RESUMEN
Fundamento: para la salud pública y el desarrollo del mundo, las enfermedades como Dengue, Zika, Chikingunya, Fiebre amarrilla y rabia son reemergentes la mayoría de ellas son infecciones que han cruzado la barrera que existe entre las especies animales y los seres humanos.Objetivo: analizar el comportamiento de los focos rábicos en la provincia La Habana.Métodos: se realizó un estudio observacional descriptivo retrospectivo de los casos de especie animal positivos a rabia, examinados en el Centro Provincial de Higiene, Epidemiología y Microbiología de La Habana, desde el 2013 hasta el 2016. Se incluyó 51 muestras de cerebros de carnívoros, quirópteros y herbívoros estudiados en la provincia. Se empleó la técnica de inmunofluorescencia directa para el diagnóstico de rabia. La descripción de la positividad se realizó a partir de los sistemas de información Excel.Resultados: el municipio Boyeros con mayor índice de positividad seguido de Arroyo Naranjo, desplaza la rabia canina de casos positivos a la rabia por mangosta.Conclusiones: el mayor reporte de casos se notificó en el municipio periférico Boyeros ubicado al sur de la provincia La Habana y limítrofe con la provincia Artemisa(AU)
Background: for the public health and world development diseases such as Dengue, Zika, Chikungunya, Yellow fever and rabies are re-emergent and most of them are infections that have crossed the barrier that exists between animal species and humans.Objective: to analyze the behavior of rabies outbreaks in Havana province, from 2013 to 2016.Methods: a retrospective descriptive, observational study of rabies-positive animal species examined at the Provincial Center for Hygiene, Epidemiology and Microbiology of Havana was conducted from 2013 to 2016. 51 samples of brains from carnivores, bats, and herbivores studied in the province were included. The direct immunofluorescence technique was used for the diagnosis of rabies. The description of the positivity was carried out using the Excel information systems.Results: the municipality of Boyeros with the highest positivity index followed by Arroyo Naranjo, displaces canine rabies cases by mongoose.Conclusions: the largest report of cases was reported in Boyeros geographically located in the south Havana province and bordering with Artemisa province(AU)
Asunto(s)
Animales , Rabia/epidemiología , Rabia/microbiología , Rabia/veterinaria , Virus de la Rabia , Epidemiología Descriptiva , Estudio Observacional , Estudios RetrospectivosRESUMEN
The concept of experimental allergic encephalomyelitis (EAE) being linked to both rabies post-vaccination encephalomyelitis and multiple sclerosis (MS) has raised the intriguing question whether animal studies carried out for the induction and transmission of transmissible spongiform encephalopathies (TSEs) using brain antigens including prions do have a similar immunopathogenetic mechanism. Although an essential link between autoimmunity and MS has been well established, its role in the pathogenesis of TSEs is generally lacking. However, auto-antibodies to myelin proteins and/or other neuronal antigens such as neurofilaments and prion proteins have been reported in animals with bovine spongiform encephalopathy (BSE) and scrapie as well as in patients with Creutzfeld-Jakob disease (CJD) and kuru. Acinetobacter has been suggested as a possible triggering microbial factor in the initiation of the autoimmune responses in these diseases because bacterial molecular sequences resemble brain antigens, especially in animals affected with BSE and patients with MS and CJD. These possibilities need to be evaluated further with longitudinal prospective studies carried out on larger numbers of animals or humans with such diseases. The transplantation of saline suspensions of brain homogenates will evoke immunological responses and therefore, the results in the study of MS and other neurological diseases have to be interpreted with caution.
