RESUMO
BACKGROUND: Platynosomiasis in non-human primates kept under human care causes chronic disease of the bile ducts and liver, which initially presents with nonspecific signs and can culminate in the death of the animal. Diagnosing this disease is a challenge, and an ultrasound examination can be an excellent tool when it is suspected. METHODS: This study describes the ultrasound findings from 57 marmosets with suspected infection by Platynosomum sp., the correlated hepatobiliary changes, and the anatomopathological findings that confirmed the occurrence of platynosomiasis. RESULTS: In six marmosets (one C. aurita, two C. jacchus, and three Callithrix sp.), Platynosomum infection was confirmed macroscopically (presence of adult trematodes in the gallbladder) and microscopically (adults, larvae, and eggs in histological examinations and eggs in bile and feces). These findings were compatible with the hepatobiliary changes and with images suggestive of parasitic structures in ante-mortem assessments. CONCLUSION: Ultrasound examination demonstrated its usefulness within the clinical routine for investigating this parasitosis.
Assuntos
Doenças dos Macacos , Infecções por Trematódeos , Ultrassonografia , Animais , Ultrassonografia/veterinária , Ultrassonografia/métodos , Doenças dos Macacos/diagnóstico por imagem , Doenças dos Macacos/parasitologia , Doenças dos Macacos/patologia , Doenças dos Macacos/diagnóstico , Infecções por Trematódeos/veterinária , Infecções por Trematódeos/diagnóstico por imagem , Infecções por Trematódeos/diagnóstico , Infecções por Trematódeos/parasitologia , Infecções por Trematódeos/patologia , Masculino , Feminino , Callithrix , Fígado/patologia , Fígado/diagnóstico por imagem , Fígado/parasitologiaRESUMO
Renicolid digeneans are frequently observed in the renal tubules and ureters of seabirds, such Puffinus puffinus, a migratory species distributed along the Brazilian coast. However, few studies have focused on the relationship between renicolid infection and health status in P. puffinus. Thus, the aim of this study was to describe (i) renal and systemic alterations, (ii) the renicolids and (iii) the biological aspects associated with the presence of renicolids in P. puffinus. Gross and histological assays were performed in 93 P. puffinus stranded on the Paraná coast, southern Brazil, and renicolids were submitted to morphological and molecular assays. A high prevalence of renicolids in P. puffinus (71/93) was observed. In the kidney, the main microscopic findings were lymphocytic interstitial infiltrate, ductal ectasia and tubular necrosis. The renal lesions were significantly associated with the parasite infection. The morphological (n = 84) and molecular analyses (n = 2) confirmed the species as Renicola sloanei (100% and 95.9% of nucleotide identity with R. sloanei strains from P. puffinus and from Spheniscus demersus, respectively). In both parasitized and non-parasitized animals, cardiac and skeletal muscle degeneration and necrosis were the most frequent systemic changes. Therefore, the results suggest renicolids being a possible cause for the demonstrated renal alterations. A contribution of this parasite to a decreased health status of Puffinus puffinus along their migratory route is possible.
Assuntos
Doenças das Aves/parasitologia , Aves/parasitologia , Rim/patologia , Trematódeos , Infecções por Trematódeos/veterinária , Animais , Doenças das Aves/patologia , Brasil , Rim/parasitologia , Músculo Esquelético/patologia , Miocárdio/patologia , Contagem de Ovos de Parasitas , Carga Parasitária , Filogenia , Trematódeos/anatomia & histologia , Trematódeos/classificação , Trematódeos/genética , Infecções por Trematódeos/parasitologia , Infecções por Trematódeos/patologiaRESUMO
This study described the hepatobiliary anatomopathological lesions associated with trematode Platynosomum illiciens parasitism in Neotropical primates kept in captivity. In the evaluated organs, we observed portal fibrosis, biliary epithelial hyperplasia, and inflammatory reaction with a predominance of lymphocytes and plasmocytes, and in some cases infiltration of eosinophils and neutrophils.
