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Wyświetlanie 1-15 z 74
Tytuł:
Zagrozenia zdrowotne zwiazane z wirusem ptasiej grypy
Health risks connected with the avian flu virus
Autorzy:
Brydak, L B
Powiązania:
https://bibliotekanauki.pl/articles/838455.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
zagrozenia czlowieka
zagrozenia zdrowia
wirus influenzy ptakow
influenza ptakow
choroby zwierzat
Źródło:
Annals of Parasitology; 2007, 53, 2; 81-84
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zagrożenia zdrowotne związane z wirusem ptasiej grypy
Health risks connected with the avian flu virus
Autorzy:
Brydak, L. B.
Powiązania:
https://bibliotekanauki.pl/articles/2143849.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
zagrozenia czlowieka
zagrozenia zdrowia
wirus influenzy ptakow
influenza ptakow
choroby zwierzat
Opis:
The first human cases of infections with entire avian influenza strain were caused by subtype A/H5N1/ and occurred in 1997 in Hong Kong. Since this year until 27 March 2007 World Health Organization confirmed over 370 human cases of infections with avian influenza and almost 160 persons died due to this pathogen. At present there is known that person to person transmission of avian influenza virus is limited. Nevertheless, it is possible that with time virus will adapt to human sufficiently to be able to cause next influenza pandemic. Despite intensive studies and global influenza surveillance there is no possible to predict when pandemic will begin and what kind of virus will cause this outbreak.
Źródło:
Wiadomości Parazytologiczne; 2007, 53, 2; 81-84
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Testing of human specimens for the presence of highly pathogenic zoonotic avian influenza virus A [H5N1] in Poland in 2006-2008 - justified or unnecessary steps?
Autorzy:
Romanowska, M
Nowak, I.
Brydak, L.B.
Wojtyla, A.
Powiązania:
https://bibliotekanauki.pl/articles/50626.pdf
Data publikacji:
2009
Wydawca:
Instytut Medycyny Wsi
Tematy:
avian influenza virus type A
zoonosis
influenza
H5N1 subtype
avian influenza
disease outbreak
diagnostic test
Polska
Źródło:
Annals of Agricultural and Environmental Medicine; 2009, 16, 2; 239-247
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phylogenetic analysis of swine influenza viruses isolated in Poland
Autorzy:
Kowalczyk, A
Markowska-Daniel, I.
Powiązania:
https://bibliotekanauki.pl/articles/30634.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pig
animal population
European population
swine influenza virus
H1N1 subtype
H3N3 subtype
phylogenetic analysis
isolation
Polska
Opis:
Swine influenza virus (SIV) of H1N1 and H3N2 subtypes are dominated in European pigs population. "Classical swine" H1N1 subtype was replaced by "avian-like" H1N1 subtype. It co-cir- culates with H3N2 reassortant possessing "avian" genes. In the present study, 41 SIV strains isolated from pigs with pneumonia, raised in 20 Polish farms, were identified and characterised. Since it was evidenced that isolates from the same geographic district and the same year of isolation are in 100% similar, 15 strains representing different district and different year of isolation were chosen to construct phylogenetic trees. Two genes, conservative matrix 1 (Ml) and the most variable, haemagglutynin (HA), were sequenced and subjected into phylogenetic analysis. The results of the analysis confirmed that "avian-like" swine H1N1 strains evolved faster than classical SIV strains. HA gene of these isolates have been derived from contemporary strains of "avian-like" SIV. In contrast, the Ml gene segment may have originated from avian influenza viruses. H3N2 strain is located in swine cluster, in the main prevalent European group of H3N2 isolates called A/Port Chalmers/l/73-like Eurasian swine H3N2 lineage, which has evolved separately from the human H3N2 virus lineage around 1973.
