Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 1.492
Filtrar
1.
Zootaxa ; 5104(4): 506-530, 2022 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-35391023

RESUMO

Six new species of chewing lice in the Resartor-group (Brueelia-complex) are described and illustrated. They are: Aratricerca cerata n. sp. ex Zosterops capensis Sundevall, 1850; Aratricerca macki n. sp. ex Melidectes princeps Mayr Gilliard, 1951 and Ptiloprora perstriata perstriata (de Vis, 1898); Aratricerca madagascariensis n. sp. ex Randia pseudozosterops Delacour Berlioz, 1931; Turdinirmoides janigai n. sp. ex Prunella collaris nipalensis (Blyth, 1843) and P. collaris fennelli Deignan, 1964; Turdinirmoides rozsai n. sp. ex Carpodacus subhimachala (Hodgson, 1836); and Timalinirmus curvus n. sp. ex Yuhina castaniceps plumbeiceps (Godwin-Austen, 1877). A key to the species of Aratricerca, Turdinirmoides and Timalinirmus is provided.


Assuntos
Doenças das Aves , Iscnóceros , Infestações por Piolhos , Passeriformes , Ftirápteros , Animais , Infestações por Piolhos/veterinária
3.
Zootaxa ; 5091(3): 477-486, 2022 Jan 14.
Artigo em Inglês | MEDLINE | ID: mdl-35391235

RESUMO

We describe and illustrate a new species of sucking louse, Hoplopleura tunneya new species, from the Australian pale field rat, Rattus tunneyi Thomas (Rodentia: Muridae). Currently, 22 species of the genus Hoplopleura Enderlein, 1904 (Phthiraptera: Anoplura: Hoplopleuridae) are known from Australian endemic rodents. Among the seven new endemic rodent species of the genus Rattus in Australia, R. tunneyi is one of five hosts to Hoplopleura lice. In addition, we give a list of all the species of Hoplopleura known from Australian endemic rodents. Including the introduced species Polyplax spinulosa, the total number of sucking louse species known from Australian endemic rodents is now 24.


Assuntos
Anoplura , Ftirápteros , Animais , Austrália/epidemiologia , Espécies Introduzidas , Muridae , Neópteros , Ratos , Roedores
4.
Zootaxa ; 5087(3): 401-426, 2022 Jan 07.
Artigo em Inglês | MEDLINE | ID: mdl-35391281

RESUMO

Three new species of chewing lice of the Penenirmus-complex (Phthiraptera: Ischnocera) are described and illustrated from woodpeckers (Picidae) and barbets (Megalaimidae) occurring in China. They are: Picophilopterus blythipici new species from Blythipicus pyrrhotis sinensis (Rickett, 1897), Laimoloima ruiliensis new genus, new species from Psilopogon asiaticus asiaticus (Latham, 1790), and Laimoloima tandani new genus, new species from Psilopogon virens virens (Boddaert, 1783). In addition, we provide illustrations of Picophilopterus pici sensu lato ex Picus canus sordidior (Rippon, 1906), and we present evidence that justifies resurrecting the genus Picophilopterus Ansari, 1947 to include the species infesting woodpeckers and Neotropical barbets (Capitonidae). Also, we erect the new genus Laimoloima to include the species from Asian barbets (Megalaimidae). The taxonomic position of Penenirmus species from African barbets (Lybiidae) and honeyguides (Indicatoridae) is unresolved. An updated checklist of the species in the Penenirmus-complex parasitic on non-passeriform hosts is provided, including species of the genus Turnicola Clay Meinertzhagen, 1938.