Assuntos
Dicrocoeliidae/fisiologia , Doenças do Sistema Digestório/veterinária , Doenças dos Macacos/patologia , Platirrinos , Infecções por Trematódeos/veterinária , Animais , Animais de Zoológico , Doenças do Sistema Digestório/parasitologia , Doenças do Sistema Digestório/patologia , Doenças dos Macacos/parasitologia , Especificidade da Espécie , Infecções por Trematódeos/parasitologia , Infecções por Trematódeos/patologiaRESUMO
In the Laboratory of Parasites of Fishes, Crustaceans and Mollusks (CEPAVE), we undertook a parasitological study on three species of fish from the Espinal and Esteros del Iberá ecoregions of Argentina. Clinostomid metacercariae were found parasitizing Characidium rachovii, Crenicichla vittata and Gymnogeophagus balzanii. In this study, we analysed the damage that these parasites inflict on their hosts through the evaluation of histological sections. In addition, Clinostomum metacercariae were identified using morphological characters and DNA barcoding. In the pathological analysis, we observed that muscle tissue was the most affected. The inflammatory response showed vascular congestion areas and infiltration of numerous inflammatory cells, mainly lymphocytes. The molecular and morphological approach supports the presence of three new lineages of clinostomid metacercariae in Argentina. This could lead to the discovery of a high number of lineages or species of Clinostomum from South America.
Assuntos
Código de Barras de DNA Taxonômico , Trematódeos/anatomia & histologia , Trematódeos/classificação , Infecções por Trematódeos/patologia , Infecções por Trematódeos/veterinária , Animais , Argentina , DNA de Helmintos/genética , DNA Espaçador Ribossômico/genética , Doenças dos Peixes/parasitologia , Inflamação/parasitologia , Metacercárias/anatomia & histologia , Metacercárias/classificação , Músculos/parasitologia , Músculos/patologia , FilogeniaRESUMO
This paper reports the first occurrence of Plesiochorus cymbiformis (Digenea: Gorgoderidae) in a loggerhead turtle ( Caretta caretta [Testudines, Cheloniidae]) in Brazil and describes the histological findings of related injuries to the urinary bladder.
Assuntos
Cistite/veterinária , Infecções por Trematódeos/veterinária , Tartarugas/parasitologia , Bexiga Urinária/patologia , Animais , Oceano Atlântico , Brasil , Cistite/parasitologia , Cistite/patologia , Feminino , Trematódeos/anatomia & histologia , Trematódeos/isolamento & purificação , Infecções por Trematódeos/patologia , Bexiga Urinária/parasitologiaRESUMO
ABSTRACT Monogenoidea pathogenic activity can elicit various histological responses in fish. Species of Ligophorus are specific parasites of mullets, and its relationship with host fish may result in a moderate pathogenic action. In order to ascertain this relationship, estuarine mullets (Mugil liza) were collected in an estuary, reared in laboratory, for three weeks, and forwarded for histological and parasitological analyses. Ligophorus uruguayense (Monogenoidea) infestation in the gills of the mullets was identified. The severe infestation by only one species of Monogenoidea may result from the specificity of these parasites to mullets. Mullets submitted to histological analysis exhibited respiratory epithelium detachment; mild, moderate and severe hyperplasia of the respiratory epithelium; atrophy; and telangiectasia of the gills. This is the first study reporting that mullets highly infested by Monogenoidea can show mild (100%) to severe (20%) gill changes with a distinct frequency of occurrence. Because of the high prevalence of mild alterations observed, it is possible to accept that L. uruguayense is moderately pathogenic to M. liza, even during high prevalence and intensity of infestation, as a result of its specificity.
