RESUMEN
Equine influenza (EI) is an important viral respiratory disease of equines caused by influenza A virus (IAV). The antigenic drift in IAVs necessitates regular updating and harmonization of vaccine strain with the circulating virus. The reverse genetics-based recombinant viruses could be easy instrument in generating vaccine against circulating virus in a quick and effective manner. Present study has been envisaged to evaluate the immunogenicity and protective efficacy of inactivated recombinant equine influenza virus (rgEIV) vaccine candidate having six segments from H1N1 virus (A/WSN/33/H1N1) and HA (hemaglutinin) and NA (neuraminidase) segments from H3N8 equine influenza virus [(A/eq/Jammu-Katra/06/08) of clade 2 of Florida sublineage] generated through reverse genetic engineering. BALB/c mice were immunized with inactivated rgEIV adjuvanted with aluminium hydroxide gel and challenged with H3N8 virus (A/eq/Jammu-Katra/06/08). The protective efficacy was evaluated through serology, cytokine profiling, clinical signs, gross and histopathological changes, immunohistochemistry and residual virus quantification. Immunizations induced robust humoral immune response as estimated through hemagglutination inhibition assay (HAI). The antibodies were isotyped and the predominant subclass was IgG1. The vaccine candidate produced mixed Th1 and Th2 responses through stimulation of IFN-γ, IL-2, IL-4 and IL-6 expression. Immunization protected mice against challenge as reflected through reduction in clinical signs and body weight loss, early recovery, mild pathological changes (gross and histopathological lesions) as evident through scoring of lesions, low residual virus in nasopharynx and lungs quantified through egg titration and quantitative reverse transcriptase PCR (qRT-PCR). The study demonstrates that inactivated recombinant EIV generated through reverse genetic approach provides equivalent protection to that observed with inactivated whole H3N8 EIV vaccine. Keywords: equine influenza; reverse genetics; vaccine; pathology; murine model.
Asunto(s)
Subtipo H1N1 del Virus de la Influenza A , Subtipo H3N8 del Virus de la Influenza A , Vacunas contra la Influenza/inmunología , Infecciones por Orthomyxoviridae , Genética Inversa , Animales , Anticuerpos Antivirales , Modelos Animales de Enfermedad , Enfermedades de los Caballos/prevención & control , Caballos , Subtipo H1N1 del Virus de la Influenza A/genética , Subtipo H3N8 del Virus de la Influenza A/genética , Vacunas contra la Influenza/genética , Ratones , Ratones Endogámicos BALB C , Infecciones por Orthomyxoviridae/inmunología , Infecciones por Orthomyxoviridae/prevención & controlRESUMEN
Rectum prolapse is a pathological condition which has long been considered as rare but whose occurrence has been progressively increasing in the past decades. There still exists a degree of uncertainty as to the disease etiopathology: moreover the exact relationship between rectum prolapse and psychic disorders which have been found in up to 50% of the patients with prolapse has not been clarified. Neither on the therapeutic level is there a common opinion as to the ideal surgical approach and over one hundred techniques have been suggested for the surgical correction of the prolapse. A study has been carried out on 10 patients suffering from psychiatric pathology of different kinds (oligophrenia, schizophrenic psychosis), hospitalized at Istituti Ospedalieri Opera Don Uva in Bisceglie. They suffered from complete rectum prolapse and underwent surgical intervention. In this study the etiopathogenetic problems of prolapse are investigated according to recent developments, with particular reference to the very peculiar implications they have in the psychiatric patient. Finally the surgical techniques correctly used and their possible application in the psychiatric patient are examined.