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  • Author or Editor: Petra Forgách x
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Authors: Gábor Reuter, Domonka Fodor, Petra Forgách, Andrea Kátai and György Szűcs

A hepatitis E-vírus (HEV) az egyik leggyakoribb, széklettel terjedő, hepatitist okozó ágens a fejlődő országokban. A fejlett országokban a vírus szórványos emberi megbetegedésekből és házisertésekből való kimutatása azonban felveti a HEV zoonosis útján való terjedését is. Célkitűzés: A hepatitis E-vírus kimutatása emberben, házi- (sertés, szarvasmarha) és vadon élő (vaddisznó, őz) állatokban, és a vírus molekuláris epidemiológiája hazánkban. Módszer: A szerzők a 2001 és 2006 között a szegedi városi kórház infektológiai osztályán ismeretlen eredetű hepatitisben szenvedő betegek szérummintáit HEV ELISA módszerekkel előszűrték, majd a HEV-IgM-pozitív szérummintákat és az állati bélsár-, máj-, valamint bélmintákat RT-PCR módszerekkel vizsgálták. Eredmények: Összesen 116 (9,6%) beteg szérummintája tartalmazott HEV-IgM ellenanyagot. Ötvenhárom HEV-IgM-pozitív szérummintából 13-ban (24,5%) a HEV is kimutatható volt RT-PCR és szekvenálási módszerekkel. A sertésmintákból 42 minta (bélsár: 22,7%, máj: 30,8%), az őzmintákból 11 (máj: 34,4%) és a vaddisznómintákból 9 minta (máj: 12,2%) mutatott RT-PCR-pozitivitást. Egy Indiából importált 1-es genotípusú HEV víruson kívül minden további HEV (12 humán, 19 sertés, 3 őz, 2 vaddisznó) a 3-as genotípusba tartozik. Genetikailag megegyező szekvenciájú HEV-et lehetett kimutatni őzből és egy emberi fertőzésből, továbbá két-két emberi fertőzésből. Megbeszélés: A HEV endémiásan jelen lévő kórokozó. A nyers vagy nem kellően hőkezelt hústermékek (házi és vadhús) elfogyasztása a legvalószínűbb forrása a hazai szórványos hepatitis E-fertőzéseknek. A 3-as genotípusú HEV-ek okozta endémiás humán fertőzések fajokon keresztüli zoonosisok, amelyek élelmiszerek közvetítésével terjednek hazánkban.

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Adenoviral nucleic acid was detected by polymerase chain reaction (PCR) in formalin-fixed paraffin-embedded tissue samples of a cat that had suffered from disseminated adenovirus infection. The identity of the amplified products from the hexon and DNA-dependent DNA polymerase genes was confirmed by DNA sequencing. The sequences were clearly distinguishable from corresponding hexon and polymerase sequences of other mastadenoviruses, including human adenoviruses. These results suggest the possible existence of a distinct feline adenovirus.

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Authors: Nedjeljko Karabasil, Nikola Čobanović, Ivana Vučićević, Silvana Stajković, Zsolt Becskei, Petra Forgách and Sanja Aleksić-Kovačević

The aim of this study was to determine the association of lung lesions with carcass and meat quality traits in slaughter pigs and to describe the main morphological features associated with lung lesions. Macroscopic lesions on the lungs were detected in 67.09% of a total of 79 pigs examined. Histopathological examination revealed that acute and chronic interstitial pneumonia represented the commonest changes, detected in 26.67% and 33.33% of the cases, respectively. Bronchopneumonia was found in 33.33% of the cases. By immunohistochemical examination, 26.67% of the lungs showed the presence of severe peribronchiolar and perialveolar infiltration composed predominantly of CD3+ T lymphocytes, which finding may be indicative of viral pneumonia. Regarding the production traits, it was confirmed that pigs with severe lung lesions had the lowest liveweight, hot carcass weight and meatiness, the highest pH value 45 min after slaughtering (pH45) and the highest incidence of dark, firm, dry (DFD) and pale, soft, exudative (PSE) meat. The presence of lung lesions significantly downgraded carcass value and caused a significant deterioration in pork quality.

