RESUMO
In many countries, urban areas are commonly contaminated with canine feces that spread parasites, a situation related to the natural and social environment. Dogs having free access to public areas therefore constitutes a health risk. Because in Patagonia there are no records of city comparisons that consider the number of free-roaming dogs and the local environmental and socioeconomic characteristics, in this study we analyse and compare canine parasitoses in two cities of Rio Negro province, Argentina. Canine feces were collected from public areas of El Bolsón and Cipolletti cities and examined using enrichment methods, Kinyoun stain and immunoassay (Copro-Elisa). The total percentage of positive feces in El Bolsón was 68.95% and 16 parasite taxa being identified, whereas in Cipolletti the total positive feces was 41.1%, with 11 taxa. Both cities presented more helminth species than protozoans. The variables that explained the occurrence of all parasites were rainfall and socioeconomic stratum with the highest values being found in low-income areas.Soil moisture is conditioned by rainfall. This study highlights the presence of the zoonotic Echinococcus sp. in dogs in urban areas of the Rio Negro province. The occurrence of this parasite in Cipolletti is unexpected, given that this city is not considered an endemic zone for this disease, which is not included in local monitoring and control plans.
Assuntos
Doenças do Cão , Equinococose , Helmintos , Parasitos , Animais , Cães , Argentina/epidemiologia , Equinococose/veterinária , Ensaio de Imunoadsorção Enzimática , Fezes/parasitologia , Doenças do Cão/epidemiologia , Doenças do Cão/parasitologiaRESUMO
The feral dog population from Tierra del Fuego (Argentina) has affected provincial sheep production, and is responsible for the decrease of 43% of the sheep stock. In addition, feral dogs preys on the native fauna, especially the guanaco (Lama guanicoe), a species protected by law. Except for some data on the aforementioned impact, very little is known about feral dogs features in this region, such as distribution, abundance, diet, reproduction, health status, among others. Therefore, a descriptive observational study was carried out in the period 2018-2021 in Tierra del Fuego, with the aim to recognize the endoparasitic fauna of these dogs, with emphasis on Echinococcus granulosus sensu lato (s.l.). Feces samples were collected from 83 feral dogs captured in 15 farms, which were evaluated using flotation and sedimentation coproparasitological techniques, and optical microscope observation. These qualitative methods showed that 66.3% of the samples were positive. Nine parasitic forms were found, including eggs of taenids, Toxocara canis and Toxascaris leonina, and Sarcocystis spp. oocysts and Giardia spp. cysts. Samples with more than one parasitic form were also observed, among which the Taenia/Sarcocystis spp. association was the most frequent. For the diagnosis of canine echinococcosis, the detection of Echinococcus spp. antigens by Copro-ELISA and the molecular confirmation by Copro-PCR were performed. The Copro-ELISA test was positive in 10/80 (12.5%) of the samples processed, while 11 samples (13.8%) were positive by Copro-PCR. Their distribution showed that 9 (81.8%) corresponded to farms with sheep farming, and 2 (18.2%) with cattle farming. The presence of E. granulosus s.l. in feral dogs from Tierra del Fuego is the most relevant finding in this study. These results confirm that feral dogs have access to viscera infected with hydatid cysts. However, the intermediate hosts involved (sheep, cattle or guanacos) should be investigated. Its impact on the transmission of cystic echinococcosis in this region should be evaluated, as well as the adequacy of the disease prevention and control actions implemented in Tierra del Fuego should be considered. Finally, the existence of a wild cycle of the disease should be evaluated, in which feral dogs would act as a source of infection for other animals and humans.
