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1.
Parasitol Res ; 119(2): 519-527, 2020 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-31848746

RESUMEN

Rodents are popular companion animals and are often kept as pets for children. However, they can be reservoirs of a variety of zoonotic pathogens. As little attention is being paid to the possibility of acquiring parasitic infections from pet rodents, the occurrence of Hymenolepis nana in rodents from pet shops and breeding clubs of Slovakia was surveyed, with parallel genetic analyses to type isolates from rodent species. In 2016-2018, pooled faecal samples from 119 boxes with 228 mice, 191 rats, 124 hamsters and 25 Mongolian gerbils were collected from 12 pet shops and 3 breeding clubs in five cities of eastern Slovakia. H. nana eggs were detected in 25 (21.0%) boxes. Animals from pet shops were infected more frequently (24.6% positive boxes) than those from breeding clubs (17.2%), without statistical significance. The highest prevalence was recorded in rats from pet shops, where 41.7% of boxes contained parasite eggs. Hamsters and mice in pet shops were also frequently infected; in 23.8% and 25% of boxes, respectively, H. nana eggs were observed. Prevalence in rats and hamsters from breeding clubs was lower, but in mice surpassed 40%. Nine samples with positive PCR products in any of the four DNA regions, mitochondrial cox1 and nuclear pmy, ITS1 and ITS2 targets, gave profiles characteristic of H. nana. The results imply the risk of zoonotic transmission of hymenolepiasis in Slovakia. Particular attention should be given to hygiene level maintained while keeping rodents. Furthermore, rodents intended for sale should be tested for parasites and then dewormed.


Asunto(s)
Himenolepiasis/veterinaria , Hymenolepis nana/aislamiento & purificación , Mascotas/parasitología , Enfermedades de los Roedores/parasitología , Animales , Niño , Heces/parasitología , Humanos , Himenolepiasis/parasitología , Hymenolepis nana/genética , Ratones , Reacción en Cadena de la Polimerasa , Prevalencia , Ratas , Eslovaquia , Encuestas y Cuestionarios
2.
Trop Anim Health Prod ; 51(4): 791-798, 2019 May.
Artículo en Inglés | MEDLINE | ID: mdl-30456692

RESUMEN

Bovine viral diarrhea virus (BVDV) is a worldwide spreading pestivirus affecting cattle and other ruminants; however, there have been few reports on epidemiologic investigation of BVDV in eastern China. In this study, bulk tank milk from 36 herds of dairy cattle in eastern China was submitted to serological investigations, 77.8% of herds was BVDV antibody positive. Individual animal status in two herds was further investigated collecting blood samples, the positive ratio was 49.74% and 24.64%, and the average positive ratio of calves, heifers, and lactating cows was 15.94%, 40.16%, and 41.7%, respectively. Moreover, clinical survey was carried out among 8170 dairy cattle from 36 herds, for diarrhea syndrome, respiratory problems and reproductive failure, and pathogens of all clinical cattle were further investigated. The results showed that BVDV was one of the main pathogen, which infected animals combining with various other viruses. Then, nine BVDV strains were isolated; phylogenetic analysis showed that BVDV subtypes currently circulating in eastern China were BVDV 1a and BVDV 1c. In addition, out of 377 cows tested, the 1.86% detected positive to the BVDV antigen. This study provided the foundation of further study on vaccination and control strategies of BVDV in eastern China.


Asunto(s)
Anticuerpos Antivirales/sangre , Diarrea Mucosa Bovina Viral/epidemiología , Virus de la Diarrea Viral Bovina Tipo 1/aislamiento & purificación , Animales , Diarrea Mucosa Bovina Viral/prevención & control , Diarrea Mucosa Bovina Viral/virología , Bovinos , China/epidemiología , Industria Lechera , Virus de la Diarrea Viral Bovina Tipo 1/genética , Virus de la Diarrea Viral Bovina Tipo 1/inmunología , Femenino , Leche/virología , Filogenia , Prevalencia , Vacunación/veterinaria
3.
J Hered ; 107(2): 115-21, 2016 03.
Artículo en Inglés | MEDLINE | ID: mdl-26585380