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Actinobacteria/patogenicidad , Encéfalo/inmunología , Factores Inmunológicos/inmunología , Enfermedades por Prión/inmunología , Enfermedades por Prión/microbiología , Rabia/inmunología , Rabia/microbiología , Animales , Autoanticuerpos/inmunología , Humanos , Inmunidad Innata/inmunología , Modelos InmunológicosRESUMEN
The authors studied the bacterial flora of the dog oral cavity and of bite wounds, Aerobic bacteria were isolated from mouth swabs of 16 normal and 5 rabid dogs as well as from infected dog-bite wounds from 18 patients. A total of 20 different microbial species were recovered from mouth swab cultures. The most frequently isolated organisms were Klebsiella pneumoniae ssp pneumoniae, Escherichia coli, Staphylococcus aureus, Citrobacter freundii, Enterobacter cloacae, Acinetobacter calcoaceticus, and Pasteurella species. There were no differences in the aerobic bacterial flora between rabid and nonrabid dogs. From the cultures of the bite wound swabs, the authors found that almost all of the organisms identified were part of the normal oral flora of the dog. One or more aerobic bacteria were isolated from the infected dog-bite wounds. Two patients had four, 3 had three, 4 had two, and 6 had one of the nine organisms in their wounds. The predominant species of bacteria involved in infection of bite wounds were, as follows: Staphylococcus aureus, Pasteurella multocida, E. coli, Moraxella species, Pasteurella canis, and Enterobacter cloacae. However, three wound cultures had no aerobic bacterial growth. The results of this study show that the infected bite wounds may contain a mixed bacterial flora that colonize human skin and the oral cavity of dogs.
Asunto(s)
Mordeduras y Picaduras/microbiología , Perros/microbiología , Boca/microbiología , Rabia/microbiología , Animales , Humanos , TailandiaAsunto(s)
Virosis/diagnóstico , Animales , Varicela/diagnóstico , Varicela/microbiología , Infecciones por Citomegalovirus/diagnóstico , Infecciones por Citomegalovirus/microbiología , Humanos , Rabia/diagnóstico , Rabia/microbiología , Pruebas Serológicas , Enfermedades por Virus Lento/diagnóstico , Enfermedades por Virus Lento/microbiología , Cultivo de Virus , Virosis/microbiologíaRESUMEN
271 strains of rabies virus, isolated in different regions of the former USSR, were studied with the use of monoclonal antibodies P-41 (Germany). All strains isolated in the arctic regions, as well as some of the strains isolated in nonarctic regions situated 300-1700 km south of the polar circle (the Baltic countries, Central Yakutia, the eastern part of the Transbaikal region), gave positive reaction with these antibodies. Cases of hydrophobia caused by virus with the 41 (+) marker were described. Information on the spread such strains in other parts of the world is presented.
Asunto(s)
Clima Frío , Virus de la Rabia/aislamiento & purificación , Animales , Animales Domésticos , Animales Salvajes , Anticuerpos Monoclonales , Regiones Árticas/epidemiología , Técnica del Anticuerpo Fluorescente , Humanos , Rabia/epidemiología , Rabia/microbiología , Rabia/veterinaria , Virus de la Rabia/inmunología , U.R.S.S./epidemiologíaRESUMEN
Target cells of cytotoxic T lymphocytes (CTL) directed to the individual structural proteins (except for the large polymerase (L) protein) of rabies virus were established by expressing only the respective protein in murine neuroblastoma (NA) and murine macrophage (J774-1) cell lines. Mice infected with the ERA strain of rabies virus developed CTL responses to all of these rabies virus proteins. The cytotoxic activity was abrogated by pretreatment of the effector cells with anti-CD8 monoclonal antibody (MAb) and complement but not with anti-CD4 MAb. Cell lysis by CTL was blocked in the presence of anti-major histocompatibility complex (MHC) class 1 antibodies in J774-1 cell lines. Rabies virus-infected cells express these proteins at the surface, which can be recognized and lysed by the respective CTL. Mice immunized with beta-propiolactone-inactivated virus induced a CTL response against glycoprotein but not against internal viral components. This assay system might be useful for further analysis of the possible contribution of these proteins in the cell-mediated immune protection against rabies.
