ABSTRACT INTRODUCTION Synanthropic rodents, which are represented by house mouse (Mus musculus), Norway rat (Rattus norvegicus) and black rat (Rattus rattus), pose a high health risk. In South America, socioeconomic fragmentation generates marked differences between urban centers and peripheral areas and are associated with a heterogeneous record. The objective was to gather data by surveying inhabitants of two neighborhoods with contrasting features in Greater La Plata, province of Buenos Aires, in order to explore, describe and evaluate the perception on the presence of rodents in domicile, peridomicile and neighborhood as vehicles of disease transmission METHODS An exploratory descriptive design was used to make and conduct surveys following the technique of stratified sampling. The variables gender and group were considered to have the same distribution in the sample. The information was transferred to a database and analyzed through IBM SPSS Statistics V25 RESULTS There is a common concern related to the role played by urban rodents as reservoirs and source of infection of zoonotic pathologies. The presence of rodents in the most vulnerable neighborhood was higher than in the center of the city DISCUSSION This study provides a different perspective related to rodents and pathologies associated, considering social perception and showing its importance for management and control programs.

RESUMEN INTRODUCCIÓN Los roedores sinantrópicos, representados por el ratón doméstico (Mus musculus), la rata parda (Rattus norvegicus) y la rata negra (Rattus rattus), representan un riesgo importante para la salud. En Sudamérica, la fragmentación socioeconómica se refleja en marcadas diferencias entre centros urbanos y áreas periféricas, y se asocia a un registro heterogéneo. El objetivo fue relevar datos por encuestas a los habitantes de dos barrios del Gran La Plata con características contrastantes para explorar, describir y evaluar la percepción en relación con la presencia de roedores en domicilio, peridomicilio y barrio como vehículos de transmisión de enfermedades MÉTODOS A partir de un diseño descriptivo exploratorio, se confeccionaron y realizaron encuestas siguiendo la técnica de muestreo estratificado. Se consideraron las variables género y grupo, de tal manera que la muestra tuviese la misma distribución. La información se transfirió a una base de datos y se analizó a través de IBM SPSS Statistics V25 RESULTADOS Existe una preocupación común respecto al rol de los roedores urbanos como reservorios y fuentes de infección de patologías zoonóticas. En el barrio más vulnerable, la presencia de roedores fue más frecuente que en el centro de la ciudad DISCUSIÓN Este estudio provee un abordaje diferente en relación con roedores y patologías asociadas, considerando la percepción social y revelando su importancia para los programas de manejo y control. ^s+

Abstract Digeneans are common parasites of small mammals. Dicrocoeliidae is a family with a cosmopolitan distribution, with 18 genera previously recorded from mammals in the Americas, six of them parasitizing rodents in Argentina. In this study, an updated compilation is provided of Dicrocoeliidae from rodents in the Americas. Also, a new Platynosomoides species is described parasitizing the cricetid rodent Akodon montensis of the Atlantic Forest in Argentina. Digital repositories were used to search for Dicrocoeliidae from rodents in the Americas. Rodents were collected in four localities of the Atlantic Forest, Argentina. Digeneans were removed from the rodent’s bile duct, and conventional studies were used for the morphological description. A total of 15 Dicrocoeliidae species were found parasitizing 18 rodent species from eight countries in the Americas. The new species of Platynosomoides from Akodon montensis differs from the other two species of genus by the size of body, testes, ovary, cecum length and position and length of the vitelline bands. Dicrocoeliidae show growing diversity, and the compilation of species in a rodent host base allows a clearer comparison and identification of new taxa in the future.