RESUMEN

Systemic amyloid A (AA) amyloidosis is a major cause of morbidity and mortality among captive cheetahs. The self-aggregating AA protein responsible for this disease is a byproduct of serum amyloid A (SAA) protein degradation. Transcriptional induction of the SAA1 gene is dependent on both C/EBPß and NF-κB cis-acting elements within the promoter region. In cheetahs, 2 alleles exist for a single guanine nucleotide deletion in the putative NF-κB binding site. In this study, a novel genotyping assay was developed to screen for the alleles. The results show that the SAA1A (-97delG) allele is associated with decreased SAA protein concentrations in the serum of captive cheetahs (n = 58), suggesting genetic differences at this locus may be affecting AA amyloidosis prevalence. However, there was no significant difference in the frequency of the SAA1A (-97delG) allele between individuals confirmed AA amyloidosis positive versus AA amyloidosis negative at the time of necropsy (n = 48). Thus, even though there is evidence that having more copies of the SAA1A (-97delG) allele results in a potentially protective decrease in serum concentrations of SAA protein in captive cheetahs, genotype is not associated with this disease within the North American population. These results suggest that other factors are playing a more significant role in the pathogenesis of AA amyloidosis among captive cheetahs.


Asunto(s)
Acinonyx/genética , Amiloidosis/genética , Amiloidosis/veterinaria , Proteína Amiloide A Sérica/genética , Animales , Animales Salvajes/genética , Animales de Zoológico/genética , Sitios de Unión , Gatos , Femenino , Frecuencia de los Genes , Variación Genética , Genética de Población , Genotipo , Técnicas de Genotipaje , Amiloidosis de Cadenas Ligeras de las Inmunoglobulinas , Masculino , Regiones Promotoras Genéticas , Proteínas Serina-Treonina Quinasas/metabolismo , Análisis de Secuencia de ADN , Quinasa de Factor Nuclear kappa B
4.
Food Microbiol ; 50: 78-82, 2015 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-25998818

RESUMEN

This study reports the isolation of Tetragenococcus koreensis, a bacterial species currently represented only by the type strain isolated from kimchi, from a raw fermented and ripened Italian sausage, Ventricina Vastese, all over the ripening period of five months. Rep-PCR genotyping showed that different T. koreensis strains, identified by sequencing of the 16S rRNA gene, were present in the same production batch. Tests on representative isolates showed intra-species physiological variability and the possession of phenotypic traits relevant for the production of fermented sausages, i.e. ability to grow at high salt concentrations, to induce some changes in the peptide profile of the culture medium and inability to produce histamine and tyramine, confirmed by the absence of the respective decarboxylase genes. Therefore the opportunity to further investigate the suitability of T. koreensis as a starter for fermented meat products was suggested.


Asunto(s)
Enterococcaceae/genética , Enterococcaceae/aislamiento & purificación , Productos de la Carne/microbiología , Microbiota , Carboxiliasas/genética , Carboxiliasas/metabolismo , Medios de Cultivo/química , Enterococcaceae/crecimiento & desarrollo , Enterococcaceae/metabolismo , Fermentación , Variación Genética , Genotipo , Histamina/metabolismo , Filogenia , Reacción en Cadena de la Polimerasa , ARN Ribosómico 16S/genética , Análisis de Secuencia de ADN , Cloruro de Sodio , Tiramina/metabolismo
5.
Food Microbiol ; 45(Pt A): 103-10, 2015 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-25481066

RESUMEN

Geobacillus stearothermophilus is the main thermophilic spore former involved in flat sour spoilage of canned foods. Three typing methods were tested and applied to differentiate strains at intra-species level: panC sequence analysis, REP-PCR and M13-PCR. panC gene was highly conserved within the studied strains, suggesting a low intra-specific diversity. This was supported by REP-PCR primary assays and M13-PCR results. M13-PCR profile analysis succeeded in differentiating six closely related groups (at 79% threshold similarity) among 127 strains from a range of spoiled canned food products and from different canneries. Phenotypic traits were investigated among 20 selected strains representing groups and origins. Ranges of growth under different temperatures (from 40 °C to 70 °C), pH (from 5.0 to 6.5), NaCl concentrations (from 1 to 5%) and sporulation conditions poorly differed between strains, but wet heat resistance of spores showed a 20-fold variation between strains. Furthermore, in this study, strains that belonged to the same M13-PCR genetic group did not share phenotypic characteristics or common origin. The work emphasizes a low diversity within the G. stearothermophilus species but data from this study may contribute to a better control of G. stearothermophilus spoilage in canned food.


