Evaluation of the Activity of Influenza and Influenza-Like Viruses in the Epidemic Season 2013/2014

Bednarska, Karolina; Hallmann-Szelińska, E.; Kondratiuk, Katarzyna; Brydak, Lidia B.

doi:10.1007/5584_2015_116

Cited by 19 publications

(21 citation statements)

References 5 publications

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“…In the 2012/ 2013 season, co-infections were as follows: ten of subtype A/H1N1/pdm09 with A/H3N2/ and 8 of A/H3N2/ with type B virus (Czarkowski et al 2014). In the 2013/2014 season, co-infections were as follows: two of subtype A/H1N1/pdm09 with A/H3N2/, seven of influenza with influenza-like viruses (two of influenza type A virus, RSV A virus, and RV A/B virus in one-day old and one-month-old children each), and three of influenza-like viruses (Bednarska et al 2015). In the 2014/2015 season, in a framework of the I-MOVE (Influenza Monitoring of Vaccine Effectiveness) program, the following co-infections were detected: seven of subtype A/H1N1/pdm09 with type B virus and eight of subtype A/H3N2/ with type B virus.…”

Section: Discussionmentioning

confidence: 99%

“…In that last season, in addition, one co-infection of influenza viruses and four of influenza viruses with influenza-like viruses were noted in children under 14 years of age . A significant increase in the number of infections with more than one respiratory virus in the 2015/2016 season could be associated with a higher number of samples tested (8542 samples) compared with the two preceding seasons (2479 and 2416 samples, respectively) Bednarska et al 2015). Nonetheless, influenza viruses constantly evolve, undergoing antigenic changes, which provides them the ability to elude the host immune response system (Webster et al 2013).…”

Section: Discussionmentioning

confidence: 99%

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Co-infection with Influenza Viruses and Influenza-Like Virus During the 2015/2016 Epidemic Season

Szymański

Cieślak

Kowalczyk

et al. 2017

Influenza and Respiratory Care

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Concerning viral infection of the respiratory system, a single virus can cause a variety of clinical symptoms and the same set of symptoms can be caused by different viruses. Moreover, infection is often caused by a combination of viruses acting at the same time. The present study demonstrates, using multiplex RT-PCR and real-time qRT-PCR, that in the 2015/2016 influenza season, co-infections were confirmed in patients aged 1 month to 90 years. We found 73 co-infections involving influenza viruses, 17 involving influenza viruses and influenza-like viruses, and six involving influenza-like viruses. The first type of co-infections above mentioned was the most common, amounting to 51 cases, with type A and B viruses occurring simultaneously. There also were four cases of co-infections with influenza virus A/H1N1/pdm09 and A/H1N1/ subtypes and two cases with A/H1N1/pdm09 and A/H3N2/ subtypes. The 2015/2016 epidemic season was characterized by a higher number of confirmed co-infections compared with the previous seasons. Infections by more than one respiratory virus were most often found in children and in individuals aged over 65.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Co-infection with Influenza Viruses and Influenza-Like Virus During the 2015/2016 Epidemic Season

Szymański

Cieślak

Kowalczyk

et al. 2017

Influenza and Respiratory Care

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“…A decline in the number of confirmed cases of influenza virus subtype A/H3N2/, which accounted for only 1% in the Kuyavian-Pomerianian and Masovian provinces, was observed in 2015/16 compared with that in 2014/15 (Bednarska et al 2015); a situation similar to that also noted in Russia where this subtype caused only sporadic infections (Kimissarov et al 2016). In contrast, predominance of influenza virus type B was observed the West Pomerania that lies west of the provinces above mentioned near Germany where type B virus was found to predominate in the 2015/16 influenza season (Flu News Europe 2016).…”

Section: Influenza-like Illnessmentioning

confidence: 94%

“…The information on influenza and influenza-like infections has been gathered in all districts by means of both Sentinel and non-Sentinel systems. Since the 2013/14 epidemic season, data consisting of the number of samples tested, suspected and confirmed cases of infection, hospitalizations, and deaths in each province are stratified into seven age-groups (Hallmann-Szelińska et al 2016a, b;Bednarska et al 2015). These data are then further elaborated and randomly checked for correctness of viral identification in the National Influenza Center (NIC) at the National Institute of Public Health-National Institute of Health (NIPH-NIH 2016).…”

