Bovine herpesvirus type 4 (BoHV‑4) is a common virus in the world that is detected in clinically ill or in apparently healthy cattle. This study provides a molecular characterization of BoHV‑4 ...strains from 24 cattle some showing respiratory and/or reproductive problems and some without any apparent clinical sign. This study also reported the growth properties of five BoHV‑4 field isolates. The 24 sampled cattle came from 13 different herds in 10 provinces collected between 2007 and 2018. Phylogenetic analysis using partially amplified nucleotide sequences of ORF8 genes coding glycoprotein B (n = 24) and ORF3 genes coding thymidine kinase (n = 9), demonstrated genetic variability among the BoHV‑4 strains analysed. The partial gB gene sequences clustered in three different genotypes (genotype I, II and III) were located within the genotype I cluster, such as Movar strain. The analysis of the five BoHV‑4 strains isolated from vaginal swabs (n = 2), nasal swab (n = 1), and brain samples (n = 2) revealed no significant differences in their growth properties in MDBK cell culture.
In this report we examined the presence of specific antibodies against equine herpesvirus type 1 (EHV-1), and equine herpesvirus type 4 (EHV-4) in several equidae, including mules, donkeys, horses. ...The presence of EHV-1 and EHV-4 in respiratory diseases of equids, and ability of multiplex nested polymerase chain reaction (PCR) screening in simultaneous diagnosis of horses acutely infected by EHV-1 and EHV-4 were also investigated. Sera from 504 horses, mules and donkeys sampled were tested for the presence of EHV-1 and EHV-4 specific antibodies. Blood samples taken from 21 symptomatic horses and nasal swabs taken from 40 symptomatic horses were tested for the presence of EHV-1 and EHV-4 by a multiplex nested PCR. A total of 14.3% (3/21) of buffy coat samples and 32.5% (13/40) nasal swab samples were found to contain EHV-1 DNA, while 19% (4/21) buffy coat samples and 22.5% (9/40) nasal swab samples were found to be positive for EHV-4 DNA. By species, 14.5% of horses, 37.2% of mules and 24.2% of donkeys tested were EHV-1 seropositive. EHV-4 specific antibodies were detected in 237 (81.7%) of 290 horse sera tested. Results from this investigation demonstrate that EHV-1 and EHV-4 are prevalent throughout the equid population, and that donkeys and mules might also represent an important source of infection for other equids. We also showed that the multiplex nested PCR assay might be useful for diagnosis of mixed respiratory infections in horses due to EHV-1 and EHV-4.
In this study, we have investigated the seroprevalence of alphaherpesvirus (BoHV-1 and CpHV-1) infections in selected goat flocks using glycoprotein B (gB)/glycoprotein E (gE) ELISA combination and ...virus neutralisation test (VNT). For this purpose, we collected blood serum samples of 546 Saanen goats from Bolu province and tested them by ELISA and VNT. Using ELISA, 32.05% (175/546) of the samples were found to be gB(+)/gE(-) for CpHV-1, whereas only 0.73% (4/546) of the samples were noted to be gB(+)/gE(+) for BoHV-1 releated infection. By performing VNT, we found 31.86% (174/546) and 3.29% (18/546) positivity for CpHV-1 and BoHV-1, respectively. In conclusion, prevalence of CpHV-1 infection was found to be higher than BoHV-1 infection in sampled goat flocks. For diagnosis of alphaherpesviruses in the goats, use of gB blocking ELISA test was found to be favorable as an alternative method. On the other hand, to distinguish between the CpHV-1/BoHV-1, gE blocking ELISA in combination by VNT was found to be incompatible with the statistical analysis (p<0.001). Considering antigenic cross-reactions between these viruses, because of the incompatibility of these tests, using a more sensitive/specific method to determine CpHV-1 and BoHV-1 antibodies can be suggested.
Ruminant işletmelerinde öncelikli hedef yüksek et ve süt veriminin yanı sıra sağlıklı yavru elde edilmesi ve bu şekilde karlılık oranının arttırılmasıdır. Sığırlarda erken embriyonik ölümler, ...abortlar, fötal mumifikasyon ve anomalili yavru doğumları sonucunda önemli ekonomik kayıplarla karşılaşılmaktadır. Bu olgulara neden olan etkenler arasında viruslar önemli bir paya sahiptir. Viral enfeksiyonlarda tedavi şansının az olması, hastalığın kısa sürede birçok hayvana yayılmasından dolayı primer olarak aborta neden olan viral etkenlerin belirlenmesi oldukça önemlidir. Viruslar uterusa kan-plasenta yoluyla, tohumlama-çiftleşme esnasında enfekte semen yoluyla geçebilir. Bu etkenlerin en yaygın görülenleri ve sığırlarda primer abort etkenleri Bovine herpes virus-1 (BoHV-1), Bovine viral Diarrhea Virus (BVDV), Bovine herpes virus-4 (BoHV-4), Mavidil, Akabane ve son yıllarda ülkemizde de tespit edilen Schmallenberg virus (SBV) enfeksiyonlarıdır. Bu virusların yanı sıra sığırlarda abort etkeni olarak Rift Valley Fever (RVFV), Epizootic hemorajik disease virus (EHDV), Aino Virus, Wesselborn Virus, Lumpy skin disease (LSD), Bovine parvovirus da sayılabilmektedir. Bu derlemede, sığırlarda primer olarak aborta neden olan viruslar ve abort olgularının oluşumundaki rolleri ile söz konusu viruslara karşı kontrol/eradikasyon yöntemleri irdelenmiştir.
