title: Rhinella marina (Amphibia: Bufonidae) Versus Rhabdias paraensis (Nematoda: Rhabdiasidae): Expanding the View on a Natural Infection.
abstract: Amphibian and reptile lungs are frequently infected with Rhabdias parasites, and this condition ultimately leads to reduced survival, performance, and growth because of granulomatous inflammation, nodule formation, and nematodal pneumonia onset. Here we investigate the histopathological features of naturally infected Rhinella marina by the lung nematode Rhabdias paraensis. A total of 10 host animals were captured in peridomiciliar areas in the eastern Brazilian Amazon, and anatomic-histological analyses were performed on both the infected and non-infected lungs of these amphibians. Helminths were usually found within the secondary and primary septa of infected lungs whereas parasites were not detected within vessels or adhering to tissues. In addition, we observed discrete erythrocytes, diapedesis foci, few granulocytes and erythrocytes in the interseptal spaces, discrete cell infiltration, and a small number of melanomacrophages, and no granulomas or cysts were observed. New aspects related to changes in tissue and helminth-host interactions are discussed for the relationship of R. paraensis × Rhi. marina from the Amazon region.
authors.affiliation: Laboratory of Cell Biology and Helminthology "Prof. Dra. Reinalda Marisa Lanfredi," Institute of Biological Sciences, Federal University of Pará, Belém-Pará 66075-110, Brazil.
authors.forename: Jeannie Nascimento Dos
authors.initials: JN
authors.lastname: Santos
authors.affiliation: Laboratory of Cell Biology and Helminthology "Prof. Dra. Reinalda Marisa Lanfredi," Institute of Biological Sciences, Federal University of Pará, Belém-Pará 66075-110, Brazil.
authors.forename: Djane Clarys Baia
authors.initials: DC
authors.lastname: da Silva
authors.affiliation: Laboratory of Cell Biology and Helminthology "Prof. Dra. Reinalda Marisa Lanfredi," Institute of Biological Sciences, Federal University of Pará, Belém-Pará 66075-110, Brazil.
authors.forename: Lucas Aristóteles das Neves
authors.initials: LA
authors.lastname: Feitosa
authors.affiliation: Laboratory of Cell Biology and Helminthology "Prof. Dra. Reinalda Marisa Lanfredi," Institute of Biological Sciences, Federal University of Pará, Belém-Pará 66075-110, Brazil.
authors.forename: Adriano Penha
authors.initials: AP
authors.lastname: Furtado
authors.affiliation: Laboratory of Cell Biology and Helminthology "Prof. Dra. Reinalda Marisa Lanfredi," Institute of Biological Sciences, Federal University of Pará, Belém-Pará 66075-110, Brazil.
authors.forename: Elane Guerreiro
authors.initials: EG
authors.lastname: Giese
authors.forename: Francisco Tiago
authors.initials: FT
authors.lastname: de Vasconcelos Melo
mesh_terms: D000818:Animals; D001938:Brazil; D002024:Bufo marinus / Q000033:anatomy & histology / Q000469:parasitology*; D006790:Host-Parasite Interactions; D008168:Lung / Q000033:anatomy & histology / Q000469:parasitology / Q000473:pathology; D008174:Lung Diseases, Parasitic / Q000469:parasitology / Q000473:pathology / Q000662:veterinary*; D017196:Rhabditida Infections / Q000469:parasitology / Q000473:pathology / Q000662:veterinary*; D017172:Rhabditoidea / Q000302:isolation & purification; D014132:Trachea / Q000033:anatomy & histology / Q000469:parasitology / Q000473:pathology