Detection of Polioviruses in Sewage Using Cell Culture and Molecular Methods.

The work presented here demonstrates the utility of a two-step algorithm for environmental poliovirus surveillance based on: preselection of sewage samples tested for the presence of enteroviral genetic material-RT-PCR assay and detection of infectious viruses by cell culture technique (L20B for polioviruses and RD for polio and other non-polio enteroviruses). RD and L20B cell lines were tested to determine their sensitivity for isolation of viruses from environmental samples (sewage). Finally, we wanted to determine if sewage concentration affects the results obtained for RT-PCR and cell cultures.

Problem of rubella in Poland after compensatory outbreak in 2013.

The attempt to estimate the real number of rubella cases in the years 2015-2016 in Poland was presented in this paper. The relations between number of reported cases of measles in 2006-2015y., the number of laboratory-confirmed cases of rubella among cases suspected of measles and the proportion of rubella among patients suspected of measles in the last 10 years as well as the results of serological examination in samples from 74 patients suspected of rubella collected in the first half of 2016 year were analysed.

Selected aspects of filoviruses in the view of Ebola virus disease epidemic.

Ebola virus disease (EVD) is a zoonosis of high virulence in humans. Current epidemic in West Africa is the largest EVD epidemic reported so far, exceeding the number of cases notified and geographical regions affected. This article discusses selected aspects of Ebola virus biology and ecology which are of significance for the processes of primary infection in humans and the spread of epidemic in population.

Seroprevalence of measles-specific antibodies in the group predominantly affected by measles in 2006-2009 in Poland.

Introduction: Irrespective of the high vaccination coverage against measles, sporadic measles outbreaks still occur in Poland. In 2006-2009, a slight increase in the number of measles cases was observed. Of these cases, people born in 1976-198 9 were predominantly affected.

Imported cases of dengue in Poland and their diagnosis.

Infections with dengue virus are transmitted by mosquitoes. In tropical areas, it is mainly spread by Aedes aegypti while in countries with lower temperatures by Aedes albopictus. Since 2010, autochthonous cases of dengue are also reported in Europe.

Non-influenza viruses in acute respiratory infections among young children. High prevalence of HMPV during the H1N1V.2009 pandemic in Poland.

Unlabelled: In Poland the majority of hospitalized cases of pneumonia (annually more than 70000) were reported without determination of an aetiological agent (J18 of ICD-10), also because diagnosis of viral ARTI is limited to identification of influenza viruses or sometimes RSV.

Material And Methods: For determination the contribution of non-influenza viruses in ARTI among children, 381 nasopharyngeal swabs from hospitalized in period X.2008-IV.

RSV respiratory infection in children under 5 y.o.--dynamics of the immune response Th1/Th2 and IgE.

Introduction: The imbalance of Th1/Th2 cytokine concentrations and increased level of IgE might be useful tool for prediction of severity of RSV infection among young children and possibility of sequels. The ratio of cytokines Th1/Th2 varied during the disease. THE AIM of our studies was the assessment of immunological response by dynamics of Th1 and Th2 cytokines and IgE in RSV infections.

Sequence based typing and pre-absorption test in retrospective analysis of a pseudo-outbreak of Legionella infections differentiates true cases of legionellosis.

Unlabelled: The aim of this study was elimination of false positive results obtained by the Chlamylege kit. Two serological kits (IgM ELISA L. pneumophila sgs1-7; ImmuView(TM) L.

[Demographic characteristics of reported cases of legionellosis in years 2005-2009 in Poland in comparison to EWGLI data].

In Poland, all forms of legionellosis are obligatory reported: Legionella pneumonia and extrapulmonary legionellosis (such as Pontiac fever). Total 210 cases caused by Legionella sp. were reported in years 2003-2010.

Detection of hMPV antigen by EIA in clinical specimens.

Unlabelled: Human Metapneumovirus (hMPV) is one of the latest discovered viruses. It has been classified to Paramyxoviridae family. It is the second viral etiological agent, after RSV, which causes respiratory tract infections (RTI) in children, especially children below 5 years old.

Infections caused by RSV among children and adults during two epidemic seasons.

Respiratory Syncytial Virus (RSV) is one of the most common causes of lower respiratory tract infections in young children, immunocompromised patients (children and adults), patients with chronic respiratory diseases and elderly people. Reinfections occur throughout the life, but the severity of disease decreased with subsequent infection. The aim of this study was to analyze the frequency of RSV infections in two selected subpopulations: young children (below 5 y.

[Immunity against tick borne encephalitis virus (TBE) in population of forest workers in Bialowieza].

In Poland, 200 cases of tick borne encephalitis are annually registered. It is about half of all registered cases of viral encephalitis. Immunity acquired after vaccination with TBE inactivated vaccine persists defined time dependent on number of dose of vaccine and individual features of vaccinated person.

[Detection of TBEV RNA in ticks as a tool for valuation of endemic area wide and sensitivity of TBE surveillance].

