RESUMEN
The aim of the study was to evaluate the performance of the new mariPOC(®) method against the direct fluorescent antibody assay (DFA) as the primary reference method for rapid virus detection from nasopharyngeal aspirates and swab samples. The study was an open prospective evaluation during the seasonal winter epidemics in the Mikkeli Central Hospital, Finland. Altogether, 283 samples were analyzed; 124 (43.8%) were from young children (<5 years old). Discrepant samples were resolved by PCR. With nasopharyngeal aspirate samples, the sensitivity and clinical specificity of the mariPOC(®) assay for influenza A virus and respiratory syncytial virus, were 85.7% (CI 69.7-95.2) and 90% (CI 52.0-80.5), and 100% and 99.5%, respectively. The mariPOC(®) performed less well with swab samples having sensitivities at 77.3% (CI 54.6-92.2) and 67.4% (CI 52-80.5), respectively. The specificities were as for nasopharyngeal aspirates. Importantly, similar performance was observed regardless of the cohort age group. In conclusion, the mariPOC(®) test system has a high potential and utility in duty units because it is fast, simple, and multianalyte. The importance of personnel training for proper sample collection should be emphasized.
Asunto(s)
Técnicas de Laboratorio Clínico/métodos , Virus de la Influenza A/aislamiento & purificación , Gripe Humana/diagnóstico , Sistemas de Atención de Punto , Infecciones por Virus Sincitial Respiratorio/diagnóstico , Virus Sincitiales Respiratorios/aislamiento & purificación , Virología/métodos , Preescolar , Finlandia , Humanos , Gripe Humana/virología , Nasofaringe/virología , Estudios Prospectivos , Infecciones por Virus Sincitial Respiratorio/virología , Sensibilidad y EspecificidadRESUMEN
Streptococcus equi subspecies zooepidemicus (S. zooepidemicus) is a zoonotic pathogen for persons in contact with horses. In horses, S. zooepidemicus is an opportunistic pathogen, but human infections associated with S. zooepidemicus are often severe. Within 6 months in 2011, 3 unrelated cases of severe, disseminated S. zooepidemicus infection occurred in men working with horses in eastern Finland. To clarify the pathogen's epidemiology, we describe the clinical features of the infection in 3 patients and compare the S. zooepidemicus isolates from the human cases with S. zooepidemicus isolates from horses. The isolates were analyzed by using pulsed-field gel electrophoresis, multilocus sequence typing, and sequencing of the szP gene. Molecular typing methods showed that human and equine isolates were identical or closely related. These results emphasize that S. zooepidemicus transmitted from horses can lead to severe infections in humans. As leisure and professional equine sports continue to grow, this infection should be recognized as an emerging zoonosis.
Asunto(s)
Enfermedades de los Caballos/diagnóstico , Infecciones Estreptocócicas/veterinaria , Streptococcus equi/genética , Crianza de Animales Domésticos , Animales , Genes Bacterianos , Enfermedades de los Caballos/microbiología , Enfermedades de los Caballos/transmisión , Caballos , Humanos , Masculino , Persona de Mediana Edad , Técnicas de Diagnóstico Molecular , Tipificación de Secuencias Multilocus , Infecciones Estreptocócicas/diagnóstico , Infecciones Estreptocócicas/microbiología , Infecciones Estreptocócicas/transmisión , Streptococcus equi/aislamiento & purificación , ZoonosisRESUMEN
BACKGROUND: In 1872, in British Medical Journal (BMJ) Dr. David Ferrier published that Sarcina ventriculi (Goodsir) constantly occurred in the blood of man and the lower animals. His observation was based on bleeding experiments, incubation of blood at 100°F (37.8°C) and later examination. He found "immense numbers of beautifully formed sarcinæ". In the next issue of BMJ Dr. Charlton Bastian expressed concerns that Sarcina might indeed be "really a living thing" or "might be partly organic and partly mineral in its constitutions". CASE PRESENTATION: Anaerobic gram-positive giant coccae assembled in tetrads were recovered from one anaerobic blood culture bottle of a 48-year-old female who in her early childhood was diagnosed with congenital chloride diarrhoea. This is a rare recessively inherited disease that belongs to the Finnish disease heritage. The bacteria were identified with the 16S rRNA gene sequencing. CONCLUSIONS: Here, after more than a century we present the first report that Sarcina ventriculi can indeed cause bacteremia in a susceptible person.