Assuntos
Doenças das Aves , Iscnóceros , Infestações por Piolhos , Ftirápteros , Animais , Doenças das Aves/parasitologia , Aves , China , Infestações por Piolhos/parasitologia
5.
Front Immunol ; 13: 804987, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35401509

RESUMO

Lepeophtheirus salmonis (sea lice) and bacterial co-infection threatens wild and farmed Atlantic salmon performance and welfare. In the present study, pre-adult L. salmonis-infected and non-infected salmon were intraperitoneally injected with either formalin-killed Aeromonas salmonicida bacterin (ASAL) or phosphate-buffered saline (PBS). Dorsal skin samples from each injection/infection group (PBS/no lice, PBS/lice, ASAL/no lice, and ASAL/lice) were collected at 24 h post-injection and used for transcriptome profiling using a 44K salmonid microarray platform. Microarray results showed no clear inflammation gene expression signatures and revealed extensive gene repression effects by pre-adult lice (2,189 down and 345 up-regulated probes) in the PBS-injected salmon (PBS/lice vs. PBS/no lice), which involved basic cellular (e.g., RNA and protein metabolism) processes. Lice repressive effects were not observed within the group of ASAL-injected salmon (ASAL/lice vs. ASAL/no lice); on the contrary, the observed skin transcriptome changes -albeit of lesser magnitude (82 up and 1 down-regulated probes)- suggested the activation in key immune and wound healing processes (e.g., neutrophil degranulation, keratinocyte differentiation). The molecular skin response to ASAL was more intense in the lice-infected (ASAL/lice vs. PBS/lice; 272 up and 11 down-regulated probes) than in the non-infected fish (ASAL/no lice vs. PBS/no lice; 27 up-regulated probes). Regardless of lice infection, the skin's response to ASAL was characterized by the putative activation of both antibacterial and wound healing pathways. The transcriptomic changes prompted by ASAL+lice co-stimulation (ASAL/lice vs. PBS/no lice; 1878 up and 3120 down-regulated probes) confirmed partial mitigation of lice repressive effects on fundamental cellular processes and the activation of pathways involved in innate (e.g., neutrophil degranulation) and adaptive immunity (e.g., antibody formation), as well as endothelial cell migration. The qPCR analyses evidenced immune-relevant genes co-stimulated by ASAL and lice in an additive (e.g., mbl2b, bcl6) and synergistic (e.g., hampa, il4r) manner. These results provided insight on the physiological response of the skin of L. salmonis-infected salmon 24 h after ASAL stimulation, which revealed immunostimulatory properties by the bacterin with potential applications in anti-lice treatments for aquaculture. As a simulated co-infection model, the present study also serves as a source of candidate gene biomarkers for sea lice and bacterial co-infection.


Assuntos
Aeromonas salmonicida , Coinfecção , Copépodes , Doenças dos Peixes , Ftirápteros , Salmo salar , Aeromonas salmonicida/genética , Animais , Vacinas Bacterianas , Doenças dos Peixes/genética , Formaldeído , Ftirápteros/genética , Salmo salar/genética , Transcriptoma
6.
J Parasitol ; 108(2): 100-106, 2022 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-35240687

RESUMO

The brown booby (Sula leucogaster Boddaert, 1783) has a wide geographic distribution, being found throughout the intertropical range except for the west coast of South America. Chewing lice (Phthiraptera: Amblycera and Ischnocera) are ectoparasites commonly found in association with a wide variety of bird species, and extensive infestations can lead to severe itching and irritation that causes skin lesions, damage to the plumage, and abandonment of nests. Sula leucogaster lice have an atypical distribution, not fully following the distribution of their host. In the years 2018 and 2019, 4 marine animal rehabilitation centers located in Rio de Janeiro and São Paulo, Brazil received live birds and carcasses of Sula leucogaster. The animals were deloused and lice of 2 different species were collected. Identification was performed by optical microscopy, and the species found were Eidmanniella albescens Piaget, 1880 and Pectinopygus garbeiPessoa and Guimarães, 1935. This is the first record of both species in Rio de Janeiro.