In this study we present the nested RT-PCR strategy designed for detection of TBEV RNA in ticks Ixodes ricinus. The presented nested RT-PCR method using 2 different primer pairs specific primers for NS5 gene provides specific TBEV cDNA detectable by electroforesis in agarose gel. Of the 177 polls of ticks investigated, TBEV RNA was detected in 14, which accounts for 7.

Tick-borne encephalitis outbreak in Hungary due to consumption of raw goat milk.

A tick-borne encephalitis outbreak involving 25 patients of 154 exposed persons occurred in Hungary in August 2007. None of the patients had a history of tick-bite, however all of them drank unpasteurized raw goat milk from the same farm. The aim of this study was to identify the goats on the farm which could have spread the infection through their milk.

[Occurrence of human hantavirus infections in Poland].

A spread of hantavirus infections causing hemorrhagic fever with renal syndrome is one of the rising epidemiological problems in the world. There is evidence that this type of viruses exists in almost all European countries. It is known that in Poland all the species of wild rodents hosting European hantaviruses are present.

[The cross and unspecific reactions in serological examination for antibodies against hantavirus Puumala].

A serological survey of 78 zoologist capturing small wild rodents in their environment, 9 patients with suspected hantavirus infections and 21 patients with acute renal dysfunction for antibodies to hantaviruses was conducted in Poland. Survey was done by the indirect ELISA with Puumala and Hantaan virus antigens. Out of the 78 mammalogists 15 were seropositive for hantavirus Puumala IgG without history of clinical illness.

[Hantavirus specific IgG antibodies in population of zoologists and forest workers].

Serological diagnostic tests were introduced for detection of immunoresponse against to etiological agents of current infectious diseases. Interpretation criteria for those tests should eliminate unspecific reactions, cross-reactivity with related viruses as well as traces amounts of immunological response against to the past infections. In the case of past hantaviruses infections for obtaining an adequate seroepidemiological data revalidation of this tests are required.

[Measles elimination programme on the world and Poland].

Measles is still one of the leading causes of children mortality, despite of availability of a cheap, effective and safe vaccine for more than 40 years. Effective global eradication of smallpox and the success of polio eradication have provided an incentive to achieve the measles eradication all over the world. Elimination is achieved when no endemic measles cases has been observed in given area.

[Effect of cytomegalovirus strain selection on stimulation of cytokine panel Th1/Th2].

CMV infection can undergoing as primary or secondary infection, which can be represented by reactivation of endogenous infection or by superinfection with another viral strain. Taking for consideration high prevalence of seropositive persons it may be concluded that superinfections occur quite often. For the other hand it is known, that differences among CMV strains are deep and regard as well viral structure as its biological properties.

Differences in stimulation of CD45+ cells from mouse spleen population enriched in dendritic cells depending on the virulence of herpes simplex virus type 1 strains.

The interaction of CD28 with one of the B7 molecules (CD80 and CD86) on professional antigen-presenting cells (APC) is generally considered to be the most important co-stimulatory signal for T cell activation. Several lines of evidence suggest that dendritic cells (DC), the most potent antigen presenting cells known, play a role in the immunological control of herpes simplex virus (HSV) infections. The fact that CD86 is strongly up-regulated together with other co-stimulatory molecules during DC maturation suggests that it plays an important role in induction of immune response.

[Viral hemorrhagic fevers--epidemiology and clinical picture].

The article presents current knowledge about viral hemorrhagic fevers (VHF), their epidemiology, etiological factors, pathogenesis, symptoms and clinical management. Since none of the diseases appear endemically in Poland, special attention was given to spatial distribution of VHF for the purpose to facilitate undertaking clinical suspicions on the basis of the patient's recent travels. Determining the etiological agent should lead to selection of appropriate management options.

[Detection of nonpoliomyelitic enteroviruses in central nervous system infections in Poland in 1995-2000; viral isolation data].

The aim of this study was evaluation of enterovirus diagnosis based on isolation of the virus in cell culture from subjects with aseptic neuroinfection conducted in six Provincial Sanitary-Epidemiological Stations in 1995-2000 years. Available data from six Sanitary-Epidemiological Stations indicated that 1429 isolation of enteroviruses from fecal samples of those patients were performed. The most frequently isolated enterovirus serotype was echovirus type 30: 138/203 isolated enteroviruses, but also others enterovirus serotypes were isolated in a study period.

[Cytotoxicity of DMSO for MRC5, Chang liver and CV1 cells evaluated in vitro by LK, MTT and NR assays].

Evaluation of chemicals cytotoxicity plays fundamental role in many in vitro investigations. The way of assessment of cytotoxicity depend on aim of study, characteristic of used cells and mode of action of investigated chemicals. The principal aspect of these investigations is validation of used method.

Measles vaccine efficacy during an epidemic in 1998 in the highly vaccinated population of Poland.

A measles epidemic with 2255 reported cases occurred in Poland between November 1997 and July 1998, despite high vaccination coverage since the 1980s. Cases occurred at all ages less than 30 years but showed two distinct peaks: young, unvaccinated children born in 1996-1997 and once vaccinated young adults born 1976-1982. The 60% of cases were among persons aged 15 years or more.