Asunto(s)
Microbiología de Alimentos , Alimentos en Conserva/microbiología , Variación Genética , Geobacillus stearothermophilus/aislamiento & purificación , Secuencia de Bases , Análisis por Conglomerados , Genotipo , Geobacillus stearothermophilus/clasificación , Geobacillus stearothermophilus/genética , Geobacillus stearothermophilus/fisiología , Calor , Concentración de Iones de Hidrógeno , Datos de Secuencia Molecular , Fenotipo , Análisis de Secuencia de ADN , Cloruro de Sodio/farmacología , Esporas Bacterianas
6.
AJR Am J Roentgenol ; 203(4): W391-9, 2014 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-25247968

RESUMEN

OBJECTIVE: NUT midline carcinoma is a rare poorly differentiated aggressive subtype of squamous cell carcinoma. To date, fewer than 100 total cases have been reported. CONCLUSION: Given the rarity of this disease process and lack of pathognomonic imaging findings, a definitive diagnosis based solely on imaging findings alone is untenable. Select cases are used to emphasize the particularly infiltrative and aggressive nature of NUT midline carcinoma, which shows a complete disregard for normal tissue boundaries and rapid progression during brief intervals.


Asunto(s)
Carcinoma de Células Escamosas/diagnóstico , Diagnóstico por Imagen/métodos , Neoplasias de los Tejidos Blandos/diagnóstico , Adulto , Carcinoma de Células Escamosas/genética , Femenino , Humanos , Masculino , Persona de Mediana Edad , Proteínas de Neoplasias , Proteínas Nucleares/genética , Proteínas Oncogénicas/genética , Neoplasias de los Tejidos Blandos/genética , Adulto Joven
7.
Avian Dis ; 68(3): 202-208, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-39400214

RESUMEN

Avian nephritis virus (ANV), which belongs to the family Astroviridae, is associated with different clinical manifestations (enteric and kidney disorders) in poultry. Despite being a significant pathogen of the avian industry worldwide, information regarding genetic features of these viruses in India is scarce. In this study, 386 intestinal samples collected from 37 slaughterhouses in two north Indian states (Rajasthan and Haryana) were screened for ANV with reverse transcription PCR (RT-PCR) targeting the conserved ORF1b gene, followed by nucleotide sequencing of the amplified product. RT-PCR and sequencing confirmed the presence of ANV in 32 clinical samples (8.29%), with concurrent infections of infectious bronchitis virus, chicken astrovirus, and fowl adenoviruses observed in some clinical samples (n = 4). Virus isolations were successful from four out of 12 ANV-positive clinical samples passaged via the yolk-sac route in specific-pathogen-free embryonated chicken eggs. Additionally, the near-complete genomes of two viruses were determined through sequencing. Phylogenetic analysis based on full-length capsid protein sequences classified the viruses into ANV genotype 4 (ANV4), and to the best of our knowledge this is the first report of ANV4 from India. This study revealed the presence and circulation of new strains of ANV in Indian poultry. Genetic profiling and isolation of the viruses in this study will not only aid in the development of diagnostic tools and vaccines for ANV but also offer valuable insights into its epidemiology.


Primer aislamiento y caracterización genética del virus de la nefritis aviar 4 en la avicultura comercial de la India El virus de la nefritis aviar (ANV), que pertenece a la familia Astroviridae, se asocia con diferentes manifestaciones clínicas (trastornos entéricos y renales) en la avicultura. A pesar de ser un patógeno importante de la industria avícola en todo el mundo, la información sobre las características genéticas de estos virus en la India es escasa. En este estudio, se analizaron 386 muestras intestinales recolectadas en 37 plantas de procesamiento en dos estados del norte de la India (Rajasthan y Haryana) para detectar al virus de la nefritis aviar mediante un método de RT-PCR dirigido al gene conservado ORF1b, seguido de la secuenciación de nucleótidos del producto amplificado. El método de RT-PCR y la secuenciación confirmaron la presencia del virus de la nefritis aviar en 32 muestras clínicas (8.29%), observándose infecciones concurrentes por el virus de la bronquitis infecciosa, astrovirus del pollo y adenovirus de las aves en algunas muestras clínicas (n = 4). Los aislamientos del virus tuvieron éxito en cuatro de las 12 muestras clínicas positivas para el virus de la nefritis aviar inoculadas a través de la ruta del saco vitelino en huevos de gallina embrionados libres de patógenos específicos. Además, se determinaron los genomas casi completos de dos virus mediante secuenciación. El análisis filogenético basado en secuencias completas de proteínas de la cápside clasificó los virus en el genotipo 4 del virus de la nefritis aviar (ANV4) y hasta donde se sabe, este es el primer informe del virus de la nefritis aviar 4 en la India. Este estudio reveló la presencia y circulación de nuevas cepas del virus de la nefritis aviar en la avicultura comercial de la India. El perfil genético y el aislamiento de los virus en este estudio no solo ayudarán en el desarrollo de herramientas de diagnóstico y vacunas para el virus de la nefritis aviar, sino que también ofrecerán información valiosa sobre su epidemiología.