Assuntos
Animais , Masculino , Feminino , Platelmintos/patogenicidade , Infecções por Trematódeos/parasitologia , Smegmamorpha/parasitologia , Brânquias/parasitologia , Infecções por Trematódeos/patologia , Brasil , Smegmamorpha/classificaçãoRESUMO
Monogenoidea pathogenic activity can elicit various histological responses in fish. Species of Ligophorus are specific parasites of mullets, and its relationship with host fish may result in a moderate pathogenic action. In order to ascertain this relationship, estuarine mullets (Mugil liza) were collected in an estuary, reared in laboratory, for three weeks, and forwarded for histological and parasitological analyses. Ligophorus uruguayense (Monogenoidea) infestation in the gills of the mullets was identified. The severe infestation by only one species of Monogenoidea may result from the specificity of these parasites to mullets. Mullets submitted to histological analysis exhibited respiratory epithelium detachment; mild, moderate and severe hyperplasia of the respiratory epithelium; atrophy; and telangiectasia of the gills. This is the first study reporting that mullets highly infested by Monogenoidea can show mild (100%) to severe (20%) gill changes with a distinct frequency of occurrence. Because of the high prevalence of mild alterations observed, it is possible to accept that L. uruguayense is moderately pathogenic to M. liza, even during high prevalence and intensity of infestation, as a result of its specificity.
Assuntos
Brânquias/parasitologia , Platelmintos/patogenicidade , Smegmamorpha/parasitologia , Infecções por Trematódeos/parasitologia , Animais , Brasil , Feminino , Masculino , Smegmamorpha/classificação , Infecções por Trematódeos/patologiaRESUMO
Spirorchiids (family Spirorchiidae Stunkard 1921) are a group of flukes that inhabit the circulatory system of turtles. Infection by members of the family Spirorchiidae involves egg deposition in the host bloodstream and accumulation in tissues, which cause inflammatory reactions and embolisms, leading or contributing to the death of the host. Reports of spirorchiid egg lesions in loggerhead turtles ( Caretta caretta Linnaeus, 1758) have only been reported from U.S. hosts. In the present report a female loggerhead sea turtle was found dead on the beach in the north part of the State of Rio de Janeiro, Brazil. During gross necropsy, no parasite egg nodule was found. But the microscopic analysis revealed a mild granulomatous inflammatory process due to eggs from the family Spirorchiidae and both Langhans giant cells and foreign-body giant cells in the heart, kidneys, intestines, lungs, and spleen. The present note is the first record of tissue lesions due to spirorchiid eggs in a loggerhead sea turtle outside the United States.
Assuntos
Trematódeos/fisiologia , Infecções por Trematódeos/veterinária , Tartarugas/parasitologia , Animais , Brasil , Feminino , Histiocitose de Células de Langerhans/parasitologia , Histiocitose de Células de Langerhans/veterinária , Óvulo , Baço/parasitologia , Trematódeos/isolamento & purificação , Infecções por Trematódeos/parasitologia , Infecções por Trematódeos/patologiaRESUMO
Platynosomiasis is a common feline hepatic disease caused by Platynosomum fastosum (Trematoda - Dicrocoelidae), which is also known as 'lizard poisoning'. Most reports of feline platynosomiasis show that this disease is sporadic and manifests with uncommon lesions; its pathogenicity is still not well understood. This study aimed to describe liver injuries and enzymatic changes associated with natural P. fastosum infection in 47 stray cats in an endemic area. Overall, 38.3% (18/47) of cats were parasitized, and 2,358 flukes (P. fastosum) were collected (131 - mean intensity of parasitism; 50.2 - mean abundance). The alanine transaminase (ALT) measure was significantly higher in parasitized animals, while alkaline phosphatase (ALP) showed no statistical difference between parasitized and non-parasitized animals. In infected animals, gross pathological lesions and microscopic liver injuries ranged from mild to severe, and were similar to those in previous descriptions of feline platynosomiasis. Nonetheless, the intensity of parasitism was not related to the severity of macroscopic or microscopic hepatic injuries. However, feline platynosomiasis should be considered in the differential diagnosis of feline liver disorders, as well as, in any program of helminth control, even if no clinical abnormalities are present.