Asunto(s)
Virus de la Rabia/inmunología , Linfocitos T Citotóxicos/inmunología , Proteínas Estructurales Virales/inmunología , Animales , Anticuerpos Antivirales/inmunología , Línea Celular , Pruebas Inmunológicas de Citotoxicidad , Citotoxicidad Inmunológica/inmunología , Regulación Viral de la Expresión Génica , Macrófagos/virología , Masculino , Ratones , Ratones Endogámicos A , Ratones Endogámicos BALB C , Ratones Endogámicos C57BL , Neuroblastoma/virología , Rabia/inmunología , Rabia/microbiología , Virus de la Rabia/genética , Virus de la Rabia/crecimiento & desarrollo , Células Tumorales Cultivadas , Proteínas Estructurales Virales/análisisRESUMEN
Non-neural tissues, from three male and four female stripped skunks (Mephitis mephitis), 5 to 7 months old, and one male and two female red foxes (Vulpes vulpes), 12 to 16 months old, experimentally infected with street rabies virus, were examined by light microscopic immunohistochemical and electron microscopic methods. This is the first report of ultrastructural lesions in rabies-infected adrenal medulla, cornea, and nasal glands. Using the streptavidin biotin peroxidase technique, antigen was detected in mucous cells and interstitial neurons and their processes in the submandibular salivary gland, in chromaffin cells of the adrenal medulla, in epidermal cells of the skin, in external root sheath cells of hair follicles, and in corneal epithelial cells. Electron microscopically, matrix (viral nucleocapsid), virions, and anomalous viral products were common in most tissues examined, but their relative proportions varied. The results suggested that replication with minimal accumulation of matrix and anomalous viral growth products was characteristic of growth in tissues (submandibular salivary gland) that frequently produce high titers of virus, whereas replication with large amounts of matrix and anomalous structures occurred in tissues (adrenal gland and nasal gland) that generally contained low or moderate titers of virus. Novel findings included viral budding into secretory granules, increase in microfilaments in infected mucogenic cells, and continuity of viral convoluted membranous profiles with rough endoplasmic reticulum of chromaffin cells and nasal glandular cells. The presence of viral antigen and developing virus in extra-neural tissues constitutes a potential risk of non-bite exposure to people in certain groups/occupations.
Asunto(s)
Rabia/patología , Glándulas Suprarrenales/inmunología , Glándulas Suprarrenales/microbiología , Glándulas Suprarrenales/patología , Animales , Antígenos Virales/análisis , Córnea/inmunología , Córnea/microbiología , Córnea/patología , Femenino , Zorros , Masculino , Mephitidae , Microscopía Electrónica , Rabia/inmunología , Rabia/microbiología , Virus de la Rabia/aislamiento & purificación , Glándula Submandibular/inmunología , Glándula Submandibular/microbiología , Glándula Submandibular/patologíaRESUMEN
Two raccoons (Procyon lotor) were inoculated in the masseter muscles with 10(5.9) mouse intracerebral lethal dose50 (MICD50) of a rabies virus isolated from a naturally infected Iowa (USA) striped skunk (Mephitis mephitis). Five striped skunks were inoculated with either 10(0.7) or 10(2.1) MICLD50 of the same isolate. All five skunks died within 35 days following inoculation. Both raccoons survived 273 days without adverse effects, and virus was not isolated from saliva samples taken at between 25 and 273 days following inoculation.
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Mephitidae , Virus de la Rabia/patogenicidad , Rabia/veterinaria , Mapaches , Animales , Anticuerpos Antivirales/sangre , Susceptibilidad a Enfermedades , Femenino , Masculino , Rabia/inmunología , Rabia/microbiología , Virus de la Rabia/inmunología , Virus de la Rabia/aislamiento & purificación , Saliva/microbiología , Esparcimiento de VirusAsunto(s)
Rabia/microbiología , Niño , Humanos , Rabia/prevención & control , Rabia/terapia , Instituciones AcadémicasRESUMEN
The occurrence of a case of human rabies in Peninsular Malaysia is reported. Despite the various control measures taken, sporadic cases of rabies have continued to occur in Peninsular Malaysia, especially in the northern states. Clinical awareness of the occurrence of rabies is therefore important and effective post-exposure prophylaxis should be instituted as soon as possible to prevent the possible occurrence of this dreaded disease.