Asunto(s)
Infecciones por Astroviridae , Avastrovirus , Pollos , Filogenia , Enfermedades de las Aves de Corral , Animales , India/epidemiología , Enfermedades de las Aves de Corral/virología , Enfermedades de las Aves de Corral/epidemiología , Avastrovirus/genética , Avastrovirus/aislamiento & purificación , Avastrovirus/clasificación , Infecciones por Astroviridae/veterinaria , Infecciones por Astroviridae/virología , Infecciones por Astroviridae/epidemiología , Genoma Viral
8.
Viruses ; 16(9)2024 Aug 30.
Artículo en Inglés | MEDLINE | ID: mdl-39339866

RESUMEN

Border disease virus (BDV) causes significant economic losses in sheep farming worldwide. In India, BDV has not yet been studied in sheep migrating for summer pasturing. This study aimed to determine the extent of BDV infection in migratory sheep and provide genetic characteristics of BDV. Blood and serum samples from 90 lambs of a migratory sheep flock (600) in Central India were collected and subjected to molecular detection, phylogenetic analysis and virus neutralization test (VNT). We detected BDV in two lambs through real-time RT-PCR, while 64.4% (58/90) of in-contact lambs had BDV neutralizing antibodies. One apparently healthy lamb was found to be persistently infected with BDV. Phylogenetic analysis of 5'-UTR and Npro genes and the concatenated datasets typed the BDV isolate from PI sheep as BDV-3 genotype. However, it showed a closer relationship with BDV-3 strains from China than the previously reported Indian BDV-3 strains. This is the first report on the detection of BDV persistently infected migratory sheep in India. Additionally, we provided evidence of genetic variability among BDV-3 strains in India. The findings improve our understanding of epidemiology and genetic characteristics of BDV in India and highlight the potential risks associated with the traditional practice of sheep migration for summer pasturing.


Asunto(s)
Enfermedad de la Frontera , Virus de la Enfermedad de la Frontera , Filogenia , Enfermedades de las Ovejas , Animales , India/epidemiología , Ovinos , Virus de la Enfermedad de la Frontera/genética , Virus de la Enfermedad de la Frontera/aislamiento & purificación , Virus de la Enfermedad de la Frontera/clasificación , Enfermedad de la Frontera/virología , Enfermedad de la Frontera/epidemiología , Enfermedades de las Ovejas/virología , Enfermedades de las Ovejas/epidemiología , Variación Genética , Anticuerpos Antivirales/sangre , Genotipo , Migración Animal , Anticuerpos Neutralizantes/sangre
9.
Vet Immunol Immunopathol ; 262: 110634, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-37517102

RESUMEN

An observational study describes an outbreak of bovine viral diarrhea virus (BVDV) in a dairy herd in Spain. The herd was subjected to a voluntary control program. In a sampling carried out in June 2020, bulk tank milk antibody levels increased compared to the previous sampling. Additionally, serum samples from 4 young heifers also tested positive for antibodies. Since the results were consistent with a recent infection, we proceeded to detect possible persistently infected (PI) animals using antigen ELISA (on serum/ear-notch samples), following the program guidelines. From this moment on, 42 animals tested positive for BVDV antigen, of which 17 were under typical acute infection (AI), 13 were deemed as PI, and eight died early on the farm before having information to determine their status. The remaining 4 showed intriguing test results consistent with a long-term AI since they tested BVDV positive in at least two antigen tests more than 3 weeks apart. Thus, one animal was positive until 80 days of age in serum, and others even for longer periods in ear-notch samples, until they finally tested negative for BVDV. Based on these results, longer follow-up may be necessary in BVDV positive animals to accurately confirm persistent infection.