Assuntos
Camelídeos Americanos , Doenças dos Bovinos , Doenças do Cão , Equinococose , Echinococcus granulosus , Echinococcus , Doenças dos Ovinos , Animais , Bovinos , Cães , Agricultura , Antígenos de Helmintos , Argentina/epidemiologia , Doenças do Cão/epidemiologia , Equinococose/epidemiologia , Equinococose/veterinária , Oocistos , OvinosRESUMO
Introducción. El botulismo del lactante (BL) es la forma más frecuente de botulismo humano en Argentina. El objetivo es describir aspectos esenciales del diagnóstico y tratamiento de pacientes con BL internados en el servicio de terapia intensiva pediátrica (STIP). Métodos. Estudio observacional, descriptivo y retrospectivo. Se utilizó la base de datos del STIP con diagnóstico de BL en el período 2005-2020. Se registraron variables demográficas, métodos de diagnóstico, días de asistencia respiratoria mecánica convencional (ARMC), de ventilación no invasiva (VNI), estadía en STIP, mortalidad al alta hospitalaria. Resultados. Se registraron 21 pacientes con BL; 14 pacientes fueron varones, con una mediana de edad de 5 meses (RIC 2-6 m). El diagnóstico se realizó mediante técnica de bioensayo y se detectó la toxina en suero en 12 pacientes. Uno solo no requirió ARMC; 1 paciente fue traqueostomizado; 18 pacientes recibieron antibióticos; 5 recibieron VNI. Ningún paciente recibió antitoxina y no hubo fallecidos. La mediana de estadía hospitalaria fue 66 días (RI: 42-76); de internación en STIP, 48 días (RI: 29-78); y de ARMC, 37 días (RI: 26-64). La demora en la confirmación diagnóstica fue 15,8 ± 4,8 días. Conclusiones. La totalidad de los pacientes fueron diagnosticados con la técnica de bioensayo, que generó un tiempo de demora diagnóstica que excede los lapsos recomendados para la administración del tratamiento específico. Ningún paciente recibió tratamiento específico. El BL presentó baja mortalidad, pero tiempos de ARM e internación prolongados, que se asocian a infecciones sobreagregadas y uso frecuente de antibióticos.
Introduction. Infant botulism (IB) is the most common form of human botulism in Argentina. Our objective was to describe the main aspects of diagnosis and management of patients with IB admitted to the pediatric intensive care unit (PICU). Methods. Observational, descriptive, and retrospective study. The PICU database with IB diagnosis in 20052020 period was used. Demographic variables, diagnostic methods, days of conventional mechanical ventilation (CMV), non-invasive ventilation (NIV), length of stay in the PICU and mortality upon hospital discharge were recorded. Results. In total, 21 patients with IB were recorded; 14 were male, their median age was 5 months (IQR: 26 m). Diagnosis was made by bioassay, and the toxin was identified in the serum of 12 patients. Only 1 patient did not require CMV; 1 patient had a tracheostomy; 18 patients received antibiotics; 5 received NIV. No patient was administered antitoxin and no patient died. The median length of stay in the hospital was 66 days (IQR: 4276); in the PICU, 48 days (IQR: 2978); and the median use of CMV, 37 days (IQR: 2664). The delay until diagnostic confirmation was 15.8 ± 4.8 days. Conclusions. All patients were diagnosed using the bioassay technique, which resulted in a diagnostic delay that exceeds the recommended period for the administration of a specific treatment. No patient received a specific treatment. IB was related to a low mortality, but also to prolonged use of MV and length of hospital stay, which were associated with cross infections and frequent antibiotic use.