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Encéfalo/microbiología , Virus de la Rabia/aislamiento & purificación , Rabia/microbiología , Anticuerpos Antivirales/aislamiento & purificación , Autopsia , Encéfalo/patología , Niño , Técnica del Anticuerpo Fluorescente , Humanos , Malasia , Masculino , Rabia/diagnóstico , Rabia/patología , Virus de la Rabia/inmunologíaRESUMEN
We compared 24 rabies samples collected in Estonia in 1989 to 1992, to identify the kinds of rabies strains circulating in this country. Eleven of the strains came from the islands of Saaremaa, Hiiumaa and Muhu, off the Baltic coast; 13 came from the mainland. The mainland strains, like those from the 1988 to 1989 epizootic in Finland, were antigenically different from the 11 island isolates. The island isolates reacted negatively with monoclonal antibody W-187.5 as does the SAD B19 rabies vaccine strain, currently spread as baits to wildlife in Finland and other parts of Europe. In order to unambiguously distinguish the island isolates from the SAD B19 vaccine, we developed a polymerase chain reaction (PCR) protocol for rabies, followed by a single restriction enzyme digestion. This method enabled the island isolates to be differentiated with ease from the vaccine strain SAD B19 at the level of the nucleoprotein-coding region. Additionally, this method had the ability to distinguish other polar field isolates examined, as well as the laboratory challenge virus strain CVS, from SAD B19 vaccine. Modifications of the above PCR method may be used for epidemiological investigations of new outbreaks or of outbreaks involving different species.
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Virus de la Rabia/clasificación , Rabia/veterinaria , Animales , Secuencia de Bases , Encéfalo/microbiología , Carnívoros , Bovinos , ADN de Cadena Simple/química , ADN Viral/análisis , Perros , Estonia , Finlandia , Zorros , Datos de Secuencia Molecular , Reacción en Cadena de la Polimerasa , Rabia/microbiología , Virus de la Rabia/genética , Mapeo RestrictivoAsunto(s)
ARN Viral/química , Virus de la Rabia/química , Rabia/epidemiología , Análisis de Secuencia de ARN , Homología de Secuencia de Ácido Nucleico , Animales , Secuencia de Bases , Perros , Historia del Siglo XVIII , Historia del Siglo XIX , Historia del Siglo XX , Humanos , Datos de Secuencia Molecular , Rabia/historia , Rabia/microbiología , Vacunas Antirrábicas/química , Virus de la Rabia/aislamiento & purificaciónRESUMEN
Rabies fixed virus (CVS) was passaged 10 times in mice by intramuscular (im) route followed by experimental inoculation of the titrated virus in 4 groups of mice with the dose of 0.1 ml of 1000 mouse (LD50 0.03 ml) using intracerebral (ic), intravenous (iv), intramuscular (im), intraocular (io), and intranasal (in) routes respectively. No marked variation in clinical signs due to variation of routes could be detected. Involvement of brain with io route could be detected even in preclinical stage. Although the virus could be detected in the postclinical stage in all the tissues under study (brain, skin, salivary gland and corneal impression), with io and ic routes spread of the virus was observed in comparatively higher concentrations.
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Virus de la Rabia/aislamiento & purificación , Rabia/microbiología , Animales , Antígenos Virales/análisis , Encéfalo/microbiología , Córnea/microbiología , Ratones , Virus de la Rabia/inmunología , Glándulas Salivales/microbiología , Piel/microbiologíaRESUMEN
The effects of the inoculation of a canine strain of rabies virus in sheep were studied using ten animals which received different amounts of this virus. Two subjects, inoculated with 10(5.4) mouse intracerebral lethal doses 50% (MICLD50), died from rabies after 19 and 40 days of incubation. Clinical signs were anorexia, emaciation, nervous reactions and prostration before death. The virus was recovered from different parts of the central nervous system and salivary glands with high titres. Only three animals showed an antibody response, at very low levels.
