EF (HFpEF) (n=24). Upon admission, along with standard diagnostic tests, all patients were examined for NT-proBNP and hepcidin levels by enzyme-linked immunosorbent assay. Statistical processing was carried out using the software package Statistica 8.0.Results. NT-proBNP levels in the entire sample was 315,9 [129,9; 576,1] pg/ml. Significantly higher concentrations of NT-proBNP were found in patients with lower EF: 433,05 (346,8-892,6) pg/ml for HFrEF, 289,97 (185,9-345,3) pg/ml for HFmrEF pg/ml and 214,98 (207,37-562,31) pg/ ml for HFpEF (p<0,05). At the same time, hepcidin levels in the HFrEF group (31,63 ng/ml [22,0; 71,6]) was significantly higher than in the HFmrEF (23,89 ng/ml [21,1; 27,9]) (p<0,05) and HFpEF (26,91 ng/ml [18,6; 31,1]) (p<0,05). In HFpEF patients, there was a correlation of hepcidin level with body mass index (r=0,47, p<0,05) and chronic obstructive airway diseases (r=0,44, p<0,05). A correlation of hepcidin level with cardiac arrhythmias (r=0,61, p<0,05) was revealed in the HFmrEF group. In the HFrEF group, there were correlations of a significantly increased level of NT-proBNP (median — 433,05; 95% confidence interval: 346,8-892,6) with indicators of disease severity and multiple organ dysfunction: decrease in systolic blood pressure, cardiorenal syndrome, decrease in hemoglobin level and mean corpuscular hemoglobin concentration, characteristic of iron-deficiency anemia.Conclusion. Patients with lower EF showed higher NT-proBNP values and a trend towards higher hepcidin levels. Relationships of hepcidin and NT-proBNP levels with following clinical parameters were found: body mass index, presence of obstructive airway diseases, cardiac arrhythmias, as well as low cardiac output syndrome, cardiorenal syndrome and anemia

THE ANALYSIS OF IXODES TICKS INFESTATION WITH TBEV IN KIROV REGION

The objects of this study are Ixodes ticks which were collected in different areas of Kirov province. The aim of the study is to determine the proportion of TBEV infected ticks using the reverse transcription and PCR, dependingon time, place, and methods of collection in the Kirov province as well as of ticks specific and sexual identity. The study found that from the two tick species that were tested only taiga tick (Ixodes persulcatus) but not the meadow thick (Dermacentor reticulatus) was the TBEV vector. Study also has shown that both males and females ticks can be the TBEV vectors. Moreover, it was proved the importance of ticks testing which were gathered not only from human but also from animals, primary from dogs, and from the plants

ANALYSIS OF TICKS OF IXODES PERSULCATUS И DERMACENTOR RETICULATUS SPECIES WITH TRANSMISSIBLE DISEASES IN KIROV REGION

Borreliosis, encephalitis, anaplasmosis, ehrlichiosis and babesiosis belongs to tick-borne transmissive diseases. These diseases are dangerous for human and animals as well. Moreover, some animals can have no clinical signs of these diseases. These diseases are widely spread across Russian Federation, although only encephalitis and borreliosis (Lyme disease) are being monitored nowadays. At the same time anaplasmosis, ehrlichiosis and babesiosis (pyroplasmosis) are not being monitored. Thus a goal of monitoring of these diseases appears. The main vector for these diseases are ticks. Ticks can carry and transmit causative agents of the diseases to domestic and wild animals. Thus a goal of monitoring transmissible diseases in different population of ticks gathered in our country appears. In this study PCR was chose. This method is perspective and is widely used to detect infectious diseases nowadays. Moreover this method allows getting results in quite short period of time. The goal of this work is to determine the presence of causative agents of tick-borne diseases in ticks of different species gathered in different areas of Kirov region in 2010–2015 with the help of PCR. Moreover the goal was to determine if there is a relation between a number of infected ticks and its species. To solve these goal a primers, PCR conditions, method of extraction of total nucleic acid from fixed and alive ticks were engineered. Method of extraction of total nucleic acids allowed with the help of a reverse transcriptase to determine tick-borne encephalitis virus in samples. Analyzed ticks were gathered in Kirov region. It was determined that main vectors in these region are of an Ixodes persulcatus and a Dermacentor reticulatus species. It was prooved that the number of infected ticks can vary in time. It was also proved that there is no significant difference in the number of infected with TBEV and Lyme disease causative agents but there is a significant difference in the number of infected ticks with anaplasmosis, ehrlichiosis and babesiosis causative agents

THE ACCURACY INVESTIGATION OF THE HIGH POSITION OF THE ROAD COVERAGE SURFACE WITH THE DIFFERENT GEODESIC DEVICES’ APPLICATION

Introduction. The updated wording of the rulebooks SP apply instead of the SNiP for the road construction last time, in which the accuracy requirements of the device bases and pavements is greatly increased. To ensure high requirements to the accuracy of vertical position of the structural layers of bases and covers roads there is a need of application of modern surveying instruments (precision optical levels and electronic total stations with different accuracy). Materials and methods. The research of the vertical position accuracy (unevenness) of the coating roads surface in IV category at the constructive layers’ device is observed with the road vehicles without an automatic system of vertical heights and with the leveling step through 10 m. Results. The calculated statistical characteristics and parameters for the deviations’ distribution of the amplitudes on the pavements’ surface elevation, which are obtained according to the measurement results, are used on the N-3 optical level and on the TRIMBLE M3 electronic total station. Discussion and conclusion. The standard deviations’ values of the amplitude, which are obtained by the N-3 optical level’s usage and by the electronic total station’s usage, remain on the same accuracy order. Therefore, the usage of the electronic total stations for the accuracy ensuring is planned also on the vertical position of their bases and pavements

Ensuring accuracy of prolozheniya of the levelling courses at research and carrying out of elevation marks of pickets at construction of highways

Ensuring accuracy of a prolozheniye of the leveling courses at research and carrying out of elevation marks of pickets at construction of highways is considered. Admissions, classes of leveling and length of the high-rise courses at their prolozheniye are provided lengthways or on the route at research and carrying out of elevation marks of pickets at construction of highways taking into account their categories, uses of sets of cars of keeping of elevation marks and coefficients of accuracy of technological processes when performing geodetic and construction works