Assuntos
Humanos , Masculino , Feminino , Lactente , Botulismo/diagnóstico , Botulismo/terapia , Botulismo/epidemiologia , Infecções por Citomegalovirus , Respiração Artificial , Unidades de Terapia Intensiva Pediátrica , Estudos Retrospectivos , Diagnóstico Tardio , AntibacterianosRESUMO
Most human cystic echinococcosis (CE) cases worldwide are attributed to Echinococcus granulosus sensu stricto (s.s), followed by the G6 and G7 genotypes. While E. granulosus s.s. has a cosmopolitan distribution, the G6 genotype is restricted to areas where camels and goats are present. Goats are the primary livestock in the Neuquén province in Argentina where the G6 genotype has been reported to be responsible for a significant percentage of CE human cysts genotyped. In the present study, we genotyped 124 Echinococcus cysts infecting 90 CE-confirmed patients. Echinococcus granulosus s.s. was identified in 51 patients (56.7%) with 81 cysts and the G6 genotype in 39 patients (43.3%) harbouring 43 cysts. Most CE cases ≤18 years were male suggesting pastoral work could be a risk factor for the infection. Echinococcus granulosus s.s. was significantly found more frequently in the liver (32/51 patients) and the G6 genotype in the lungs and extrahepatic localizations (27/39). The patients infected with E. granulosus s.s., presented up to 6 cysts while patients infected with G6 presented a maximum of 2. The diameter of lung cysts attributed to E. granulosus s.s. was significantly larger compared to lung cysts from G6. Following the WHO ultrasound classification of liver cysts, we observed inactive cysts in 55.6% of G6 cysts and only 15.3% of E. granulosus s.s cysts. In conclusion, we provide evidence of differences in clinical aspects of CE caused by E. granulosus s.s. and the G6 genotype of E. granulosus s.l. complex infecting humans.
Assuntos
Cistos , Equinococose , Echinococcus granulosus , Animais , Humanos , Masculino , Feminino , Echinococcus granulosus/genética , Argentina/epidemiologia , Equinococose/epidemiologia , Equinococose/veterinária , Genótipo , Cabras , CamelusRESUMO
Introduction. Infant botulism (IB) is the most common form of human botulism in Argentina. Our objective was to describe the main aspects of diagnosis and management of patients with IB admitted to the pediatric intensive care unit (PICU). Methods. Observational, descriptive, and retrospective study. The PICU database with IB diagnosis in 2005-2020 period was used. Demographic variables, diagnostic methods, days of conventional mechanical ventilation (CMV), non-invasive ventilation (NIV), length of stay in the PICU and mortality upon hospital discharge were recorded. Results. In total, 21 patients with IB were recorded; 14 were male, their median age was 5 months (IQR: 2-6 m). Diagnosis was made by bioassay, and the toxin was identified in the serum of 12 patients. Only 1 patient did not require CMV; 1 patient had a tracheostomy; 18 patients received antibiotics; 5 received NIV. No patient was administered antitoxin and no patient died. The median length of stay in the hospital was 66 days (IQR: 42-76); in the PICU, 48 days (IQR: 29-78); and the median use of CMV, 37 days (IQR: 26-64). The delay until diagnostic confirmation was 15.8 ± 4.8 days. Conclusions. All patients were diagnosed using the bioassay technique, which resulted in a diagnostic delay that exceeds the recommended period for the administration of a specific treatment. No patient received a specific treatment. IB was related to a low mortality, but also to prolonged use o MV and length of hospital stay, which were associated with cross infections and frequent antibiotic use.
Introducción. El botulismo del lactante (BL) es la forma más frecuente de botulismo humano en Argentina. El objetivo es describir aspectos esenciales del diagnóstico y tratamiento de pacientes con BL internados en el servicio de terapia intensiva pediátrica (STIP). Métodos. Estudio observacional, descriptivo y retrospectivo. Se utilizó la base de datos del STIP con diagnóstico de BL en el período 2005-2020. Se registraron variables demográficas, métodos de diagnóstico, días de asistencia respiratoria mecánica convencional (ARMC), de ventilación no invasiva (VNI), estadía en STIP, mortalidad al alta hospitalaria. Resultados. Se registraron 21 pacientes con BL; 14 pacientes fueron varones, con una mediana de edad de 5 meses (RIC 2-6 m). El diagnóstico se realizó mediante técnica de bioensayo y se detectó la toxina en suero en 12 pacientes. Uno solo no requirió ARMC; 1 paciente fue traqueostomizado; 18 pacientes recibieron antibióticos; 5 recibieron VNI. Ningún paciente recibió antitoxina y no hubo fallecidos. La mediana de estadía hospitalaria fue 66 días (RI: 42-76); de internación en STIP, 48 días (RI: 29-78); y de ARMC, 37 días (RI: 26-64). La demora en la confirmación diagnóstica fue 15,8 ± 4,8 días. Conclusiones. La totalidad de los pacientes fueron diagnosticados con la técnica de bioensayo, que generó un tiempo de demora diagnóstica que excede los lapsos recomendados para la administración del tratamiento específico. Ningún paciente recibió tratamiento específico. El BL presentó baja mortalidad, pero tiempos de ARM e internación prolongados, que se asocian a infecciones sobreagregadas y uso frecuente de antibióticos.