Assuntos
Doenças do Gato/patologia , Doenças do Gato/parasitologia , Dicrocoeliidae/isolamento & purificação , Hepatopatias Parasitárias/veterinária , Infecções por Trematódeos/veterinária , Alanina Transaminase , Animais , Doenças do Gato/enzimologia , Gatos , Hepatopatias Parasitárias/enzimologia , Hepatopatias Parasitárias/parasitologia , Hepatopatias Parasitárias/patologia , Trematódeos , Infecções por Trematódeos/enzimologia , Infecções por Trematódeos/parasitologia , Infecções por Trematódeos/patologiaRESUMO
Abstract Platynosomiasis is a common feline hepatic disease caused by Platynosomum fastosum (Trematoda - Dicrocoelidae), which is also known as ‘lizard poisoning’. Most reports of feline platynosomiasis show that this disease is sporadic and manifests with uncommon lesions; its pathogenicity is still not well understood. This study aimed to describe liver injuries and enzymatic changes associated with natural P. fastosum infection in 47 stray cats in an endemic area. Overall, 38.3% (18/47) of cats were parasitized, and 2,358 flukes (P. fastosum) were collected (131 – mean intensity of parasitism; 50.2 – mean abundance). The alanine transaminase (ALT) measure was significantly higher in parasitized animals, while alkaline phosphatase (ALP) showed no statistical difference between parasitized and non-parasitized animals. In infected animals, gross pathological lesions and microscopic liver injuries ranged from mild to severe, and were similar to those in previous descriptions of feline platynosomiasis. Nonetheless, the intensity of parasitism was not related to the severity of macroscopic or microscopic hepatic injuries. However, feline platynosomiasis should be considered in the differential diagnosis of feline liver disorders, as well as, in any program of helminth control, even if no clinical abnormalities are present.
Resumo Platinossomiase é uma doença hepática felina comum causada por Platynosomum fastosum (Trematoda - Dicrocoelidae), também é conhecida como “envenenamento por lagartixa”. A maioria dos relatos de platinossomiase felina mostra que esta doença é esporádica e se manifesta com lesões incomuns; sua patogenicidade ainda não é bem compreendida. Este estudo objetivou descrever as lesões no fígado e alterações enzimáticas associadas à infecção natural por P. fastosum em 47 gatos errantes em uma área endêmica. No total, 38,3% (18/47) dos gatos estavam parasitados, e 2.358 trematódeos (P. fastosum) foram coletados (131 – intensidade média de parasitismo; 50,2 – abundância média). A quantidade de alanina transaminase (ALT) foi significativamente maior nos animais parasitados, enquanto a fosfatase alcalina (ALP) não apresentou diferença estatística entre os animais parasitados e não parasitados. Nos animais infectados, lesões patológicas macroscópicas e microscópicas hepáticas variaram de leve a grave, e foram semelhantes a descrições anteriores de platinossomiase felina. No entanto, a intensidade do parasitismo não foi relacionada à gravidade das lesões hepáticas macroscópicas ou microscópicas. Contudo, a platinossomiase felina deve ser considerada no diagnóstico diferencial de distúrbios hepáticos em felinos, assim como, em qualquer programa de controle de helmintos, mesmo que nenhuma anormalidade clínica esteja presente.
Assuntos
Animais , Gatos , Infecções por Trematódeos/veterinária , Doenças do Gato/parasitologia , Doenças do Gato/patologia , Dicrocoeliidae/isolamento & purificação , Hepatopatias Parasitárias/veterinária , Trematódeos , Infecções por Trematódeos/enzimologia , Infecções por Trematódeos/parasitologia , Infecções por Trematódeos/patologia , Doenças do Gato/enzimologia , Alanina Transaminase , Hepatopatias Parasitárias/enzimologia , Hepatopatias Parasitárias/parasitologia , Hepatopatias Parasitárias/patologiaRESUMO
Here we report a case of ulcerative caseous gastroesophagitis associated with Rameshwarotrema uterocrescens, Rao, 1975 (Digenea: Pronocephalidae), in a juvenile green turtle ( Chelonia mydas ) from southern Brazil. Similar pathologies have been reported only in adult green turtles from Costa Rica. This paper presents the second report of parasitic esophagitis due to R. uterocrescens and the first occurrence in juvenile green turtles along coastal Brazil.