Assuntos
Amblíceros , Doenças das Aves , Iscnóceros , Infestações por Piolhos , Ftirápteros , Animais , Doenças das Aves/epidemiologia , Doenças das Aves/parasitologia , Aves/parasitologia , Brasil/epidemiologia , Infestações por Piolhos/epidemiologia , Infestações por Piolhos/parasitologia , Infestações por Piolhos/veterinária
7.
J Parasitol ; 108(2): 107-121, 2022 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-35240688

RESUMO

Babblers (Passeriformes: Leiothrichidae, Pellorneidae, Timaliidae) are parasitized by more genera of lice of the Brueelia complex than any other group of songbirds. However, the relationships of these louse groups are poorly known. We here try to resolve the relationships between Guimaraesiella (Guimaraesiella), Guimaraesiella (Cicchinella), and their putative sister group Priceiella by using mitochondrial cytochrome c subunit 1 (COI), 12S, and 16S sequences. Our data indicate that G. (Cicchinella) forms a monophyletic group of lice from babblers, but the relationship between G. (Guimaraesiella), G. (Cicchinella), and Priceiella could not be resolved. Moreover, the position of the third lineage of babbler-specific lice, containing only the aberrant species Guimaraesiella montisodalis, is unresolved. Morphologically, this species is different from all other Guimaraesiella in several characters and may represent a distinct lineage. We present some data indicating that (1) the Nanling Mountain range may be a biogeographical barrier to chewing lice and (2) host participation in mixed-species feeding flocks may influence host associations in Brueelia-complex chewing lice.


Assuntos
Doenças das Aves , Iscnóceros , Infestações por Piolhos , Passeriformes , Ftirápteros , Animais , Doenças das Aves/epidemiologia , Iscnóceros/anatomia & histologia , Infestações por Piolhos/epidemiologia , Infestações por Piolhos/veterinária , Filogenia
8.
Vet Parasitol Reg Stud Reports ; 27: 100658, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-35012732

RESUMO

We report for the first time from Paraguay the louse-fly Lipoptena mazamae Rondani, 1878 (Diptera: Hippoboscidae), based on an individual retrieved from the body of a gray brocket Mazama gouazoubira (Fischer), found dead in the Tatí Yupí Biological Refuge, in Alto Paraná, Eastern Paraguay. Before this finding, in the decade of the 1940's, this species of fly was wrongly recorded from Paraguay, based on material collected in Bolivia, some 300 km from the border to Paraguay.


Assuntos
Cervos , Dípteros , Ftirápteros , Animais , Brasil , Paraguai/epidemiologia
9.
Rev Bras Parasitol Vet ; 31(1): e018521, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35019028

RESUMO

Ectoparasites of 18 free-living Cuban Ground Doves, Columbina passerina insularis (Columbiformes: Columbidae), captured in the National Zoological Park, Havana, Cuba, were identified. The collected ectoparasites included two species of lice (Phthiraptera: Ischnocera): Columbicola passerinae (77.1%), and Physconelloides eurysema (50%), as well as four species of feather mites (Astigmata: Falculiferidae): Pterophagus lomatus (83.3%), Byersalges talpacoti (50%), Byersalges phyllophorus (72.2%), and Hyperaspidacarus tridentatus (27.7%). Pterophagus lomatus, B. phyllophorus, and H. tridentatus represent new records for Cuba.


Assuntos
Doenças das Aves , Ftirápteros , Animais , Doenças das Aves/epidemiologia , Columbidae , Columbiformes , Cuba
11.
Vet Dermatol ; 33(3): 227-e64, 2022 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-34961979