Asunto(s)
Diarrea Mucosa Bovina Viral , Enfermedades de los Bovinos , Virus de la Diarrea Viral Bovina , Animales , Femenino , Bovinos , Granjas , España/epidemiología , Infección Persistente/veterinaria , Anticuerpos Antivirales , Diarrea/veterinaria , Enfermedades de los Bovinos/epidemiología
10.
Animals (Basel) ; 13(18)2023 Sep 14.
Artículo en Inglés | MEDLINE | ID: mdl-37760310

RESUMEN

Edwardsiella tarda is a crucial pathogenic bacterium in tropical aquaculture. This bacterium was recently isolated from tambaqui (Colossoma macropomum), a commercially important fish species in Brazil. This study assessed the antimicrobial susceptibility, pathogenicity, and genetic diversity of the tambaqui-derived E. tarda isolates. Fourteen bacterial isolates isolated from tambaqui were identified as E. tarda by using matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry and dnaJ gene sequencing. Antimicrobial susceptibility tests were conducted against seven drugs using the disc diffusion assay. The pathogenicity test conducted by intraperitoneal injection of 2.4 × 107 colony-forming units (CFU) fish-1 of E. tarda (ED38-17) into tambaqui juveniles eventually revealed that neither clinical signs nor death were present. However, splenomegaly and whitish areas in the spleen and kidneys were observed. The histological investigation also revealed granulomatous splenitis, nephritis, and hepatitis occurring internally. Repetitive extragenic palindromic-PCR fingerprinting separated the 14 isolates into three genetic groups. The antibiogram revealed that all E. tarda isolates were wild-type (WT) to florfenicol (FLO), norfloxacin (NOR), neomycin (NEO), erythromycin (ERY), and oxytetracycline (OXY); however, some were non-wild-type to sulfamethoxazole/trimethoprim (7.1%) and amoxicillin (21.4%). Therefore, through experimental infection, E. tarda ED38-17 could induce pathogenic effects in C. macropomum. Additionally, three distinct genetic types were found, and the E. tarda isolates were WT to FLO, NOR, NEO, ERY, and OXY. These findings raise awareness of a bacteria causing unseen lesions, a pathogen that will potentially impact tambaqui aquaculture in the future.

11.
Exploration (Beijing) ; 3(5): 20220175, 2023 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-37933281

RESUMEN

Gliomas are histologically and genetically heterogeneous tumors. However, classical histopathological typing often ignores the high heterogeneity of tumors and thus cannot meet the requirements of precise pathological diagnosis. Here, proximity-anchored in situ spectral coding amplification (ProxISCA) is proposed for multiplexed imaging of RNA mutations, enabling visual typing of brain gliomas with different pathological grades at the single-cell and tissue levels. The ligation-based padlock probe can discriminate one-nucleotide variations, and the design of proximity primers enables the anchoring of amplicons on target RNA, thus improving localization accuracy. The DNA module-based spectral coding strategy can dramatically improve the multiplexing capacity for imaging RNA mutations through one-time labelling, with low cost and simple operation. One-target-one-amplicon amplification confers ProxISCA the ability to quantify RNA mutation copy number with single-molecule resolution. Based on this approach, it is found that gliomas with higher malignant grades express more genes with high correlation at the cellular and tissue levels and show greater cellular heterogeneity. ProxISCA provides a tool for glioma research and precise diagnosis, which can reveal the relationship between cellular heterogeneity and glioma occurrence or development and assist in pathological prognosis.