Assuntos
Esofagite/veterinária , Gastrite/veterinária , Infecções por Trematódeos/veterinária , Tartarugas/parasitologia , Aminoácidos/administração & dosagem , Animais , Antibacterianos/administração & dosagem , Anti-Inflamatórios/administração & dosagem , Autopsia/veterinária , Brasil , Ceftazidima/administração & dosagem , Dexametasona/administração & dosagem , Esofagite/parasitologia , Esofagite/patologia , Esôfago/parasitologia , Esôfago/patologia , Evolução Fatal , Feminino , Hidratação/veterinária , Gastrite/parasitologia , Gastrite/patologia , Infusões Intravenosas/veterinária , Lipídeos/administração & dosagem , Trematódeos/classificação , Trematódeos/isolamento & purificação , Trematódeos/ultraestrutura , Infecções por Trematódeos/patologia , Infecções por Trematódeos/terapiaRESUMO
In vivo and in vitro antiparasitic activity of the essential oil of Lippia sidoides and blood and histological alterations were assessed in Colossoma macropomum (tambaqui). Essential oil concentrations of 10, 20, 40, 80, 160 and 320mg/L were assayed in vitro against monogenoideans Anacanthorus spathulatus, Notozothecium janauachensis and Mymarothecium boegeri from fish gills. Lippia sidoides essential oil concentrations of 320 and 160mg/L were 100% effective against monogenoideans in 10min and 1h of exposure, respectively. However, the effectiveness of 100% concentrations of 80mg/L and 40mg/L occurred in 3 and 6h, respectively. In the in vivo tests, juvenile fish were submitted to 60min of baths with 10mg/L and 15min of baths with 20mg/L of the essential oil of L. sidoides. These therapeutic baths were not efficient against Ichthyophthirius multifiliis, and monogenoideans present in the gills of C. macropomum. In addition, 10 and 20mg/L of the essential oil of L. sidoides caused an anesthetic effect on the fish and did not influence total glucose and protein plasma levels; however, it decreased the number of total erythrocytes in fish exposed to the higher concentration of this essential oil. Severe alterations and irreversible damage were observed in the fish gills just after L. sidoides essential oil baths and after 24h of recovery. The most recurrent lesions found were hyperplasia and fusion of the lamellar epithelium, vasodilation, detachment of the gill epithelium and lamellar aneurism, epithelial breakdown with hemorrhage, congestion, edema and necrosis, proliferation of the mucous cells and chloride cells and lamellar hypertrophy. Therefore, since the essential oil of L. sidoides has in vitro antiparasitic activity and low concentrations of it have shown toxic effects, the bioactive potential of its main chemical components should be investigated, as well as more efficient forms of its administration in therapeutic baths in order to eliminate fish parasites.