Assuntos
Botulismo , Infecções por Citomegalovirus , Criança , Lactente , Humanos , Masculino , Feminino , Estudos Retrospectivos , Botulismo/diagnóstico , Botulismo/epidemiologia , Botulismo/terapia , Diagnóstico Tardio , Respiração Artificial/métodos , Unidades de Terapia Intensiva Pediátrica , AntibacterianosRESUMO
Human cystic echinococcosis caused by the larval stage of Echinococcus granulosus sensu lato (s.l.) is a highly endemic disease in the province of Neuquén, Patagonia, Argentina. Human infections with E. granulosus sensu stricto (s.s.) G1 and Echinococcus canadensis G6 were reported in Neuquén in previous studies, whereas four genotypes were identified in livestock: G1, G3, G6, and G7. The aim of this study was to identify the genotypes of E. granulosus s.l. isolates from humans of Neuquén province, Patagonia, Argentina, through the 2005-2014 period. Twenty six hydatid cysts were obtained from 21 patients. The most frequent locations were the liver and lungs. Single cysts were observed in 81.0% of patients, and combined infection of liver and lungs was detected in 9.5% of cases. Partial sequencing of mitochondrial cytochrome c oxidase subunit 1 (cox1) and NADH dehydrogenase subunit 1 (nad1) genes identified the presence of E. granulosus s.s. G1 (n = 11; 42.3%) including three different partial sequences; E. canadensis G6 (n = 14; 53.8%) and E. canadensis G7 (n = 1; 3.9%). Coinfection with G1 and G7 genotypes was detected in one patient who harbored three liver cysts. Most of the liver cysts corresponded to G1 and G6 genotypes. This study presents the first report in the Americas of a human infection with E. canadensis G7 and the second worldwide report of a coinfection with two different species and genotypes of E. granulosus s.l in humans. The molecular diversity of this parasite should be considered to redesign or improve the control program strategies in endemic regions.
Assuntos
Equinococose/parasitologia , Echinococcus granulosus/genética , Echinococcus/genética , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Animais , Argentina , Criança , Pré-Escolar , Coinfecção , Feminino , Genótipo , Humanos , Masculino , Pessoa de Meia-Idade , Mitocôndrias/genética , Estudos Prospectivos , Adulto JovemRESUMO
In Argentina, hydatid disease caused by Echinococcus granulosus is widespread. The south of Buenos Aires province, Argentina, is one of the three regions where hydatidosis is endemic. Although domestic dogs and sheep are considered to be the main hosts for E. granulosus, the potential role of wildlife in the local transmission of E. granulosus has not been investigated. The aim of this study was to estimate the hydatidosis/echinococcosis prevalence in European hare (Lepus europaeus) and Pampas fox (Lycalopex gymnocercus), two abundant species with a strong predator-prey relationship in rural areas of Buenos Aires province using different diagnostic tests. A total of 61 fox intestines were examined, finding that 52 (85.2%) harbored at least one helminth species. However, no adult or immature form of Echinococcus sp. was found in the intestinal contents. Coproparasitological analysis and Copro-ELISA followed by Copro-PCR were used as supplementary diagnostic tests. Only one (1.7%) of 59 fecal samples was positive to Taeniidae eggs by coproparasitological analysis, but this same sample was negative by the Copro-ELISA test. The analysis by Copro-ELISA showed 6 of 57 (10.6%) positive samples, but the Copro-PCR tests carried out on these samples were negative to E. granulosus. A total of 6,808 lungs, 3,576 livers, and 3,542 hearts of hunted hares were examined and palpated, but no structure resembling hydatid cysts were detected. Our results suggest that hares and Pampas foxes are not currently important wild reservoirs of E. granulosus in the studied area.