Źródło:
Polish Journal of Veterinary Sciences; 2010, 13, 1; 37-44
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ptasia grypa - zagrożenie dla zdrowia człowieka oraz sytuacja epidemiologiczna w Polsce w grudniu 2007 roku
Avian influenza - a risk to human health and epidemilogical situation in Poland in December 2007
Autorzy:
Wrzesień, R.
Budzińska-Wrzesień, E.
Jarmuł-Pietraszczyk, J.
Moskwa, M.
Powiązania:
https://bibliotekanauki.pl/articles/126093.pdf
Data publikacji:
2010
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
choroby zakaźne zwierząt
ptasia grypa
sytuacja epidemiologiczna
contagious animal diseases
avian influenza
epidemiological situation
Opis:
Choroby zakaźne zwierząt stanowią duże niebezpieczeństwo nie tylko dla zwierząt, ale także dla ludzi. Jedną z najgroźniejszych chorób jest ptasia grypa. Przyczynia się do tego szybki sposób rozprzestrzeniania się wirusa H5N1, a także możliwość mutacji tego patogenu w formę mającą zdolność przenoszenia się z człowieka na człowieka. Do Polski ptasia grypa powróciła w grudniu 2007 roku. Spowodowała szkody wynoszące ponad 12 milionów złotych.
Animal infectious diseases pose a great threat not only to animals but also to humans. One of the most dangerous diseases is avian influenza because of the rapid spread of H5N1 virus and a possibility of mutations of this pathogen into a form able to transmit from one person to another. In Poland the avian influenza returned in December 2007. It caused losses calculated at 12 million zlotys. A questionnaire was prepared within this study to present the risk posed by the avian influenza from human perspective.
Źródło:
Proceedings of ECOpole; 2010, 4, 2; 523-527
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection and differentiation of Newcastle disease virus and influenza virus by using duplex real-time PCR
Autorzy:
Nidzworski, Dawid
Wasilewska, Edyta
Smietanka, Krzysztof
Szewczyk, Bogusław
Minta, Zenon
Powiązania:
https://bibliotekanauki.pl/articles/1039554.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
Newcastle disease virus
influenza virus
detection
differentiation
real-time PCR
duplex
Opis:
Newcastle disease virus (NDV), member of the Paramyxoviridae family and avian influenza virus (AIV), member of the Orthomyxoviridae family, are two main avian pathogens causing serious economic problems in poultry health. Both are enveloped, single-stranded, negative-sense RNA viruses and cause similar symptoms, ranging from sub-clinical infections to severe diseases, including decrease in egg production, acute respiratory syndrome, and high mortality. Similar symptoms hinder the differentiation of infection with the two viruses by standard veterinary procedures like clinical examination or necropsy. To overcome this problem, we have developed a new duplex real-time PCR assay for the detection and differentiation of these two viruses. Eighteen NDV strains, fourteen AIV strains, and twelve other (negative control) strains viruses were isolated from allantoic fluids of specific pathogen-free (SPF), embryonated eggs. Four-weeks-old SPF chickens were co-infected with both viruses (NDV - LaSota and AIV - H7N1). Swabs from cloaca and trachea were collected and examined. The results obtained in this study show that by using duplex real-time PCR, it was possible to detect and distinguish both viruses within less than three hours and with high sensitivity, even in case a bird was co-infected. Additionally, the results show the applicability of the real-time PCR assay in laboratory practice for the identification and differentiation of Newcastle disease and influenza A viruses in birds.