Assuntos
Caraciformes/parasitologia , Doenças dos Peixes/tratamento farmacológico , Lippia/química , Óleos Voláteis/farmacologia , Óleos Voláteis/uso terapêutico , Trematódeos/efeitos dos fármacos , Infecções por Trematódeos/veterinária , Animais , Anti-Helmínticos/farmacologia , Anti-Helmínticos/uso terapêutico , Anti-Helmínticos/toxicidade , Eritrócitos/efeitos dos fármacos , Doenças dos Peixes/parasitologia , Brânquias/efeitos dos fármacos , Brânquias/parasitologia , Óleos Voláteis/toxicidade , Extratos Vegetais/farmacologia , Extratos Vegetais/uso terapêutico , Extratos Vegetais/toxicidade , Infecções por Trematódeos/tratamento farmacológico , Infecções por Trematódeos/patologiaRESUMO
The aim of this study was to evaluate seric NTPDase and 5'nucleotidase activities of cattle naturally infected by Eurytrema coelomanticum, as well as to correlate them to histopathological lesions in the pancreas and the degree of parasitism. Blood samples and pancreas of 51 bovines were collected on a slaughterhouse in Southern Brazil: 33 from cattle naturally infected by E. coelomanticum (the Group A), and 18 from uninfected animals (the Group B). Infected animals showed an average of 532 parasites per pancreas. In the pancreatic histology, ducts displayed hyperplasia, stenosis, proliferation of fibrous tissue, and interstitial inflammatory infiltration of lymphocytes. The serum from infected animals showed an increase in NTPDase activity when ATP was used as substrate (P<0.001). For the ADP substrate, there was no difference between groups regarding NTPDase activity (P=0.37), as well as 5'-nucleotidase activity (P=0.27). Correlating NTPDase activity (ATP substrate) with the degree of histopathological lesions (rho=0.66, P<0.001) and the parasitic load on the pancreas (rho=0.65, P<0.001), a positive correlation was observed. Similar results were found between the degree of histopathological lesions and NTPDase activity (ADP substrate; rho=0.29, P=0.03), and 5'nucleotidase activity (rho=0.35, P=0.01). Based on the results of NTPDase and 5'nucleotidase enzymes in cattle naturally infected by E. coleomanticum, it is possible to suggest that these enzymes are involved in the modulation of inflammation, and they can act as markers of inflammatory response.
Assuntos
5'-Nucleotidase/sangue , Apirase/sangue , Doenças dos Bovinos/patologia , Dicrocoeliidae , Inflamação/veterinária , Pâncreas/parasitologia , Infecções por Trematódeos/veterinária , Matadouros , Animais , Antígenos CD , Biomarcadores/sangue , Brasil , Bovinos , Doenças dos Bovinos/enzimologia , Doenças dos Bovinos/parasitologia , Inflamação/enzimologia , Inflamação/patologia , Linfócitos , Pâncreas/patologia , Carga Parasitária , Infecções por Trematódeos/enzimologia , Infecções por Trematódeos/parasitologia , Infecções por Trematódeos/patologiaRESUMO
This paper presents the first report of parasites from the genus Renicola sp. in the kidneys of Magellanic penguins. The histological analysis revealed inflammatory infiltrate (eonsinophils, lymphocytes, and plasmocytes), together with fibroplasia and compression of the adjacent ducts.
Assuntos
Doenças das Aves/parasitologia , Nefropatias/veterinária , Rim/patologia , Spheniscidae/parasitologia , Infecções por Trematódeos/veterinária , Animais , Doenças das Aves/patologia , Rim/parasitologia , Nefropatias/parasitologia , Nefropatias/patologia , Túbulos Renais Coletores/parasitologia , Túbulos Renais Coletores/patologia , Microscopia Eletrônica de Varredura/veterinária , Trematódeos/isolamento & purificação , Trematódeos/ultraestrutura , Infecções por Trematódeos/parasitologia , Infecções por Trematódeos/patologiaRESUMO
Although Eurytrema coelomaticum is considered a parasite with low pathogenicity, it may be associated with mortality and loss of productive performance in animals due to chronic pancreatitis. The aim of this study was to evaluate the occurrence of oxidative stress caused by E. coelomaticum in naturally infected cattle, correlating the biochemical findings with the parasite load and histopathological changes. For this study, blood and pancreas samples from 51 cattle were collected, and levels of the thiobarbituric acid reactive substances (TBARS), advanced oxidation protein products (AOPP) and ferric reducing ability of plasma (FRAP) were measured in the serum and pancreas, and superoxide dismutase (SOD) activity was measured in total blood. Parasite burden was determined opening the pancreatic ducts, and then fragments of pancreas were collected and fixed in 10% buffered formalin and routinely processed for histopathology. From the 51 collected pancreas, 33 (63.5%) were parasitized. The average parasite burden per pancreas was 532 (12-2,578). TBARS and FRAP showed higher levels in serum and pancreas of infected animals (p<0.05), with a positive correlation between the histopathological changes and the number of parasites. SOD level in blood was 42% higher in parasitized group compared with control group (p<0.05), as well as AOPP in serum. Based on these results, we concluded that in natural infection by E. coelomaticum in cattle, oxidative stress occurs, characterized by the occurrence of protein oxidation, lipid peroxidation and activation of antioxidant system.