Assuntos
Equinococose/veterinária , Echinococcus/isolamento & purificação , Raposas , Lebres , Animais , Argentina/epidemiologia , Equinococose/epidemiologia , Intestinos/parasitologia , ÓvuloRESUMO
The presence of parasites was investigated by the examination of 1944 dog faecal samples collected from urban (n=646) and rural (n=1298) areas of the province of Neuquén, Patagonia, Argentina. Parasitic agents (PA) were found in 37.86% of samples. A total of 15 different PA were detected, including Toxocara canis (16.35%), Taenia spp./Echinococcus spp. (12.65%), Trichurisvulpis (6.06%), Giardia spp. (1.29%), Toxascaris leonina (0.56%), Ancylostomacaninum (0.41%), Dipylidium caninum (0.31%), Diphyllobothrium spp. (0.10%), among others. Several of these PA are recognized as zoonotic agents. Therefore, the results of this investigation revealed that local population is exposed to a broad spectrum of zoonotic parasites by means of environmental contamination with dog faeces. Prevalence of PA was slightly higher in rural (40.06%) than in urban (33.44%) locations. Distribution of groups of PA (cestodes, nematodes, and protozoa) showed statistical differences between both habitats. Prevalence of cestodes (18.18%) and protozoa (11.86%) was significantly higher in the rural environment than in urban areas and nematodes (29.10%) were more frequent in urban locations. Infection of dogs with Linguatula serrata and Cryptosporidium sp. was demonstrated for the first time in Neuquén. Rural dogs of the study area are under hydatic disease control program, which includes treatment with praziquantel every 6 weeks; thus, the finding of high level of cestode infection in these areas is of great relevance. The epidemiology of zoonotic parasitic infections in urban and rural dogs showed different patterns and, in consequence, different control measurements should be applied in each location.
Assuntos
Alveolados/isolamento & purificação , Doenças do Cão/parasitologia , Helmintíase Animal/parasitologia , Helmintos/isolamento & purificação , Enteropatias Parasitárias/veterinária , Infecções por Protozoários/parasitologia , Animais , Argentina/epidemiologia , Doenças do Cão/epidemiologia , Cães , Fezes/parasitologia , Helmintíase Animal/epidemiologia , Enteropatias Parasitárias/epidemiologia , Enteropatias Parasitárias/parasitologia , Contagem de Ovos de Parasitas/veterinária , Prevalência , Infecções por Protozoários/epidemiologia , População Rural , População Urbana , Zoonoses/epidemiologia , Zoonoses/parasitologiaRESUMO
The present study is the first comprehensive analysis of human cystic echinococcosis (CE) epidemiological data carried out in the province of Neuquén, Patagonia Argentina, after 34 years of uninterrupted control program. A retrospective study of all the official records of confirmed human CE cases between 1995 and 2004 was carried out. A total of 1107 cases were reported. The overall mean annual incidence (MAI) was 24.4 per 100,000 inhabitants for the total population and 9.7/100,000 in the 0-14 year group. Distribution of cases by age and sex as well as frequency of cyst locations was analysed. Children accounted for 13.3% of total cases, indicating active transmission of the disease. Territorial distribution of cases was highly heterogeneous: MAI per 100,000 ranged from 7.9 in the Metropolitan Sanitary Area to 78.4 in the western rural areas. Higher values were recorded in small communities as Pilo Lil (800/100,000). MAI showed a significant decrease from 1995 to 1999 (43.9-18.8) but remains stable from 2000 to 2004 (15.9-15.5). These results suggest that standard control measures, despite long-term implementation, are not able to produce a sustained improvement of the epidemiological status of the disease. Further studies about local transmission cycles, definite and intermediate hosts present, Echinococcus granulosus strains or cultural behaviours in small communities are required in order to adequate the control actions in Neuquén.