12.
Braz J Microbiol ; 43(3): 923-30, 2012 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-24031908

RESUMEN

The objective of the present study was to determine the frequency of Staphylococcus aureus nasal carriage among dialysis and kidney transplant patients, to identify the antimicrobial resistance profile of these strains and to verify their genetic profiles with the RW3A primer. The study included 159 individuals, comprising 111 dialysis and 48 kidney transplant patients. Of the 48 transplant patients, 75% were positive for S. aureus, whereas 49% of the 111 dialysis patients were carriers. Two samples yielded conflicting results for oxacillin sensitivity between the disk diffusion and minimum inhibitory concentration (MIC) assays: both were sensitive by the disk diffusion assay and resistant by MIC (4 µg/ml). In the antibiogram by disk diffusion, ten samples were resistant to cefoxitin, among which eight were also resistant to oxacillin. The resistance of the ten samples to cefoxitin by the disk diffusion assay was confirmed by MIC. Of the ten oxacillin-resistant samples, eight harbored the mecA gene. All samples were sensitive to vancomycin, and most were resistant to penicillin and demonstrated high rates of resistance to the other antimicrobials tested. The samples from dialysis patients exhibited a more homogenous genetic profile. Among the samples with a high percent similarity, no correlation with sensitivity or resistance to oxacillin was observed. According to the results of this study, the implementation of prevention and control measures, such as increased restrictions on prescriptions for antimicrobial drugs and nasal decontamination prior to high-risk procedures, is recommended.

13.
Braz J Microbiol ; 52(1): 91-100, 2021 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-32734470

RESUMEN

Sporotrichosis is one of the neglected tropical diseases causing subcutaneous chronic granulomatous lesion by thermally dimorphic fungi belonging to Sporothrix species. Sporothrix brasiliensis, Sporothrix mexicana and Sporothrix globosa are the common pathogenic species. In Asian countries, S. globosa constitutes nearly 99.3% of all Sporothrix species. We studied 63 cases of sporotrichosis of geographically diverse origin from India and Sporothrix isolates were characterised for its growth in different media, temperatures, ability to assimilate sugars and antifungal susceptibility profile. Molecular characterization was performed by sequencing of the calmodulin (CAL), beta tubulin (BT) and translational elongation factor 1-alpha (TEF-1α) and typing by fluorescent amplified fragment length polymorphism (FAFLP). In patients who presented with fixed (49.2%), lymphocutaneous lesions (23.8%), in 26.9% the details were not known, none had systemic dissemination. All the isolates tested were Sporothrix globosa and that could grow up to 35 °C and unable to grow at and beyond 37 °C. The assimilation of sucrose, ribitol and raffinose helps in identifying S. globosa. Sequences of CAL or BT or TEF-1α can differentiate S. globosa from other species in the complex. FAFLP results exhibited low genetic diversity. No correlation was noted between genotypes and clinical presentation, or geographic distribution. Itraconazole, terbinafine and posaconazole showed good in vitro antifungal activity against S. globosa whereas fluconazole and micafungin had no activity. S. globosa of Indian origin is relatively less pathogenic than other pathogenic Sporothrix species as it does not cause systemic dissemination and in the diagnostic laboratory, incubation of the cultures below 37 °C is essential for effective isolation.


Asunto(s)
Sporothrix/genética , Sporothrix/aislamiento & purificación , Esporotricosis/microbiología , Adulto , Análisis del Polimorfismo de Longitud de Fragmentos Amplificados , Antifúngicos/farmacología , Femenino , Proteínas Fúngicas/genética , Genotipo , Humanos , India , Itraconazol/farmacología , Masculino , Pruebas de Sensibilidad Microbiana , Persona de Mediana Edad , Filogenia , Sporothrix/clasificación , Sporothrix/efectos de los fármacos
14.
Viruses ; 13(4)2021 04 12.
Artículo en Inglés | MEDLINE | ID: mdl-33921513

RESUMEN

Classical swine fever (CSF) is a highly contagious disease of swine caused by classical swine fever virus (CSFV). For decades the disease has been controlled in China by a modified live vaccine (C-strain) of genotype 1. The emergent genotype 2 strains have become predominant in China in the past years that are genetically distant from the vaccine strain. Here, we aimed to evaluate the current infectious status of CSF, and for this purpose 24 isolates of CSFV were identified from different areas of China during 2016-2018. Phylogenetic analysis of NS5B, E2 and full genome revealed that the new isolates were clustered into subgenotype 2.1d and 2.1b, while subgenotype 2.1d was predominant. Moreover, E2 and Erns displayed multiple variations in neutralizing epitope regions. Furthermore, the new isolates exhibited capacity to escape C-strain-derived antibody neutralization compared with the Shimen strain (genotype 1). Potential positive selection sites were identified in antigenic regions of E2 and Erns, which are related with antibody binding affinity. Recombination events were predicted in the new isolates with vaccine strains in the E2 gene region. In conclusion, the new isolates showed molecular variations and antigenic alterations, which provide evidence for the emergence of vaccine-escaping mutants and emphasize the need of updated strategies for CSF control.


