Viral type characterization and clinical aspects of canine parvovirus in naturally infected dogs in São Paulo State, Brazil / Caracterização viral e aspectos clínicos de parvovirose em cães naturalmente infectados no Estado de São Paulo

Since the first isolation of canine parvovirus type 2 (CPV-2) in late 70's new virus types as CPV-2a and CPV-2b have been emerged and becoming prevalent in natural canine population and more recently, a third subtype was identified , CPV-2c. The main purpose of this study was to detect and characterize canine parvovirus currently present in Central-West region of São Paulo state, in Brazil. Fecal samples were collected of vaccinated and non-vaccinated dogs, clinically suspected of having CPV infection brought to the Infectious Diseases Service, Veterinary Hospital of FMVZ-UNESP. All samples (n=30) were screening for canine parvovirus through hemagglutination test and those resulting as positive (n=20) were submitted to PCR and the products were subsequently sequenced for subtype characterization. Results were tested for association with age, hematological values, viral hemagglutination titers in the feces, vaccination status and survival. Leukopenia was found in all animals, death occurred in 30% of unvaccinated dogs and in 42% of vaccinated ones. In a total of 20 positive sequenced samples, 18 were classified as CPV-2b, one as CPV-2c, and one as CPV-2a, being CPV2a and CPV2c detected in unvaccinated puppies. Compared to the reference samples amino acid change at position 426 in those circling virus was identified. The study results demonstrate the predominance of CPV-2b and the presence of CPV-2a and CPV-2c in naturally infected, vaccinated and unvaccinated dogs in in São Paulo region.(AU)

Desde o primeiro isolamento do parvovirus canino tipo 2 (CPV-2) no final dos anos 70 novos subtipos virais como CPV-2a e CPV-2b surgiram e foram se tornando prevalentes na população canina; posteriormente um terceiro subtipo foi identificado, CPV- 2-C. O principal objetivo deste estudo foi detectar e caracterizar os subtipos de parvovírus canino atualmente presente na região Centro-Oeste do Estado de São Paulo-Brasil. Amostras de fezes foram coletadas de cães vacinados e não vacinados, atendidos no Serviço de Enfermidades Infecciosas dos Animais, Hospital Veterinário da FMVZ-UNESP, com suspeita clínica parvovirose . Todas as amostras (n = 30) foram submetidas teste de hemaglutinação para parvovirus canino e as positivas (n = 20) submetidas a PCR; os produtos amplificados foram subsequentemente sequenciados para caracterização do subtipo viral. Os resultados foram associados com a idade, os valores hematológicos, os títulos de hemaglutinação viral nas fezes, estado de vacinação e sobrevivência. A leucopenia foi encontrada em todos os animais; Obito foi observado em 30% dos cães não vacinados e 42% dos vacinados. Em um total de 20 amostras positivas sequenciadas, 18 foram classificadas como CPV-2b, uma como CPV-2c, e uma como CPV-2a. CPV 2a e CPV2c foram detectados em filhotes não vacinados. Em comparação com a amostra de referência foi evidenciada uma mudança de aminoácido na posição 426 nas amostras virais circulantes. Os resultados do estudo demonstram a predominância de CPV-2b e a presença de CPV-2a e CPV-2c em cães naturalmente infectados, vacinados e não vacinados na região de São Paulo.(AU)

Presence of highly oncogenic human papillomavirus in the oral mucosa of asymptomatic men

OBJECTIVES: The aim of this study was to identify highly oncogenic forms of human papillomavirus in the oral mucosa of asymptomatic men. METHODS: In this study, we analyzed samples of exfoliated cells from the oral cavity of 559 asymptomatic men. DNA-human papillomavirus was detected using the consensus primers PGMY09/11; viral genotyping was performed using type-specific PCR and restriction fragment length polymorphism. RESULTS: DNA-human papillomavirus was detected in 1.3% of the study participants and of those 42.8% were infected by more than one type of virus. Viral types included HPV6, 11, 89 (low oncogenic risk), and HPV52, 53 (high oncogenic risk). Increased vulnerability to human papillomavirus infection was observed in individuals aged over 26 years, among those who reported oral sex practices, and in those who have had more than 16 sexual partners since first engaging in sexual intercourse. CONCLUSIONS: There was a low prevalence of human papillomavirus detection in the oral mucosa of asymptomatic men. Highly oncogenic human papillomavirus types and infection by more than one viral type was observed. Oral sex practices and a large number of sexual partners may increase the risk of acquiring human papillomavirus infection. .

Quantitative Detection of Serum HBV-DNA in Patients with Chronic Hepatic Disease and Its Clinical Application / 中国医师杂志

Objective To investigate the relationship among the content of serum HBV-DNA and the different degree of chronic liver damage,and the marks of hepatitis B virus and to explore its value in the evaluation of therapy.Method Fluorescence quantitative PCR was used to measure the concentration of sera HBV-DNA in 113 patients infected by HBV.Results The serum HBV-DNA in mild chronic hepatitis group was the highest.In the patients with aggravating liver damage,the serum HBV-DNA concentration was decreased gradually.It was indicated that serum HBV-DNA concentration in the patients with HBeAg positive was significantly higher than that of HBeAg negative.However,there were no evident relationship among HBV-DNA concentration,ALT,AST activities and different Child's classification of cirrhosis.The patients with lower serum HBV-DNA concentration before treatment had a better outcome.The therapeutical effects were correlated with the serum of viral DNA concentrations.Conclusions The quantitative detection of serum HBV-DNA has instructive value in understanding the relationship among the clinical status of chronic hepatic disease,the duplication level of hepatitis virus and evaluating therapy.