RESUMO

BACKGROUND: Goats are important worldwide as a source of milk, meat, fibre and hide, and as show animals and pets. HYPOTHESIS/OBJECTIVES: To document the type, signalment associations and prevalence of skin disease in a referral hospital population. ANIMALS: Case population at a university veterinary teaching hospital. METHODS AND MATERIALS: Retrospective study by searching computerised medical records of goats seen between 1 January 1988 and 1 January 2021. Key words employed were "alopecia, caseous lymphadenitis, Chorioptes, dermatitis, dermatophyte, dermatophytosis, goat, lice, louse, mange, mite, pemphigus foliaceus, Psoroptes, ringworm, seborrhea, skin" RESULTS: Of 1,488 records reviewed, 358 (24%) goats had skin disease recorded. Seventy-nine (22.1%) of 358 goats presented primarily for skin disease. The Nigerian Dwarf goat breed was at higher risk of developing skin disease (P < 0.0002). As goats aged, the odds for developing skin disease was higher [odds ratio (OR) = 1.07 per year, 95% confidence interval (1.04, 1.12)] as was the predilection for malignant skin tumours (P < 0.001). Sex was not associated with skin disease (P = 0.98). The most common clinical sign was exfoliative dermatitis, noted in 94 (26.4%) of 358 goats. The most common diagnoses were pediculosis, bacterial skin disease and squamous cell carcinoma. Less frequent diagnoses were Chorioptes spp. infestation, contagious ecthyma (orf), coronitis/interdigital dermatitis, demodicosis, dermatophytosis, Psoroptes spp. infestation, dermatophilosis and pemphigus foliaceus. CONCLUSIONS AND CLINICAL IMPORTANCE: Skin diseases are common in goats. Nigerian Dwarf goats and older goats are at greater risk of developing skin disease; Nigerian Dwarf goats had a predilection for malignant skin tumours. Clinicians should include a dermatological examination in goats regardless of the reason for presentation.


Assuntos
Dermatite Esfoliativa , Doenças das Cabras , Pênfigo , Ftirápteros , Neoplasias Cutâneas , Tinha , Animais , Dermatite Esfoliativa/veterinária , Doenças das Cabras/diagnóstico , Doenças das Cabras/epidemiologia , Doenças das Cabras/patologia , Cabras , Hospitais Veterinários , Hospitais de Ensino , Humanos , Pênfigo/veterinária , Estudos Retrospectivos , Neoplasias Cutâneas/veterinária , Tinha/epidemiologia , Tinha/veterinária , Universidades
12.
Zootaxa ; 5060(3): 333-352, 2021 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-34810662

RESUMO

Four new species of Guimaraesiella Eichler, 1949 are described and illustrated based on specimens collected in South China. They are: Guimaraesiella (Cicchinella) citreisoma new species ex Leiothrix lutea kwangtungensis Whistler, 1943 (Leiothrichidae); Guimaraesiella (Cicchinella) corrugata new species ex Alcippe hueti hueti David, 1874 (Leiothrichidae); Guimaraesiella (Cicchinella) petilorica new species ex Alcippe nipalensis nipalensis (Hodgson, 1837) (Leiothrichidae); and Guimaraesiella (Cicchinella) yuhinae new species from Yuhina flavicollis rouxi (Oustalet, 1896) (Zosteropidae); this is the first species of the Brueelia-complex recorded from a member of the Zosteropidae.


Assuntos
Doenças das Aves , Iscnóceros , Infestações por Piolhos , Passeriformes , Ftirápteros , Animais , China
13.
Zootaxa ; 5069(1): 1-80, 2021 Nov 19.
Artigo em Inglês | MEDLINE | ID: mdl-34810685

RESUMO

This checklist includes taxa of chewing lice from published records, old collections, and recently collected material from birds and mammals in Slovakia. Data from established collections correspond to five different periods: (1) 19251939, collection of Karel Pfleger; (2) 19461978, collection of Frantiek Balt; (3) 19741985, collection of Vladimr Straka; (4) 19972012, collection of J Kritofk; and (5) 20082019, a collection made by the authors of this paper. A total of 255 species of feather lice67 amblyceran species in 22 genera of families Laemobothriidae, Menoponidae and Ricinidae, and 188 ischnoceran species in 54 genera of the family Philopteridaeand 366 host-louse associations are listed from 171 bird species in 21 orders. In addition, eight species of chewing lice in five genera of the family Trichodectidae are listed from eight species of mammals. Species of chewing lice are reported from about 240 different locations throughout the territory of Slovakia. Also, 43 species of lice and 20 host-louse associations for Slovakia, as well as four host-louse associations for the world, are included as new records. A host-louse list of recorded species is also given.