The aim of this study was to investigate the presence of equid herpesviruses and to elucidate the possible mutual effects of equid alpha and gammaherpesviruses in an outbreak of respiratory tract ...disease in foals in a private pension stable (transient residency stable), Turkey. For this purpose, nasal swabs (n=21) and peripheral blood leukocytes (n=28) from 28 foals with respiratory tract diseases, and tissue samples from one dead foal were tested for equid herpesvirus-1, -4, -2 and -5 by multiplex nested PCR targeting the glycoprotein B (gB) gene. Of the 29 sampled animals, 3.4% (1/29), 58.6% (17/29), 58.6% (17/29) and 75.9% (22/29) were found positive for EHV-1, EHV-4, EHV-2 and EHV-5, respectively. Especially, a high ratio of multiple infections (75.9%; 22/29) caused by EHV-4, EHV-2 and EHV-5 were detected in the tested foals. The phylogenetic analysis showed that our equid gammaherpesviruses had a high degree of genetic heterogeneity, in contrast to our EHV-4 strains analyzed.
Equid herpesvirus 1 (EHV-1) is a major agent of large-scale outbreaks of abortion, and these abortions have been described as sporadic or epidemic cases in mares, generally during the last trimester ...of pregnancy. In this study, the partial characterization based on the glycoprotein B (gB) gene of Turkish (TR) EHV-1 field strains isolated from an abortion outbreak during the 2011 foaling season in Turkey was investigated using a novel designed primer set for EHV-1. The molecular analysis of TR EHV-1 strains showed that genetically identical TR EHV-1 strains were still circulating in Turkey during different years and, these strains were closely related to the European EHV-1 strains. Furthermore, EHV-1 isolated in the present study and to EHV-1 strains published previously in the GenBank database were shown some differences for the aa sequences. This molecular report would be valuable for monitoring of EHV-1 infection in Turkey and determining the gB gene sequence of newly identified EHV-1 field strains from future outbreaks on the pathogenesis and severity of disease.
Papillomaviruses (PVs) are epitheliotropic viruses that cause benign proliferative lesions in the skin (warts or papillomas) and mucous membranes of their natural hosts. In bovines specifically, 13 ...types of Bovine papillomaviruses (BPVs) are currently described in the literature, although the actual number may be greater than 20. BPV types are classified into four genera based on homology within the genomic regions of the L1 ORF, the most conserved sequence. This study conducted molecular typing of BPV in dairy cows with different papillomatosis cases and investigated the presence of co-infections across distinct BPV types in the same sample. After carrying out PCR using degenerate primers and type specific primers, 35 BPV suspected samples were detected as positive for BPV and these samples were used for typing using sequence analysis/PCR with type-specific primers. This analysis identified BPV-1, -2, -3, -4, -6, -7, -9 and -10, new putative types (BPV/BR/UEL6-like viruses) and the previously described putative type viruses (BAPV-6) in the 35 BPV-positive samples. In addition, co-infections across different BPV types were widely detected in the BPV-positive samples. This study shows that PCR assays using degenerate primers to amplify partial fragments of the L1 gene followed by sequencing is useful for genotyping BPV. However, results need confirmation using type-specific primers in order to consider co-infections. In addition, this study identified a new putative type (in the same cluster as BPV/BR/UEL6-like viruses) and the previously described putative type viruses (BAPV-6) in teat papillomatosis of Turkish dairy cows. The study shows that it is essential to identify BPV types and their prevalence/distribution, and also to determine the clinical consequences of infection for the development of prophylactic and/or therapeutic procedures.
Papillomaviruses can cause benign or malignant proliferations on the host's skin and mucous membranes. Recent genetic studies have identified many new papillomavirus types. In this study, molecular ...detection and typing was performed on papilloma samples from eight hair goats with teat papillomatosis. The papilloma samples were tested with degenerate (FAP59/FAP64,MY09/MY11) and type-specific primers. One sample was positive with degenerate (MY09/MY11) and two samples were positive with Caprahircus papillomavirus-1 type specific primers. The MY09/MY11 primer sequence indicated identity to the closest Ovine papillomavirus type-2 (77.9%). The ChPV-1 primer sequence was similar to the closest ChPV-1 (99.4%). Investigating papillomavirus types in different animal species is important for determining the evolution, prevalence, host range, and interspecies transmission potential of papillomaviruses, and to indicate suitable therapeutics for later development.