Section: Introductionmentioning

confidence: 99%

Regional Diversification of Influenza Activity in Poland During the 2015/16 Epidemic Season

Szymański

Kowalczyk

Cieślak

et al. 2017

Clinical Research and Practice

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The National Influenza Center (NIC) at the Department of Influenza Research of the National Institute for Public Health-National Institute of Hygiene (NIPH-NIH) participates in the Global Influenza Surveillance and Response System (GISRS) and continuously coordinates epidemiological and virological surveillance of influenza in Poland. The aim of this study was to determine the regional differences of influenza activity in Poland in the 2015/16 epidemic season. The influenza surveillance involved 16 administrative districts in which there are Voivodeship (province) Sanitary Epidemiological Stations set up to report influenza and influenza-like illness among the Polish population. Over 8000 specimens were tested in the season with regard to the respiratory viral infections in all regions investigated. The circulation of influenza viruses A and B was confirmed, with the subtype A/H1N1/pdm09 being predominant in the Pomerania, Podlaskie, Subcarpathian, Lubuskie, Silesian, and Warmian-Masuria provinces. The influenza-like virus occurred in individual cases, except for respiratory syncytial virus that also was detected in the Greater Poland and Warmia-Masuria provinces. The highest incidence of cases and suspected cases of influenza was recorded in Pomerania and the lowest one in Lubuskie provinces. The knowledge of regional differences in influenza activity is important for streamlining the distribution of preventive, therapeutic, and economic resources to combat the epidemic.

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“…Influenza has been and remains the cause of many seasonal infections, often leading to irreversible complications and even to death, in all age groups, all patient heath profiles, and all latitudes [1,2]. the variability of the influenza virus means that the flu vaccine needs to be adjusted prior to each influenza season.…”

Section: Introductionmentioning

confidence: 99%

A comparative analysis of influenza virus infections in the 2013/2014 and 2014/2015 epidemic seasons in the reporting system, for different age groups in Poland

Hallmann-Szelińska¹,

Rabczenko²,

Bednarska³

et al. 2016

fmpcr

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Background. Influenza remains the cause of many seasonal infections, leading even to death, in all age groups, for all patient health states, under all health policies, and in all latitudes. Influenza infection needs to be thought of not only in terms of the loss of health and the exacerbation of existing diseases, but also in terms of the quantifiable financial consequences borne by the state. Objectives. the aim of the study was to compare two influenza seasons: 2013/14 and 2014/15 through an analysis of the number of samples in different age groups, collected on a weekly basis for 52 weeks, and to interpret the results in terms of type and subtype. Material and methods. Virological and epidemiological data were obtained from the SEntinEl and non-SEntinEl programs. Virological tests were performed using Rt-PcR and multiplex Rt-PcR biological molecular methods. Results. the maximum number of confirmed cases of influenza coincides in time with the maximum number declared cases and suspected cases of influenza and influenza-like viruses. the peak occurrence of influenza-like virus detection was earlier than the peak detection of influenza virus. in the 2014/15 influenza season, significant differences in the percentage of positive samples were observed between the 5-9 and 10-14 age groups. During the 2013/14 influenza season, there was no statistically significant difference in the percentage of positive samples between the 15-25, 26-44, and 45-64 year old age groups. Conclusions. A new division of age groups allows more accurate assessment of the incidence of influenza and influenza-like illnesses and can assist health workers in preventing multiorgan influenza-related complications and deaths.

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Evaluation of the Activity of Influenza and Influenza-Like Viruses in the Epidemic Season 2013/2014

Cited by 19 publications

References 5 publications

Co-infection with Influenza Viruses and Influenza-Like Virus During the 2015/2016 Epidemic Season

Co-infection with Influenza Viruses and Influenza-Like Virus During the 2015/2016 Epidemic Season

Regional Diversification of Influenza Activity in Poland During the 2015/16 Epidemic Season

A comparative analysis of influenza virus infections in the 2013/2014 and 2014/2015 epidemic seasons in the reporting system, for different age groups in Poland

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