Asunto(s)
Virus de la Fiebre Porcina Clásica/clasificación , Virus de la Fiebre Porcina Clásica/genética , Peste Porcina Clásica/virología , Genotipo , Filogenia , Secuencia de Aminoácidos , Animales , China , Peste Porcina Clásica/inmunología , Peste Porcina Clásica/prevención & control , Virus de la Fiebre Porcina Clásica/inmunología , Virus de la Fiebre Porcina Clásica/aislamiento & purificación , Variación Genética , Genoma Viral , Porcinos , Proteínas del Envoltorio Viral/genética , Vacunas Virales/inmunología , Vacunas Virales/normas
15.
J Diabetes Metab Disord ; 20(1): 131-140, 2021 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-34178825

RESUMEN

BACKGROUND: Type 2 diabetes mellitus is a serious public health problem worldwide. The aim of the study was to analyze the relationship of eight polymorphic gene variants with the development of clinical-metabolic rates of type 2 diabetes mellitus inside Kazakh population. MATERIALS AND METHODS: 139 patients with type 2 diabetes mellitus and 100 patients in the control group were examined. Genotyping of polymorphisms of candidate genes was carried out on a next generation QuantStudio 12 K Flex unit. RESULTS: Gene TCF7L2 locus rs7901695 and rs7903146, gene KCNQ1 locus rs2237892, rs7756992, and gene CDKAL1 locus rs7754840 demonstrated statistically significant associations with glucose metabolism, lipid profile and body mass index (BMI) in type 2 DM inside the population. Statistically significant difference in anthropometric and biochemical measures of rs17584499, rs4712523 and rs163184 has not been revealed. CONCLUSIONS: Genetic polymorphisms that influence pancreatic gland beta-cells insulin release and secretion associate with metabolic and anthropometric measures definitive for type 2 DM in Kazakh population.

16.
Viruses ; 12(1)2020 01 18.
Artículo en Inglés | MEDLINE | ID: mdl-31963651

RESUMEN

Human rabies post mortem diagnostic samples are often preserved in formalin. While immunohistochemistry (IHC) has been routinely used for rabies antigen detection in formalin-fixed tissue, the formalin fixation process causes nucleic acid fragmentation that may affect PCR amplification. This study reports the diagnosis of rabies in an individual from the Dominican Republic using both IHC and the LN34 pan-lyssavirus real-time RT-PCR assay on formalin-fixed brain tissue. The LN34 assay generates a 165 bp amplicon and demonstrated higher sensitivity than traditional PCR. Multiple efforts to amplify nucleic acid fragments larger than 300 bp using conventional PCR were unsuccessful, probably due to RNA fragmentation. Sequences generated from the LN34 amplicon linked the case to the rabies virus (RABV) strain circulating in the Ouest Department of Haiti to the border region between Haiti and the Dominican Republic. Direct sequencing of the LN34 amplicon allowed rapid and low-cost rabies genetic typing.


Asunto(s)
Encéfalo/patología , Encéfalo/virología , Lyssavirus/genética , Rabia/diagnóstico , Reacción en Cadena en Tiempo Real de la Polimerasa , Preescolar , República Dominicana , Resultado Fatal , Femenino , Formaldehído , Haití , Humanos , Inmunohistoquímica , Tipificación Molecular , ARN Viral/genética , Rabia/virología , Manejo de Especímenes
17.
Iran J Parasitol ; 14(1): 106-110, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31123474

RESUMEN

BACKGROUND: Wild rodents are the intermediate hosts of Toxoplasma gondii. The distribution of genetic diversity of T. gondii in wild rodents is of importance to understand the transmission of this parasite. This study aimed to genetically characterize T. gondii isolates from wild rodents in Sichuan province, southwestern China in 2013. METHODS: Genomic DNA was extracted from 10 g wild rodents' brain samples. Semi-nested PCR and multilocous PCR-RFLP technology were performed to examine genetic diversity of T. gondii isolates as described previously. RESULTS: Overall, 181 brain tissues of different wild rodents, including Eothenomys miletus (n=88), Crocidura attenuate (n=9), Rattus rattus sladeni (n=46), Mus musculus Linnaeus (n=6) and R. niviventer (n=32) were tested for T. gondii DNA, respectively. Six of them were positive for the T. gondii B1 gene by semi-nested PCR amplification, 4 showed complete genotyping results for all 11 polymorphic loci (SAG1, SAG2, alt. SAG2, SAG3, BTUB, GRA6, L358, PK1, C22-8, C29-2 and Apico) by PCR-RFLP, determined to represent a potential new genotype (http://toxodb.org/toxo/). CONCLUSION: These results documented genetic characterization of T. gondii in wild rodents from Sichuan province, and enriched the genetic diversity of T. gondii in China.