Assuntos
Amblíceros , Doenças das Aves , Iscnóceros , Infestações por Piolhos , Ftirápteros , Animais , Doenças das Aves/epidemiologia , Infestações por Piolhos/veterinária , Eslováquia
14.
BMC Genomics ; 22(1): 832, 2021 Nov 18.
Artigo em Inglês | MEDLINE | ID: mdl-34789144

RESUMO

BACKGROUND: The salmon louse (Lepeophtheirus salmonis) is an obligate ectoparasitic copepod living on Atlantic salmon and other salmonids in the marine environment. Salmon lice cause a number of environmental problems and lead to large economical losses in aquaculture every year. In order to develop novel parasite control strategies, a better understanding of the mechanisms of moulting and development of the salmon louse at the transcriptional level is required. METHODS: Three weighted gene co-expression networks were constructed based on the pairwise correlations of salmon louse gene expression profiles at different life stages. Network-based approaches and gene annotation information were applied to identify genes that might be important for the moulting and development of the salmon louse. RNA interference was performed for validation. Regulatory impact factors were calculated for all the transcription factor genes by examining the changes in co-expression patterns between transcription factor genes and deferentially expressed genes in middle stages and moulting stages. RESULTS: Eight gene modules were predicted as important, and 10 genes from six of the eight modules have been found to show observable phenotypes in RNA interference experiments. We knocked down five hub genes from three modules and observed phenotypic consequences in all experiments. In the infection trial, no copepodids with a RAB1A-like gene knocked down were found on fish, while control samples developed to chalimus-1 larvae. Also, a FOXO-like transcription factor obtained highest scores in the regulatory impact factor calculation. CONCLUSIONS: We propose a gene co-expression network-based approach to identify genes playing an important role in the moulting and development of salmon louse. The RNA interference experiments confirm the effectiveness of our approach and demonstrated the indispensable role of a RAB1A-like gene in the development of the salmon louse. We propose that our approach could be generalized to identify important genes associated with a phenotype of interest in other organisms.


Assuntos
Copépodes , Doenças dos Peixes , Ftirápteros , Salmo salar , Animais , Copépodes/genética , Doenças dos Peixes/genética , Muda/genética , Salmo salar/genética , Transcriptoma
15.
Infect Genet Evol ; 95: 105039, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34438095

RESUMO

Wild rodents are considered as potential carriers of several zoonotic vector-borne bacteria but their epidemiology is poorly understood in Tunisia. A total of 305 biological samples (100 spleens, 100 livers, 100 kidneys, and 5 pooled ectoparasites (Xenopsylla cheopis, Laelaps echidninus, Ornithonyssus sp., Hoplopleura sp. and eggs of the rat fleas)) were collected from 100 wild rodents from three Tunisian governorates. Molecular screening was performed to reveal infections with main vector-borne bacteria. Captured rodents belonged to three rodent genera and species including Rattus rattus (n = 51, 51%), Meriones shawi (n = 24, 24%) and Mus musculus (n = 25, 25%). Examined rodents were found to be heavily infested by the rat flea X. cheopis (n = 32, 47%) and the rat mite L. echidninus (n = 22, 32.3%). However, the rat mite Ornithonyssus sp. (n = 13, 19.1%) and the rat lice Hoplopleura sp. (n = 1, 1.5%) were rarely identified. Based on 16S rRNA and msp4 genes, infection with Anaplasmataceae bacteria was detected in six specimens of R. rattus and one M. shawi. Pathogenic A. phagocytophilum (n = 1), A. phagocytophilum-like 1 (Anaplasma sp. Japan) (n = 1), and A. ovis (n = 5) were identified. On the basis of ompB, ompA and gltA genes, infection with Rickettsia spp. was identified in three specimens of R. rattus and one of M. shawi. Five Rickettsia species of the spotted fever group, corresponding to R. monacensis, R. helvetica, R. massiliae, R. africae, and R. aeschlimannii, were detected in mixed infections. Bartonella henselae DNA was also found in two R. rattus, based on rpoB partial sequences. All revealed Anaplasma, Rickettsia and Bartonella bacteria were detected in spleen samples. Ehrlichia, Coxiella and Borrelia spp. were not identified in any of the tested samples. In Tunisia, this is the first report indicating infections with Anaplasma, Rickettsia and Bartonella spp. in wild rodents, particularly present alongside domestic livestock and human. This represents a serious risk of potential bacterial transmission. Thus, controlling rodent population in animal herds, residential areas and sensitizing local people to this risk seem absolutely necessary.