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Enfermedades de los Perros/microbiología , Virus de la Rabia/patogenicidad , Rabia/veterinaria , Enfermedades de las Ovejas/microbiología , Animales , Anticuerpos Antivirales/sangre , Sistema Nervioso Central/microbiología , Perros , Femenino , Dosificación Letal Mediana , Masculino , Ratones , Rabia/microbiología , Virus de la Rabia/inmunología , Virus de la Rabia/aislamiento & purificación , Glándulas Salivales/microbiología , Ovinos , Organismos Libres de Patógenos EspecíficosRESUMEN
Examination of 191 specimens of Chiroptera in Osh Province of Kyrgyzstan yielded 1 strain of lyssavirus from Myotis blythi, the isolate not belonging to serotype 1. The virus was designated Aravan by the area of its isolation. Its antigenic structure was studied using antinucleocapsid monoclonal antibodies of the Wistar Institute (Philadelphia, ISA) and Central Veterinary Laboratory of Great Britain (Waybridge, Great Britain). The paper presents its antigenic profile, brief characteristics of similarity and differences of the Aravan strain and known lyssavirus serotypes.
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Antígenos Virales/análisis , Quirópteros/microbiología , Virus de la Rabia/inmunología , Animales , Antígenos Virales/aislamiento & purificación , Encéfalo/microbiología , Técnica del Anticuerpo Fluorescente , Kirguistán , Ratones , Rabia/microbiología , Virus de la Rabia/aislamiento & purificación , Virus de la Rabia/patogenicidadRESUMEN
Nucleotide sequence analysis of a 200-bp region of the nucleoprotein (N) gene of rabies virus differentiated unique genetic groups of rabies virus from samples collected in areas where dog rabies is enzootic in Asia, Africa, Europe, and the Americas. Patterns of nucleotide sequence identified for an outbreak area were conserved in samples collected over three decades. Epidemiologic relationships among isolates were determined by patterns of conserved nucleotide sequence, and the degree of sequence divergence between samples from separate outbreak areas were measured. This approach suggested that a historical reconstruction of events leading to the introduction of rabies into an area would be possible. In this broader view of rabies epidemiology, the cultural legacy of European exploration and colonization may have also included zoonotic disease.
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ADN Viral/química , ARN Viral/química , Virus de la Rabia/genética , Rabia/microbiología , Secuencia de Aminoácidos , Animales , Anticuerpos Monoclonales/inmunología , Secuencia de Bases , Cápside/química , Cápside/genética , Bovinos , Quirópteros , Análisis por Conglomerados , Brotes de Enfermedades , Enfermedades de los Perros/epidemiología , Enfermedades de los Perros/microbiología , Perros , Zorros , Herpestidae , Humanos , Datos de Secuencia Molecular , Rabia/epidemiología , Virus de la Rabia/clasificación , Virus de la Rabia/inmunología , Proteínas del Núcleo Viral/química , Proteínas del Núcleo Viral/genéticaRESUMEN
The results of intramuscular inoculation of 111 bats (Myotis daubentoni, Myotis brandtii) with three strains of Lyssaviruses--Yuli, Stade, and 1150 are presented. Bats were found to have low susceptibility, especially to strains of serotype 4. After infection with serotype 4 viruses, fewer bats died but within shorter periods than after infection with serotype 1. After inoculation with strain 1150, 60% of bats yielded virus, whereas only 9-24% did after inoculation with type 4 strains. The survival time after inoculation was 32.2 and 19.0 days, respectively. Manifestations of the disease, virus distribution in viscera, and the results of examinations of specimens from bats by express methods are described.