Źródło:
Acta Biochimica Polonica; 2013, 60, 3; 475-480
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Why Don’t Blanchard-Kahn ever "Catch" Flu? And How it Matters for Measuring Indirect Cost of Epidemics in DSGE Framework
Autorzy:
Torój, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/483327.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
indirect cost
influenza
DSGE
Blanchard-Kahn conditions
modelling epidemics
Opis:
We attempt to apply a New Keynesian open economy model to simulate the economic consequences of influenza epidemic in Poland and measure the output loss (indirect cost) related to this disease. We introduce a negative health shock on the supply side of the economy and demonstrate that such a shock – implemented as a reduction in labour utilisation under unchanged labour cost – is not equivalent to negative labour supply shock. As expectational effects may hypothetically play a significant role in determining the economic cost of influenza, we attempt to endogenise the mechanism of epidemic in the model for the rational expectations solution algorithm to take account for the possibility of epidemic. This attempt has failed for the standard SIR model of epidemic and for the standard Blanchard-Kahn-like local solution methods, as the SIR block is only consistent with Blanchard-Kahn conditions under herd immunity of the population. In the deterministic simulation with the number of infected given exogenously, the output loss resulting from influenza-related presenteeism and absenteeism was estimated at 0.004% of the steady state level on average in the period 2000-2013. The simulated indirect cost in the New Keynesian model has turned out to be lower than the estimates that one could possibly obtain using the human capital approach. The reason for this discrepancy is the demand-oriented construction of the New Keynesian framework, and we treat this result as closer in notion to what the friction cost approach might suggest.
Źródło:
Central European Journal of Economic Modelling and Econometrics; 2013, 5, 3; 185-206
2080-0886
2080-119X
Pojawia się w:
Central European Journal of Economic Modelling and Econometrics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A clinical utility of a strip test for influenza A/B and comparison with detection by RT PCR
Autorzy:
Miarka, Maciej
Horban, Andrzej
Maliszewska, Henryka
Biliński, Przemysław
Prus-Kowalczuk, Wanda
Powiązania:
https://bibliotekanauki.pl/articles/1039251.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
A/H1N1/v influenza virus
strip test
influenza RT PCR
Opis:
Introduction and objective: In June 2009 the World Health Organization announced influenza pandemic caused by A/H1N1/v virus. It became crucial to recognize new cases of A/H1N1/v infection. An effective screening diagnostic procedure was needed for patients suffering from influenza-like symptoms for making an initial diagnosis and analyzing epidemiological pattern of infection. We used a strip test for influenza A/B as a screening diagnostic procedure for patients suffering from influenza-like symptoms for making an initial diagnosis. For comparison, RT PCR for detecting A/H1N1/v was performed. The aim of this study was to assess the efficacy and sensitivity of the strip test and its value for making initial diagnosis of influenza A/H1N1/v. Material and methods: Strip testing for the influenza A/B infection was performed on 1123 patients with influenza-like symptoms in the Admission Unit of the Regional Infectious Diseases Hospital in Warsaw. Strip test results were analyzed according to the age of patients and season of the year. For 97 patients strip test results for detecting A/H1N1 infection were compared with those obtained by RT PCR. Results: There were no statistically significant differences found between the methods and strip testing demonstrated sensitivity of 61% and specificity of 71%. Conclusions: No statistically significant differences were found between the two methods, however, strip test had low sensitivity and specificity.
Źródło:
Acta Biochimica Polonica; 2014, 61, 3; 485-487
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A universal flu vaccine
Autorzy:
Kesik-Brodacka, Malgorzata
Plucienniczak, Grazyna
Powiązania:
https://bibliotekanauki.pl/articles/1039259.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
universal vaccine
flu vaccine
influenza virus
Opis:
Influenza is a global health concern. The single most effective way of protecting people against influenza infection and disease is vaccination. However, currently available vaccines against influenza induce only strain-specific immunity, and do not elicit long-lasting serum antibody titers. Therefore, they are ineffective in the case of possible pandemics. There is an urgent need for a new generation vaccine which would induce broad and long-lasting immune protection against antigenically distinct flu viruses. The paper presents recent achievements and the challenges in the field of universal vaccine construction.