Assuntos
Zoonoses Bacterianas/epidemiologia , Gerbillinae , Camundongos , Ácaros/microbiologia , Ftirápteros/microbiologia , Ratos , Doenças dos Roedores/epidemiologia , Sifonápteros/microbiologia , Anaplasma/isolamento & purificação , Anaplasmose/epidemiologia , Anaplasmose/microbiologia , Animais , Zoonoses Bacterianas/microbiologia , Bartonella/isolamento & purificação , Infecções por Bartonella/epidemiologia , Infecções por Bartonella/microbiologia , Infecções por Bartonella/veterinária , Feminino , Gerbillinae/parasitologia , Masculino , Camundongos/parasitologia , Prevalência , Ratos/parasitologia , Rickettsia/isolamento & purificação , Infecções por Rickettsia/epidemiologia , Infecções por Rickettsia/microbiologia , Infecções por Rickettsia/veterinária , Doenças dos Roedores/microbiologia , Tunísia/epidemiologia
17.
Ann Parasitol ; 67(2): 151-159, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34331851

RESUMO

The ischnoceran louse, Felicola rohani Werneck, 1956 is reported for the first time from India on the Indian grey mongoose - Herpestes edwardsii (Geoffroy Saint-Hilaire, 1818) and the amblyceran louse, Heterodoxus spiniger (Enderlein, 1909) is recorded for the first time from that host species. The lice were collected from freshly accidentally killed specimen of the host, preserved and kept at the Museum of Estuarine Biology Regional Centre, Zoological Survey of India, Gopalpur-on-sea, Ganjam Odisha. Detailed morphological descriptions of the lice, based on light and scanning electron microscopy, are presented in this paper.


Assuntos
Amblíceros , Herpestidae , Infestações por Piolhos , Ftirápteros , Animais , Índia , Infestações por Piolhos/veterinária , Microscopia Eletrônica de Varredura
18.
Ann Parasitol ; 67(2): 161-168, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34331852

RESUMO

The domestic chickens are the most important protein sources of human populations in every part of the world; many parasites' species may affect birds. Ectoparasites can be found practically in all birds. They feed on their body components like blood, feathers. The effects of louse parasitism on birds are often severe, including retarded growth, low egg production and susceptibility to other infections and due to lice possess chewing mouthpart, it feeds on dry skin scales, scab tissues, and feather parts and it causes skin irritation and sucks blood (anemia), discomfort, loss of plumage, and decrease in productivity of the host. The aim of this study is to investigate lice genera and create the phylogenetic tree among the sequenced lice, using both mitochondrial DNA (COI gene) and nuclear gene (18S rRNA gene). Sequencing data were aligned with the sequences available in the NCBI GenBank. From October 2017 until July 2018, two hundred outdoor local chickens from three governorates (Duhok, Erbil and Sulaymaniyah), were examined for lice collection. After the morphological identification of the lice, the total genomic DNA of each louse was extracted individually and universal primers L6625, H7005 were used to amplify the DNA of mitochondrial gene COI (Cytochrome Oxidase Subunit I) and three designed specific primers (18SrRSHM1, 18SrRSHM2 and 18SrRSHM3) were applied to amplify the DNA of the nuclear gene 18S rRNA. Sequencing DNA results were submitted to the GenBank, For the first time in Iraq, twelve species of chicken lice have been submitted in a GenBank with accession numbers of MN531684 from Menopon gallinae; MN524167, MN588078, MN588079 belonged to the species of Menacanthus stramineus; MN524168, MN524182, MN588080 belonged to the species of Goniocotes gallinae; MN524180, MN588092 belonged to the species of Lipeurus caponis; MN524181, MN588091 belonged to the species of Goniocotes gigas and MN588089 belonged to the species of Goniodes dissimilis.


