RESUMO
Trichostrongylosis is a rare occurrence zoonosis caused by intestinal nematodes, favored by the consumption of raw vegetables or water contaminated with infective larvae of Trichostrongylus spp. In 2015, a family outbreak of foodborne disease was registered in a rural zone of Valdivia, affecting to 51-year-old woman and her 56-year-old partner and her 12-year-old daughter. Only the adult woman, the index case, presented symptoms such as diarrhea, abdominal pain, asthenia, and nausea. The patients revealed Trichostrongylidae gen. sp. eggs in their stools, identifying Trichostrongylus colubriformis adults in two of them. They had a good response to treatment with albendazol. In Chile, 0.1 to 3.5% prevalence of infection has been reported, including a total of 93 cases recorded between the provinces of Concepción and Llanquihue.
Assuntos
Tricostrongilose , Trichostrongylus , Animais , Criança , Surtos de Doenças , Fezes , Feminino , Humanos , Pessoa de Meia-Idade , Tricostrongilose/diagnóstico , Tricostrongilose/tratamento farmacológico , Tricostrongilose/epidemiologia , ZoonosesRESUMO
Resumen La trichostrongylosis es una zoonosis de rara ocurrencia causada por nematodos intestinales, favorecida por el consumo de vegetales crudos o agua contaminada con larvas infectantes de Trichostrongylus spp. En 2015, se registró un brote familiar transmitido por alimentos en una zona rural de Valdivia, afectando a una mujer de 51 años de edad y su pareja e hija de 56 y 12 años; respectivamente. Solo la mujer adulta, el caso índice, presentó síntomas como diarrea, dolor abdominal, astenia y náuseas. Los pacientes eliminaron huevos de Trichostrongylidae gen. sp. en sus deposiciones, identificándose en dos de ellos, adultos de Trichostrongylus colubriformis. Tuvieron una buena respuesta a albendazol. En Chile, se han registrado prevalencias de infección de 0,1 a 3,5%, incluyendo un total de 93 casos diagnosticados entre las provincias de Concepción y Llanquihue.
Abstract Trichostrongylosis is a rare occurrence zoonosis caused by intestinal nematodes, favored by the consumption of raw vegetables or water contaminated with infective larvae of Trichostrongylus spp. In 2015, a family outbreak of foodborne disease was registered in a rural zone of Valdivia, affecting to 51-year-old woman and her 56-year-old partner and her 12-year-old daughter. Only the adult woman, the index case, presented symptoms such as diarrhea, abdominal pain, asthenia, and nausea. The patients revealed Trichostrongylidae gen. sp. eggs in their stools, identifying Trichostrongylus colubriformis adults in two of them. They had a good response to treatment with albendazol. In Chile, 0.1 to 3.5% prevalence of infection has been reported, including a total of 93 cases recorded between the provinces of Concepción and Llanquihue.
Assuntos
Humanos , Animais , Feminino , Criança , Pessoa de Meia-Idade , Tricostrongilose/diagnóstico , Tricostrongilose/tratamento farmacológico , Trichostrongylus , Tricostrongilose/epidemiologia , Zoonoses , Albendazol/uso terapêutico , Surtos de Doenças , Fezes/parasitologia , Doenças Transmitidas por AlimentosRESUMO
The accuracy and the precision of a simple and reliable technique for the extraction and the counting of third stage larvae densities of gastro-intestinal strongyles of ruminants from pasture samples are assessed in tropical conditions, i.e. for pangola pastures and for the genera of Haemonchus and Trichostrongylus. To separate the larvae from herbage samples, water washings obtained by a centrifuge spin-dryer were put to sediment in disposable plastic bags. The extraction and counting of larvae from sediments were achieved by exhaustion of sediments with repeated sucrose/water interface procedures. The recovery rate of third stage infective larvae (L3) added to the sediment was 79.1% (+/- 9.49%). The accuracy, estimated as recovery rate of L3 added to herbage samples, was 76.5 (+/- 11.31%). The recovery by the sedimentation method was 3.5 times higher than that of a filtering method through a 20 microns sieve. The detection limit was estimated to be 130 L3 kg-1 dry matter. Precision, estimated as the residual standard deviation of duplicate assays, was 1857 L3 kg-1 dry matter (mean 9164 L3 kg-1 dry matter). Results obtained in routine epidemiological surveys of gastro-intestinal strongylosis of small ruminants in West Africa and in the West Indies demonstrated the usefulness of the technique.
Assuntos
Sistema Digestório/parasitologia , Nematoides/isolamento & purificação , Infecções por Nematoides/veterinária , Ruminantes/parasitologia , Ração Animal , Animais , Hemoncose/diagnóstico , Hemoncose/veterinária , Haemonchus/isolamento & purificação , Larva , Infecções por Nematoides/diagnóstico , Parasitologia/métodos , Poaceae , Tricostrongilose/diagnóstico , Tricostrongilose/veterinária , Trichostrongylus/isolamento & purificação , Clima TropicalRESUMO
Se informa de los primeros casos de infestaciones humanas por Trichostrongylus sp. en la Argentina. Con el objeto de identificarlas se realizaron mediciones micrométricas referentes a tamaños de huevos, larvas rhabditoideas y larvas strongyloideas encapsuladas. Se hicieron tomas microfotográficas de preparaciones de heces de pacientes infestados y de los cultivos de larvas de esas muestras. Se muestran, el huevo característico del género Trichostrongylus, algunas anomalías, huevos en estado de mórula avanzado y con el embrión formado. Además de los caracteres relevantes de la larva rhabditoidea, su cavidad bucal, el bulbo esofágico, luz intestinal en zigzag, dilatación del extremo caudal y la larva Strongyloidea infestante. Se señalan las precauciones que debieran tomarse para no confundir los huevos de Trichostrongylus sp. con huevos grandes de Uncinarias y huevos de Heteroderidae y Tiroglyphus. En 65.000 muestras analizadas se encontraron once casos de Trichostrongylosis
Assuntos
Bovinos , Humanos , Tricostrongilose/epidemiologia , Trichostrongylus/ultraestrutura , Argentina , Diagnóstico Diferencial , Tricostrongilose/diagnósticoRESUMO
Se informa de los primeros casos de infestaciones humanas por Trichostrongylus sp. en la Argentina. Con el objeto de identificarlas se realizaron mediciones micrométricas referentes a tamaños de huevos, larvas rhabditoideas y larvas strongyloideas encapsuladas. Se hicieron tomas microfotográficas de preparaciones de heces de pacientes infestados y de los cultivos de larvas de esas muestras. Se muestran, el huevo característico del género Trichostrongylus, algunas anomalías, huevos en estado de mórula avanzado y con el embrión formado. Además de los caracteres relevantes de la larva rhabditoidea, su cavidad bucal, el bulbo esofágico, luz intestinal en zigzag, dilatación del extremo caudal y la larva Strongyloidea infestante. Se señalan las precauciones que debieran tomarse para no confundir los huevos de Trichostrongylus sp. con huevos grandes de Uncinarias y huevos de Heteroderidae y Tiroglyphus. En 65.000 muestras analizadas se encontraron once casos de Trichostrongylosis (AU)