Źródło:
Acta Biochimica Polonica; 2014, 61, 3; 523-530
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Active surveillance in poultry in Poland for avian influenza subtypes H5 and H7
Autorzy:
Pikuła, Anna
Śmietanka, Krzysztof
Lisowska, Anna
Minta, Zenon
Powiązania:
https://bibliotekanauki.pl/articles/1039246.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
avian influenza virus (AIV)
poultry
surveillance
hemagglutination inhibition test (HI)
Opis:
A serological surveillance programme for avian influenza A virus (AIV) subtype H5 and H7 in poultry was implemented in Poland in 2008-2013 with two main objectives: i) to detect subclinical infections or previous exposures to AIV H5 and H7 subtypes and ii) to demonstrate the AI- free status of Poland. During this period, over 45 000 serum samples from 2833 holdings were examined using the hemagglutination inhibition test (HI). The presence of HI antibodies was detected in 8 breeder geese holdings (7 positive for H5 and 1 positive for H7 AIV) and in 1 breeder duck holding (H5-positive), which represented 0.32% of all investigated holdings. All seropositive flocks were examined by real time RT-PCR with negative results, which substantiated the AI-free status of Poland. Positive results detected in clinically healthy poultry kept in an open range system indicate prior infections with low pathogenic AIV originating from the wild-bird reservoir.
Źródło:
Acta Biochimica Polonica; 2014, 61, 3; 459-463
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antibody response to DNA vaccine against H5N1 avian influenza virus in broilers immunized according to three schedules
Autorzy:
Stachyra, Anna
Góra-Sochacka, Anna
Zagórski-Ostoja, Włodzimierz
Król, Ewelina
Sirko, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/1039267.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
Avian influenza
H5N1
DNA vaccine
broilers
Opis:
Broiler type chickens were immunized intramuscularly with a DNA vaccine encoding hemagglutinin (HA) from H5N1 avian influenza virus. The chickens were divided into four groups: control group which was not immunized, a group which obtained only one dose, and two groups which were immunized twice, one group with a boost two weeks after the priming and the other four weeks. Blood samples were collected at several time points and the dynamics of the humoral response to the vaccine was studied. High level of anti-HA antibodies was detected only in the last two groups, that is in chickens immunized according to the prime-boost strategy, regardless of the schedule. An additional interesting observation of this study was detection of the cross-reactivity of an anti-H5 HA positive serum with H5N2 and H1N1 viruses, suggesting that the DNA vaccine tested can induce antibodies of a broad specificity.
Źródło:
Acta Biochimica Polonica; 2014, 61, 3; 593-596
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antiviral activity of novel oseltamivir derivatives against some influenza virus strains
Autorzy:
Kocik, Janusz
Kołodziej, Marcin
Joniec, Justyna
Kwiatek, Magdalena
Bartoszcze, Michał
Powiązania:
https://bibliotekanauki.pl/articles/1039256.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
influenza virus
neuraminidase inhibitors
oseltamivir
antiviral activity
cytotoxicity
Opis:
The aim of this study was to investigate the in vitro cytotoxicity of oseltamivir derivatives and determine their activity against A/H1N1/PR/8/34 and A/H3N2/HongKong/8/68 - strains of influenza virus. Antiviral activity of these compounds was determined by using two methods. MTT staining was used to assess the viability of MDCK cells infected with influenza viruses and treated with various concentrations of drugs. In parallel, the effect of drugs on viral replication was assessed using the hemagglutination test. The most toxic compounds were: OS-64, OS-35, OS-29, OS-27 and OS-25, whereas OS-11, OS-20 and OS-23 were the least toxic ones. Statistically significant antiviral effect at a higher virus dose was shown by compounds: OS-11, OS-20, OS-27, OS-35, and OS-64. H3N2 virus was sensitive to 10-times lower concentrations of OS-11 and OS-35 than H1N1. At a lower infection dose, the antiviral activity was observed for OS-11, OS 27, OS-35 and OS-20. OS-64 turned out to be effective only at a high concentration. OS-23 showed no antiviral effect.