Bovine leukemia virus (BLV) is known as the etiological agent of Enzootic bovine leukosis (EBL), which is the most common neoplastic disease of cattle. While the major route of virus transmission is ...believed to be iatrogenic, BLV proviral DNA has been identified in biological materials, including nasal secretions, saliva, milk, colostrum, and semen, and in several insect species, including horses flies. However, insects' role in the natural transmission of BLV has not been clearly demonstrated. This study assessed the possible role of midges – Culicoides spp. – in BLV transmission. BLVs were genetically characterized and BLV infection seroprevelance was determined in 224 cattle sampled from 27 different small family herds in five different districts in Hatay province, southern Turkey. Out of the 25 Culicoides spp. pools, one (4.0%; 1/25) was a C.schultzei pool while 2.67% (6/224) of the sampled cattle were positive for BLV nucleic acid. The seroprevalance rates for the sampled herds and all sampled cattle were 7.40% (2/27) and 1.33% (3/224), respectively. According to the phylogenetic analysis, the sequences of the BLVs from the cattle (n = 6) and the one BLV-positive C.schultzei pool clustered on genotype 1 (G1) BLVs. Although these results do not reveal the exact role of Culicoides spp. or other midges flies in BLV transmission, the simultaneous presence of same substitions in BLVs from both cattle and a C.schultzei pool is noteworthy. Further studies on the env gene and other BLV gene regions detected from cattle and C.schultzei pools are ongoing to understand the possible epidemiological relationship between cattle and flies.
•Bovine leukemia virus (BLV) is is the most common neoplastic disease of cattle.•Major route of virus transmission is believed to be iatrogenic, BLV proviral DNA has been identified in biological materials.•Insects' role in the natural transmission of BLV has not been clearly demonstrated.•This study assessed the possible role of midges – Culicoides spp. – in BLV transmission.•This study investigated the presence of BLV in Culicoides spp.•The potential of Culicoides spp. as a risk factor for BLV transmission under natural conditions in dairy cattle farms in Turkey.•It also determined the seroprevalence of BLV infection and provided the genetic characterization of BLVs from cattle and one Culicoides schultzei pool to analyze the possible interaction between Culicoides spp. and BLV infection.
Papillomaviruses (PVs) are epitheliotropic viruses that cause benign proliferative lesions in the skin (warts or papillomas) and mucous membranes of their natural hosts. Recently, new PVs have been ...found in many animal species. The most common current approach for identifying novel PV types is based on PCR, using various consensus or degenerated primer (broad-range primers), designed on the basis of the multiple alignment of nucleotide or amino acid sequences of a large number of different human papillomaviruses (HPV). PVs have been classified according to the sequence similarity of one of their capsid proteins, L1, without taking into account other regions of the genome and without considering the phenotypic characteristics of the viral infection. In this study, we performed molecular detection and typing of a PV in a goat with teat papillomatosis. Firstly, PCR was performed using the FAP59/FAP64 and MY09/MY11 primer pairs for the L1 gene region. The PV DNA was found to be positive only with the FAP59/FAP64 primer pair. PV DNA was then tested with three primer sets in four different combinations (L2Bf/FAP64, L2Bf/L1Br, FAP59/FAP64, L1Bf/LCRBr) for the gene region encoding the L1, L2 and LCR proteins. The goat teat papilloma sample was amplified using FAP59/FAP64 primers and two primer pairs (L2Bf/FAP64 and L2Bf/L1Br). We obtained products matching approximately 604 bp of the L1 region of the virus. PV DNA was used for typing using sequence analysis/PCR with some type-specific primers for bovids, caprids and cervids. The results of the sequence analysis suggested one new putative PV type with sequence identity ranging from 46.45 to 80.09% to other known papillomaviruses, including Capra hircus papillomavirus (ChPV-2), bovine papillomavirus (BPV) 6, 7, 10, 11 and 12, Rangifer tarandus papillomavirus 3 (RtPV-3) and BPV-7Z (Alpine wild ruminant papillomavirus; Cervus elaphus papillomavirus). We therefore propose that this is the first identification of a new putative type, MG523274 (HTY-goat-TR2016), in a goat with teat papillomatosis. It is essential to identify PV types in different animal species and investigate their prevalence/distribution and clinical consequences in order to develop appropriate prophylactic and/or therapeutic procedures and to determine the interspecies transmission potential and evolution of PVs.
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