Assuntos
Doenças dos Bovinos/parasitologia , Estresse Oxidativo/fisiologia , Pâncreas/patologia , Pancreatopatias/veterinária , Trematódeos/classificação , Infecções por Trematódeos/veterinária , Animais , Sequência de Bases , Bovinos , Doenças dos Bovinos/patologia , DNA de Helmintos/genética , Pâncreas/parasitologia , Pancreatopatias/parasitologia , Pancreatopatias/patologia , Infecções por Trematódeos/parasitologia , Infecções por Trematódeos/patologiaRESUMO
The aim of this study was to provide the first report on a new host for the digenean Paratanaisia bragai in the caninde macaw Ara ararauna along with the pathological aspects of the infection in the new host. The microscopic findings revealed the presence of granulomatous interstitial nephritis. This study contributes towards knowledge of parasitism by P. bragai in A. ararauna, and emphasizes the need to use best practices in wildlife conservation parks.
Assuntos
Doenças das Aves/parasitologia , Papagaios/parasitologia , Trematódeos/isolamento & purificação , Infecções por Trematódeos/veterinária , Animais , Doenças das Aves/patologia , Infecções por Trematódeos/parasitologia , Infecções por Trematódeos/patologiaRESUMO
Abstract The aim of this study was to provide the first report on a new host for the digenean Paratanaisia bragai in the caninde macaw Ara ararauna along with the pathological aspects of the infection in the new host. The microscopic findings revealed the presence of granulomatous interstitial nephritis. This study contributes towards knowledge of parasitism by P. bragai in A. ararauna, and emphasizes the need to use best practices in wildlife conservation parks.
Resumo O objetivo deste estudo foi relatar, pela primeira vez, a arara canindéAra ararauna como um novo hospedeiro para o digenéticoParatanaisia bragai, bem como relatar aspectos patológicos relacionados à infecção no novo hospedeiro. Os achados microscópicos revelaram nefrite intersticial granulomatosa. Este estudo contribui para o conhecimento do parasitismo por P. bragai em A. ararauna e ainda faz um alerta para a adoção de boas práticas de criação em criatórios conservacionistas da fauna silvestre.
Assuntos
Animais , Papagaios/parasitologia , Trematódeos/isolamento & purificação , Infecções por Trematódeos/veterinária , Doenças das Aves/parasitologia , Infecções por Trematódeos/parasitologia , Infecções por Trematódeos/patologia , Doenças das Aves/patologiaRESUMO
The Olive Ridley turtle, Lepidochelys olivacea (Eschscholtz, 1829) (Testudines: Cheloniidae), is 1 of the 5 species of sea turtle found along the coast of Brazil. Little is known regarding infection by species of the family Spirorchiidae in the host, as only 1 report exists. This case report describes granulomas in different tissues associated to type 1 and 3 spirorchiid eggs in 5 L. olivacea from the Brazilian coast. The occurrence of the eggs was considered an incidental finding and may have contributed to the debility and death of the hosts. This is the second report of tissue lesions due to spirorchids eggs in this host and the first occurrence in Olive Ridley turtle from the Brazilian coast.