Assuntos
Infestações por Piolhos , Ftirápteros , Doenças das Aves Domésticas , Animais , Galinhas , Humanos , Iraque , Infestações por Piolhos/epidemiologia , Infestações por Piolhos/veterinária , Ftirápteros/genética , Filogenia , Doenças das Aves Domésticas/epidemiologia
19.
Rev Bras Parasitol Vet ; 30(2): e025520, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34076052

RESUMO

The aim of this study was to report, for the first time, the occurrence of the hippoboscid fly Ornithoctona erythrocephala on a red-legged seriema (Cariama cristata). A Diptera specimen was found among the feathers of a free-living red-legged seriema, which was referred to necropsy at the Wild Animal Pathology Service, UNESP Jaboticabal. The fly was collected, stored in absolute alcohol, and shipped to the Institute of Biosciences of the Federal University of Mato Grosso do Sul for proper identification. Based on morphological characters, the specimen was identified as a female of Ornithoctona erythrocephala. This study provides a report on a new host for O. erythrocephala.


Assuntos
Doenças das Aves , Dípteros , Ftirápteros , Animais , Animais Selvagens , Aves , Feminino
20.
Sci Rep ; 11(1): 13231, 2021 06 24.
Artigo em Inglês | MEDLINE | ID: mdl-34168167

RESUMO

Sea lice (Caligus rogercresseyi) is an ectoparasite which causes major production losses in the salmon aquaculture industry worldwide. Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss) are two of the most susceptible salmonid species to sea lice infestation. The objectives of this study were to: (1) identify genomic regions associated with resistance to Caligus rogercresseyi in Atlantic salmon and rainbow trout by performing single-step Genome-Wide Association studies (ssGWAS), and (2) identify candidate genes related to trait variation based on exploring orthologous genes within the associated regions across species. A total of 2626 Atlantic salmon and 2643 rainbow trout were challenged and genotyped with 50 K and 57 K SNP panels, respectively. We ran two independent ssGWAS for sea lice resistance on each species and identified 7 and 13 regions explaining more than 1% of the genetic variance for the trait, with the most important regions explaining 3% and 2.7% for Atlantic salmon and rainbow trout, respectively. We identified genes associated with immune response, cytoskeleton function, and cell migration when focusing on important genomic regions for each species. Moreover, we found 15 common orthogroups which were present in more than one associated genomic region, within- or between-species; however, only one orthogroup showed a clear potential biological relevance in the response against sea lice. For instance, dual-specificity protein phosphatase 10-like (dusp10) and dual-specificity protein phosphatase 8 (dusp8) were found in genomic regions associated with lice density in Atlantic salmon and rainbow trout, respectively. Dusp10 and dusp8 are modulators of the MAPK pathway and might be involved in the differences of the inflammation response between lice resistant and susceptible fish from both species. Our results provide further knowledge on candidate genes related to sea lice resistance and may help establish better control for sea lice in fish populations.


Assuntos
Oncorhynchus mykiss/genética , Oncorhynchus mykiss/parasitologia , Ftirápteros/patogenicidade , Salmão/genética , Salmão/parasitologia , Animais , Aquicultura/métodos , Suscetibilidade a Doenças/microbiologia , Doenças dos Peixes/genética , Doenças dos Peixes/parasitologia , Estudo de Associação Genômica Ampla/métodos , Genômica/métodos , Genótipo , Imunidade/genética , Infestações por Piolhos/genética , Infestações por Piolhos/microbiologia , Fenótipo , Salmo salar/genética , Salmo salar/parasitologia
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...