18.
Vet Microbiol ; 235: 180-187, 2019 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-31383300

RESUMEN

Pestiviruses are widespread in the world among ungulates and infect both domestic and wild animals causing severe economic losses in livestock. Bovine Viral Diarrhea Virus type 1 (BVDV-1), now re-designated as Pestivirus A, causes diseases mainly in cattle, while few data are available about infection in wild ruminants and about the role of these animals in viral maintenance and spread. In order to investigate BVDV-1 infection in domestic and wild ruminants, especially at the wildlife/livestock interface, bulk tank milk from dairy cattle and sheep and spleen from red deer, roe deer and fallow deer were analysed. Furthermore, faecal samples from Apennine chamois and from wild deer were evaluated as a suitable sample for detecting and genotyping pestiviruses. BVDV-1 RNA was found in all animal species tested but not sheep. Genotyping based on partial 5'UTR and Npro sequences detected BVDV-1a in samples from Apennine chamois, red deer, roe deer and pasture-raised cattle, while BVDV-1c was found in a faecal sample from Apennine chamois and in a spleen sample from roe deer. For the first time BVDV-1 RNA was found and genotyped from faecal samples of wild ruminants and of cattle. BVDV-1a detection in Apennine chamois, red deer, roe deer and pasture-raised cattle suggests that the eventuality of viral transmission at the wildlife/livestock interface should be carefully evaluated. BVDV subgenotype 1c was found for the first time in roe deer and Apennine chamois in Central Italy, therefore the epidemiological role of these animals and the viral ecology should be further investigated.


Asunto(s)
Animales Salvajes/virología , Heces/virología , Ganado/virología , Infecciones por Pestivirus/veterinaria , Pestivirus/genética , Rumiantes/virología , Animales , Diarrea Mucosa Bovina Viral/virología , Bovinos/virología , Ciervos/virología , Virus de la Diarrea Viral Bovina Tipo 1/genética , Virus de la Diarrea Viral Bovina/genética , Genotipo , Italia , Pestivirus/clasificación , Infecciones por Pestivirus/virología , Filogenia , Rupicapra/virología
19.
Saudi J Med Med Sci ; 6(1): 13-17, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-30787810

RESUMEN

BACKGROUND: Acinetobacter baumannii is a major cause of hospital care-acquired infections, and this bacterium poses a significant challenge to health care worldwide. At King Fahd Hospital of the University (KFHU), Al Khobar, Saudi Arabia, there had been a significant increase in the number of cases of A. baumannii infections. OBJECTIVE: The objective of this study was to determine the clonal relationship between A. baumannii collected from different specimens of patients admitted to KFHU using the enterobacterial repetitive intergenic consensus-polymerase chain reaction (ERIC-PCR) fingerprinting method. MATERIALS AND METHODS: A. baumannii strains were isolated from a total of 59 specimens from inpatients admitted to KFHU between January and September 2014. These specimens were mainly collected from wound, rectal and throat swabs and transtracheal aspiration. ERIC-PCR fingerprinting was used to determine the clonal relationship between the different isolated strains. RESULTS: Using ERIC-PCR fingerprinting genotype analysis, 51 strains of A. baumannii were clustered into seven groups, while the remaining 8 were single strains. The genetic relatedness of A. baumannii isolated from admitted patients was high, indicating cross-transmission within the hospitalized patients. CONCLUSION: This study found that the increase in the incidence of A. baumannii in patients at KFHU was likely due to the spread of seven epidemic clones, thereby highlighting the need for intensifying the infection control measures to prevent nosocomial transmission of A. baumannii. These results also demonstrate that ERIC-PCR is a reliable and rapid method for studying the clonal similarity between A. baumannii isolated from different clinical specimens.

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