Assuntos
Infecções por Trematódeos/veterinária , Tartarugas/parasitologia , Animais , Encéfalo/parasitologia , Encéfalo/patologia , Brasil , Feminino , Granuloma/parasitologia , Granuloma/patologia , Granuloma/veterinária , Coração/parasitologia , Intestinos/parasitologia , Intestinos/patologia , Fígado/parasitologia , Fígado/patologia , Pulmão/parasitologia , Pulmão/patologia , Óvulo/classificação , Baço/parasitologia , Baço/patologia , Glândula Tireoide/parasitologia , Glândula Tireoide/patologia , Trematódeos/isolamento & purificação , Infecções por Trematódeos/patologiaRESUMO
Gross and histological lesions caused by an intestinal parasite were described in three capybaras. The parasites presented a mean length of 14 mm and width of 7 mm, were round to oval or piriform, reddish and pedunculated, and adhered strongly to the mucosa of the large intestine. The intestinal mucosa at the parasite attachment site presented loss of surface epithelium and most glands, with replacement by fibrovascular proliferation that protruded from the mucosa and was involuted by the ventral sucker of the parasite. The lamina propria presented cellular debris, eosinophils, macrophages and plasma cells. The morphological characteristics, observed using serial histological sections, made it possible to classify the parasite as a trematode (Paramphistomatidae), compatible with Taxorchis schistocotyle. One capybara also harbored many ciliated protozoa in the large intestine (at the site of attachment of the parasite) and inside the caeca of the trematodes. In conclusion, this study described a multifocal necrotizing colitis associated with T. schistocotyle parasitism in capybaras.
Assuntos
Enteropatias Parasitárias/veterinária , Intestino Grosso/patologia , Intestino Grosso/parasitologia , Paramphistomatidae , Roedores/parasitologia , Infecções por Trematódeos/veterinária , Animais , Feminino , Enteropatias Parasitárias/parasitologia , Enteropatias Parasitárias/patologia , Infecções por Trematódeos/parasitologia , Infecções por Trematódeos/patologiaRESUMO
Gross and histological lesions caused by an intestinal parasite were described in three capybaras. The parasites presented a mean length of 14 mm and width of 7 mm, were round to oval or piriform, reddish and pedunculated, and adhered strongly to the mucosa of the large intestine. The intestinal mucosa at the parasite attachment site presented loss of surface epithelium and most glands, with replacement by fibrovascular proliferation that protruded from the mucosa and was involuted by the ventral sucker of the parasite. The lamina propria presented cellular debris, eosinophils, macrophages and plasma cells. The morphological characteristics, observed using serial histological sections, made it possible to classify the parasite as a trematode (Paramphistomatidae), compatible with Taxorchis schistocotyle. One capybara also harbored many ciliated protozoa in the large intestine (at the site of attachment of the parasite) and inside the caeca of the trematodes. In conclusion, this study described a multifocal necrotizing colitis associated with T. schistocotyle parasitism in capybaras.
Lesões macroscópicas e histológicas causadas por um parasita intestinal foram descritas em três capivaras. Os parasitas apresentaram média de 14 mm de comprimento e 7 mm de largura, eram de circulares a ovais ou piriformes, avermelhados, pedunculados e estavam fortemente aderidos à mucosa do intestino grosso. A mucosa intestinal, em que os parasitas estavam aderidos, apresentou perda do epitélio e da maioria das glândulas, sendo substituídos por proliferação fibrovascular que se projetava a partir da mucosa e era envolvida pela ventosa ventral do parasita. A lâmina própria apresentou restos celulares, eosinófilos, macrófagos e plasmócitos. As características morfológicas, utilizando cortes histológicos seriados, proporcionaram a classificação do parasita como um trematoda Paramphistomatidae, compatível com Taxorchis schistocotyle. Uma capivara continha também numerosos protozoários ciliados no intestino grosso (no local de fixação do parasita) e no lúmen do ceco desses parasitos. Em síntese, este estudo demonstrou a ocorrência de colite necrótica associada ao parasitismo por T. schistocotyle em capivaras.