Źródło:
Acta Biochimica Polonica; 2014, 61, 3; 509-513
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antivirals - current trends in fighting influenza
Autorzy:
Król, Ewelina
Rychłowska, Małgorzata
Szewczyk, Bogusław
Powiązania:
https://bibliotekanauki.pl/articles/1039254.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
influenza virus
antivirals
novel anti-influenza drugs
antiviral therapy
inhibitors
Opis:
Influenza virus infection is a major source of morbidity and mortality worldwide. Due to the variable effectiveness of existing vaccines, especially in the early stages of an epidemic, antiviral drugs represent the first line of defense against the virus. Currently, there are two major classes of anti-influenza drugs approved by the FDA for clinical use: M2 protein inhibitors (amantadine and rimantadine) and neuraminidase inhibitors (zanamivir and oseltamivir). However, increasing resistance to these available influenza antivirals among circulating influenza viruses highlights the need to develop alternative approaches for the prevention and/or treatment of influenza. This review presents an overview of currently available drugs for influenza treatment as well as summarizes some new antiviral strategies that are now being tested covering agents targeting both the viral proteins and the host-virus interaction. We discuss their mechanisms of action, resistance and the therapeutic potential as new antiviral drug for use in future influenza pandemics. Additionally, combination therapy based on these drugs is also described.
Źródło:
Acta Biochimica Polonica; 2014, 61, 3; 495-504
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Avian influenza in Poland
Autorzy:
Śmietanka, Krzysztof
Minta, Zenon
Powiązania:
https://bibliotekanauki.pl/articles/1039245.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
avian influenza
H5N1 virus
Opis:
Poland has experienced four episodes of avian influenza (AI) outbreaks over the past two decades. The first epidemic was caused by a low pathogenicity (LPAIV) H7N7 subtype and occurred in fattening and breeder turkeys in 1995. Two waves of H5N1 high pathogenicity avian influenza (HPAI) took place in 2006 and 2007. In spring 2006, 64 cases of the H5N1 virus were detected, mostly in mute swans. In December 2007, ten outbreaks of H5N1 HPAI were detected in commercial poultry (n=9) and wild birds kept in captivity (n=1). The outbreaks in 2006 and 2007 were caused by genetically similar but clearly distinguishable viruses of the 2.2 clade. In 2013, an H9N2 avian influenza virus was detected in 4 fattening turkey holdings. The virus was low pathogenic and a phylogenetic study has shown a close relatedness to the Eurasian lineage of AIV of the wild bird origin. Neither preventive nor prophylactic vaccinations have ever been used in poultry or other birds. Emergency vaccinations using autogenous vaccine were introduced only to control the H7N7 LPAI outbreaks in 1995. The baseline surveillance for AI in live migratory birds and poultry provides a valuable insight into the ecology of AIV at the wild and domestic bird interface. Passive surveillance is in place of early detection of HPAIV infection in dead or moribund birds.
Źródło:
Acta Biochimica Polonica; 2014, 61, 3; 453-457
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection of the influenza virus yesterday and now
Autorzy:
Woźniak-Kosek, Agnieszka
Kempińska-Mirosławska, Bogumiła
Hoser, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/1039248.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
influenza
virus
detection method
diagnostics
PCR
viral respiratory tract infection
Opis:
Demographic changes and the development of transportation contribute to the rapid spread of influenza. Before an idea of a 'person to person' spread appeared, divergent theories were developed to explain influenza epidemics in the past. Intensified virological and serological tests became possible after isolation of the human influenza virus in 1933. The first influenza virus detection methods were based on its isolation in egg embryos or cell lines and on demonstration of the presence of the viral antigens. Molecular biology techniques associated with amplification of RNA improved the quality of tests as well as sensitivity of influenza virus detection in clinical samples. It became possible to detect mixed infections caused by influenza types A and B and to identify the strain of the virus. Development of reliable diagnostic methods enabled fast diagnosis of influenza which is important for choosing an appropriate medical treatment.
Źródło:
Acta Biochimica Polonica; 2014, 61, 3; 465-470
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
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