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Authors: Károly Erdélyi, János Gál, László Sugár, Krisztina Ursu, Petra Forgách, Levente Szeredi and Theodora Steineck

Oval, firm, cutaneous tumours with a rough, hairless, pigmented surface, exhibiting a moderately pronounced papillary structure were detected on the abdominal skin of two young red deer ( Cervus elaphus ). One animal was shot in Lower Austria in 2004, the other at a deer farm in Hungary in 2007. Histological examination of both samples classified the tumours as fibropapillomas, showing marked proliferation of fibroblasts and connective tissue, accompanied by hyperkeratosis, parakeratosis and acanthosis of the overlaying epidermis, and occasional foci of inflammation. The distribution of cytokeratin and vimentin was characterised in the lesion. The presence of papillomavirus (PV) antigen was demonstrated by immunohistochemistry in both cases. Papillomavirus-specific DNA was successfully amplified by PCR from one sample. The obtained partial nucleotide sequence of the L2 ORF exhibited the highest critical identity values with the homologous regions of Delta-papillomaviruses, especially the Roe deer papillomavirus (93%). Phylogenetic analysis of the partial L2 ORF sequence alignment of 10 papillomaviruses by both neighbour-joining and maximum parsimony method confirmed that the Red deer PV is very closely related to the Western roe deer papillomavirus (CcPV1).

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Authors: Zsuzsanna Tapaszti, Petra Forgách, Csaba Kővágó, László Békési, Tamás Bakonyi and Miklós Rusvai

Microsporidiosis (nosema disease) of the European honeybee ( Apis mellifera L.) is present in bee colonies worldwide. Until recently, Nosema apis had been regarded as the causative agent of the disease, which may have many negative effects on the colony and cause heavy economic losses in apicultures. Another microsporidium species, Nosema ceranae , was reported to infest the Asian honeybee ( Apis ceranae ), but both honeybee species are susceptible to both microsporidia. In the European honeybee N. ceranae was first detected in Spain in the year 2006. As it is difficult to distinguish N. ceranae and N. apis morphologically, a rapid and accurate assay has been developed to differentiate N. apis and N. ceranae based on polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) of the partial large subunit ribosomal RNA. The assay was tested on 38 Nosema -infested bee samples, which were collected from geographically distant Hungarian bee colonies representing all regions of the country. Only one sample contained N. apis , and in the other 37 samples N. ceranae was detected, which indicates the dominance of N. ceranae in Hungarian apiaries. This is the first report on the presence of N. ceranae in Hungary.

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Authors: Csaba Kővágó, Petra Forgách, Ágnes Szabára, Míra Mándoki, Ákos Hornyák, Conor Duignan, Erzsébet Pásztiné Gere and Miklós Rusvai

Bovine viral diarrhoea (BVD) is a viral disease appearing in various forms and causing high economic losses in the cattle stocks of Hungary. The aim of the present study was to determine the prevalence of bovine viral diarrhoea virus (BVDV) in Hungary through a monitoring survey carried out on samples collected in cattle-keeping units throughout the country. Since no such survey had been carried out in Hungary during the last thirty years, our study may serve as a basis for later monitoring investigations aimed at following the progress of an expected eradication campaign of BVD. The tests were carried out using an ELISA method, on a total of 1200 blood samples submitted from 54 cattle herds. The herds had not been vaccinated against BVDV before the sampling. Out of the 1200 samples, 521 proved to be positive (43.4%), 40 gave doubtful result (3.3%) and 639 were negative (53.3%). In some stocks the samples were collected from cows having completed several lactation periods, and therefore the seronegativity indicates the BVDV-free status of the given stock. Moreover, among the positive herds we found a few where the seropositivity rate was rather low (< 5%). According to the results of the survey, a rather high portion (about one third) of the cattle-keeping units of Hungary can be regarded as BVDV free, which ratio is much higher than had been expected on the basis of surveys carried out on a lower number of samples and in smaller regions of the country. Hence, the chances of an eradication campaign launched in the near future, or carried out parallel to the IBR eradication programme, are better than previously expected.

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Authors: Krisztián Bányai, Jelle Matthijnssens, György Szücs, Petra Forgách, Károly Erdélyi, Marc van Ranst, Eleonora Lorusso, Nicola Decaro, Gabriella Elia and Vito Martella

In rotaviruses, intragenic recombination or gene rearrangement occurs almost exclusively in the genome segments encoding for non-structural proteins. Rearranged RNA originates by mechanisms of partial sequence duplications and deletions or insertions of non-templated nucleotides. Of interest, epidemiological investigations have pointed out an unusual bias to rearrangements in genome segment 11, notably in rotavirus strains of lapine origin, as evidenced by the detection of numerous lapine strains with super-short genomic electropherotype. The sequence of the full-length genome segment 11 of two lapine strains with super-short electropherotype, LRV-4 and 3489/3, was determined and compared with rearranged and normal cognate genome segments of lapine rotaviruses. The rearranged genome segments contained head-to-tail partial duplications at the 3′ end of the main ORF encoding NSP5. Unlike the strains Alabama and B4106, intermingled stretches of non-templated sequences were not present in the accessory RNA of LRV-4 and 3489/3, while multiple deletions were mapped, suggesting the lack of functional constraints. Altogether, these findings suggest that independent rearrangement events have given origin to the various lapine strains that have super-short genome pattern.

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