Hymenolepis microstoma (Cestoda: Hymenolepididae) en ratones caseros (Mus musculus) de Lima, Perú

Abstract

Un total de 12 cestodos adultos se colectaron de los conductos biliares de ratones domésticos (Mus musculus) provenientes de Lima, Perú. Diversas características del escólex y proglotis maduros del cestodo fueron observadas para la identificación morfológica. Así mismo, se realizó un diagnóstico molecular mediante un PCR y secuenciación parcial del gen mitocondrial citocromo c oxidasa subunidad 1 (cox1). Todos los cestodos fueron identificados como Hymenolepis microstoma por morfología y métodos moleculares. El aislado de H. microstoma de Perú mostró una similitud de secuencia significativa (> 99%) con los aislados de H. microstoma previamente reportados. Nuestro informe confirma la presencia del parásito en ratones de Lima.

Rodentolepis microstoma isolated from different species of Sigmodontinae rodents (Rodentia: Cricetidae) in the Cuenca del Plata, Argentina: Morphological aspects and molecular characterization

“…The morphometric characters of R. microstoma provided by different studies agree with the specimens examined in this study (e.g., scolex size, suckers, proglottids, testes, cirrus sac, eggs). The range of number of rostellar hooks was wider in the present survey at 22–31 than the ranges recorded previously of 23–29 by Casanova et al (2001) , 22–26 by Cunningham et al (2010), 24–26 by Gomez-Puerta and Valdivia-Carrera (2018) . On the other hand, some morphologically close species, such as R. srivastavai and R. akodontis , show overlapping hook number ranges (26–30 and 24, respectively) ( Rêgo, 1967 , 1970 ).…”

“…Although some features, e.g., cirrus sac, size of eggs, length and shape of hooks, may separate R. microstoma and R. srivastavai , these should be reviewed in detail, ( Rêgo, 1970 ). In addition, R. microstoma and R. akodontis show a similar morphology of scolex, length and shape of hooks, number of rostellar hooks, size of suckers, size of cirrus sac and eggs (e.g., Rêgo, 1967 ; Casanova et al, 2001 ; Cunningham and Olson, 2010 ; Gomez-Puerta and Valdivia-Carrera, 2018 ).…”

“…Mature tapeworms occur in the small intestine; however, R. microstoma was recorded on several occasions in the bile duct of the mammalian host (e.g., Cunningham and Olson, 2010 ; Gomez-Puerta and Valdivia-Carrera, 2018 ). Litchford (1963) showed that this species can also parasitize the mouse, hamster, and rat duodenum.…”

“…Around six hymenolepidid genera from rodents have been reported in North and South America (e.g., Arostrilepis Mas-Coma and Tenora, 1997, Hobergia Gardner, Dursahinhan, Campbell and Rácz, 2020, Hymenandrya Smith, 1954, Hymenolepis Weinland, 1858, Monogynolepis Czaplinski and Vaucher, 1994, Rodentolepis Spasskii, 1954), of which 17 species of the genus Rodentolepis have been reported parasitizing Cricetidae, two from South America, and only one from Argentina ( Barker, 1915 ; Rider and Macy, 1947 ; Neiland and Senger, 1952 ; Schiller, 1952 ; Wardle and McLeod, 1952 ; Rêgo, 1967 , 1970 ; Sutton, 1974 ; Cunningham and Olson, 2010 ; Guerreiro Martins et al, 2014 ; Panisse et al, 2017 ). The species with the widest geographic and host range are R. nana and R. microstoma , parasitizing several genera of Muridae and Cricetidae, such as Apodemus , Arvicanthis , Mastomys , Mesocricetus , Microtus , Mus , Rattus , and Sigmodon (e.g., Litchford, 1963 ; Cunningham and Olson, 2010 ; Gomez-Puerta and Valdivia-Carrera, 2018 ). Rodentolepis akodontis Rêgo (1967) and R. srivastavai Rêgo (1970) have also been recorded for different sigmodontine rodents (Cricetidae) in Brazil: Akodon cursor (Winge, 1887), Akodon montensis Thomas, 1913 and Necromys lasiurus (Lund, 1840) (e.g., Rêgo, 1967 ; Simões et al, 2011 ; Costa et al, 2019 ).…”

The mouse bile duct tapeworm, Hymenolepis microstoma in free-living small mammals in Slovakia: occurrence and genetic analysis

“…To our knowledge, these are also the first documented reports H. microstoma in Central Europe, considering that no data about its occurrence are available in the literature including records deposited in the Host-Parasite database of the Natural History Museum (Gibson et al, 2005). As the parasite was not included in the checklist ´Synopsis of Cestodes in Slovakia´, encompassing records from a number of local and broader surveys in Slovakia during 1955-1996(Hanzelová & Ryšavý, 1996, it is likely that the mouse bile duct tapeworm was introduced into the Slovak territory over the last two decades.…”