RESUMO
The recent identification in rabbits of hepatitis E viruses (HEV) related to viruses infecting humans raises the question of the role of this species as possible HEV reservoir. A serological survey on rabbit HEV infection was conducted in Italy during 2013-2014, including both farmed and pet rabbits. We found an anti-HEV antibody seroprevalence of 3.40 % in 206 farmed rabbits (collected on 7 farms) and 6.56 % in 122 pets. RNA was extracted from IgG-positive sera and analyzed by HEV-specific real-time RT-PCR. None of the samples were positive, confirming that no viremia was present in the presence of IgG. Only one serum sample from a farmed rabbit was positive for IgM, but no HEV RNA was detected in it. Pet rabbit feces were also tested for HEV RNA, with negative results. This finding suggests that HEV is circulating in rabbits in Italy.
Assuntos
Hepatite E/veterinária , Coelhos/virologia , Animais , Anticorpos Antivirais/imunologia , Western Blotting/veterinária , Ensaio de Imunoadsorção Enzimática/veterinária , Feminino , Hepatite E/epidemiologia , Vírus da Hepatite E/imunologia , Itália/epidemiologia , Masculino , Reação em Cadeia da Polimerase em Tempo Real/veterinária , Estudos SoroepidemiológicosRESUMO
Recent studies have suggested a possible correlation between obesity and adenovirus 36 (Adv36) infection in humans. As information on adenoviral DNA presence in human adipose tissue are limited, we evaluated the presence of Adv36 DNA in adipose tissue of 21 adult overweight or obese patients. Total DNA was extracted from adipose tissue biopsies. Virus detection was performed using PCR protocols with primers against specific Adv36 fiber protein and the viral oncogenic E4orf1 protein nucleotide sequences. Sequences were aligned with the NCBI database and phylogenetic analyses were carried out with MEGA6 software. Adv36 DNA was found in four samples (19%). This study indicates that some individuals carry Adv36 in the visceral adipose tissue. Further studies are needed to determine the specific effect of Adv36 infection on adipocytes, the prevalence of Adv36 infection and its relationship with obesity in the perspective of developing a vaccine that could potentially prevent or mitigate infection.
Assuntos
Adenoviridae/isolamento & purificação , Infecções por Adenovirus Humanos/epidemiologia , Adenovírus Humanos/isolamento & purificação , Gordura Intra-Abdominal/virologia , Obesidade/virologia , Adenoviridae/genética , Infecções por Adenovirus Humanos/sangue , Infecções por Adenovirus Humanos/imunologia , Adenovírus Humanos/imunologia , Adulto , Índice de Massa Corporal , DNA Viral/isolamento & purificação , Feminino , Humanos , Itália/epidemiologia , Masculino , Pessoa de Meia-Idade , Obesidade/epidemiologia , Obesidade/imunologia , FilogeniaRESUMO
Hepatitis E is an acute human disease caused by the hepatitis E virus (HEV). In addition to humans, HEV has been detected in several animal species and is recognized as a zoonotic pathogen. Pigs, wild boar and deer can be reservoir. In this study, we evaluated HEV prevalence in a free-living red deer (Cervus elaphus) population in central Italy by detecting virus-specific antibodies and RNA in sera. A total of 35 of 251 red deer sera were positive for anti-HEV IgG. HEV RNA was detected in 10 of 91 sera examined. Two genomic fragments targeted by diagnostic PCRs in the capsid region were sequenced, both matching with genotype 3 HEV. Overall results confirmed the occurrence of HEV infection in deer also in Italy.