Assuntos
Equinococose/epidemiologia , Equinococose/prevenção & controle , Avaliação de Programas e Projetos de Saúde , Adolescente , Adulto , Distribuição por Idade , Idoso , Animais , Argentina/epidemiologia , Criança , Pré-Escolar , Equinococose/parasitologia , Equinococose/patologia , Feminino , Humanos , Incidência , Lactente , Recém-Nascido , Masculino , Pessoa de Meia-Idade , Prevalência , Distribuição por SexoRESUMO
Se investigó la prevalencia y distribución de parásitos intestinales (PI) en niños de 2 poblaciones de diferente nivel socioeconómico del área periurbana de la ciudad de Neuquén (Sectores I y II) a fin de evaluar su relación con las condiciones de hábitat y factores socio-económicos. Se procesaron muestras seriadas de materia fecal y de escobillado anal de 126 niños entre 2 y 14 años de edad. Se registraron datos acerca de condiciones de hábitat y factores socioeconómicos mediante visitas domiciliarias y encuestas observaciones estructuradas. Se detectó presencia de PI en el 50,7 por ciento de los niños del Sector I (barrio suburbano con adecuadas condiciones sanitarias y nivel socioeconómico medio o medio-bajo) y en el 92,9 por ciento de los niños del Sector II (asentamiento marginal con deficientes condiciones sanitarias y bajo nivel socioeconómico). Se identificaron 7 especies de protozoos intestinales y 4 especies de helmintos. Blastocystis hominis fue la especie más frecuente encontrada en ambas poblaciones. No se encontraron helmintos diferentes de Enterobius vermicularis en el Sector I y la prevalencia de tales especies fue muy baja en el Sector II. Las condiciones de hábitat deficientes y los bajos parámetros socioeconómicos se relacionaron con una mayor prevalencia de PI de transmisión directa como protozoos y E. vermicularis en las poblaciones estudiadas. Sin embargo, aún en ese contexto favorable a la transmisión, las especies parasitarias que requieren estadíos intermedios de maduración en el suelo no encuentran un hábitat adecuado para su diseminación en esta región patagónica.
The prevalence and distribution of intestinal parasites (IP) were investigated in children from two populations of different socioeconomic level, located in the same area of the city of Neuquén, in order to evaluate their relationship with habitat conditions and socioeconomic factors. Serial samples of faeces and anal scraping of 126 children between 2 and 14 years from two sectors of the suburban area of Neuquen (Sector I and Sector II) were analyzed. Data concerning habitat conditions and socioeconomic parameters were obtained by home visits and an observational structured survey. Presence of IP was detected in 50.7% of children from Sector I (suburban neighborhood with adequate sanitary conditions and middle or middle low socioeconomic level) and in 92.9% from children of Sector II (marginal settlement with poor sanitary conditions and low socioeconomic status). Seven intestinal protozoan and 4 helminth species were identified. Blastocystis hominis was the most frequent species found in both populations. No helminths different from Enterobius vermicularis were found in Sector I and the prevalence of such species was very low in Sector II. Deficient habitat conditions and low socioeconomic parameters showed relation with a higher prevalence of IP of direct transmission as protozoan and E.vermicularis in the studied populations. Nevertheless, even in this context favourable to transmission, the parasitic species which require intermediate stages of development in soil, don't find an adequate habitat for dissemination in this region