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Headley SA, Pretto-Giordano LG, Lima SC, Suhett WG, Pereira AHT, Freitas LA, Suphoronski SA, Oliveira TES, Alfieri AF, Pereira EC, Vilas-Boas LA, Alfieri AA. Pneumonia due to Talaromyces marneffei in a Dog from Southern Brazil with Concomitant Canine Distemper Virus Infection. J Comp Pathol 2017; 157:61-66. [PMID: 28735673 DOI: 10.1016/j.jcpa.2017.06.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Revised: 05/26/2017] [Accepted: 06/02/2017] [Indexed: 02/06/2023]
Abstract
The pathological and molecular findings associated with Talaromyces marneffei-induced pneumonia with concomitant infection by canine distemper virus (CDV) are described in a dog. The principal pathological alteration occurred in the lungs. Histopathology confirmed multifocal granulomatous pneumonia associated with numerous intralesional and intracellular septate fission cells consistent with T. marneffei. A molecular assay designed to amplify a partial fragment of the 18S rRNA gene of T. marneffei provided positive results from two fungal cultures derived from the lung. Sequencing and phylogenetic analyses confirmed the results of polymerase chain reaction (PCR). Furthermore, antigens of the CDV N protein were identified within the bronchial epithelium by immunohistochemistry and a PCR assay amplified the CDV N gene from hepatic and pulmonary fragments. Collectively, the pathological and molecular techniques confirmed a diagnosis of T. marneffei-induced pneumonia with concomitant infection by CDV. These findings represent the first description of pulmonary penicilliosis in the dog and extend the geographical niche of this emerging infectious pathogen. In this case, infection by CDV may have induced immunosuppression, which facilitated the development of pulmonary penicilliosis.
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Affiliation(s)
- S A Headley
- Laboratory of Animal Pathology, Universidade Estadual de Londrina, Paraná, Brazil.
| | | | - S C Lima
- Laboratory of Genetics and Bacterial Taxonomy, Department of General Biology, Universidade Estadual de Londrina, Paraná, Brazil
| | - W G Suhett
- Small Animal Internal Medicine, Department of Veterinary Clinics, Universidade Estadual de Londrina, Paraná, Brazil
| | - A H T Pereira
- Laboratory of Animal Pathology, Universidade Estadual de Londrina, Paraná, Brazil
| | - L A Freitas
- Laboratory of Molecular Biology, Department of Veterinary Preventive Medicine, Universidade Estadual de Londrina, Paraná, Brazil
| | - S A Suphoronski
- Laboratory of Mycology, Universidade Estadual de Londrina, Paraná, Brazil
| | - T E S Oliveira
- Laboratory of Animal Pathology, Universidade Estadual de Londrina, Paraná, Brazil
| | - A F Alfieri
- Laboratory of Molecular Biology, Department of Veterinary Preventive Medicine, Universidade Estadual de Londrina, Paraná, Brazil
| | - E C Pereira
- Laboratory of Mycology, Universidade Estadual de Londrina, Paraná, Brazil
| | - L A Vilas-Boas
- Laboratory of Genetics and Bacterial Taxonomy, Department of General Biology, Universidade Estadual de Londrina, Paraná, Brazil
| | - A A Alfieri
- Multi-User Animal Health Laboratory, Molecular Biology Unit, Department of Veterinary Preventive Medicine, Universidade Estadual de Londrina, Paraná, Brazil
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Zorzetti J, Ricietto APS, Fazion FAP, Meneguim AM, Neves PMOJ, Vilas-Boas LA, Rodrigues RB, Vilas-Bôas GT. Selection and Characterization of Bacillus thuringiensis (Berliner) (Eubacteriales: Bacillaceae) Strains for Ecdytolopha aurantiana (Lima) (Lepidoptera: Tortricidae) Control. Neotrop Entomol 2017; 46:86-92. [PMID: 27406593 DOI: 10.1007/s13744-016-0424-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Accepted: 06/24/2016] [Indexed: 06/06/2023]
Abstract
The citrus fruit borer, Ecdytolopha aurantiana (Lima, 1927) (Lepidoptera: Tortricidae), is responsible for major losses to the citrus industry because it causes rot and drop of fruits. The current study aimed to select and characterize Bacillus thuringiensis (Berliner, 1911) strains toxic to E. aurantiana. For this purpose, 47 B. thuringiensis strains were evaluated in selective bioassays using first instar larvae of E. aurantiana. The lethal concentration (LC50) of the most toxic strains was estimated, and the strains were characterized by morphological, biochemical, and molecular methods. Of the 47 strains tested, 10 caused mortality above 85% and showed mean lethal concentrations between 1.05E+7 and 1.54E+8 spores mL-1. The lowest LC50 values were obtained for the HD-1 standard strain and the BR145, BR83, BR52, and BR09 strains. The protein profile showed the presence of Cry proteins of 60, 65, 70, 80, and 130 kDa. The molecular characterization showed the presence of cry1, cry2, cry3, and cry11 genes. The morphological analysis identified three different crystalline inclusions: bipyramidal, round, and cuboidal. The cry1 and cry2 genes were the most frequent among the B. thuringiensis strains evaluated and encode Cry proteins toxic to insects of the order Lepidoptera, which agree with the toxicity results obtained by the selective bioassays against E. aurantiana. The results showed four different B. thuringiensis strains toxic to E. aurantiana at the same level as the HD-1 standard strain, and these strains have biotechnological potential for E. aurantiana control through the production of transgenic plants or the formulation of biopesticides.
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Affiliation(s)
- J Zorzetti
- Centro de Ciências Agrárias, Departamento de Agronomia, Univ Estadual de Londrina, Rodovia Celso Garcia Cid, Km 445, CEP 86047-902, Londrina, PR, Brazil.
| | - A P S Ricietto
- Centro de Ciências Biológicas, Departamento de Biologia Molecular, Univ Estadual de Londrina, Rodovia Celso Garcia Cid, Km 445, CEP 86047-902, Londrina, PR, Brazil
| | - F A P Fazion
- Centro de Ciências Biológicas, Departamento de Biologia Molecular, Univ Estadual de Londrina, Rodovia Celso Garcia Cid, Km 445, CEP 86047-902, Londrina, PR, Brazil
| | - A M Meneguim
- Instituto Agronômico do Paraná, Londrina, PR, Brazil
| | - P M O J Neves
- Centro de Ciências Agrárias, Departamento de Agronomia, Univ Estadual de Londrina, Rodovia Celso Garcia Cid, Km 445, CEP 86047-902, Londrina, PR, Brazil
| | - L A Vilas-Boas
- Centro de Ciências Biológicas, Departamento de Biologia Molecular, Univ Estadual de Londrina, Rodovia Celso Garcia Cid, Km 445, CEP 86047-902, Londrina, PR, Brazil
| | - R B Rodrigues
- Instituto Agronômico do Paraná, Londrina, PR, Brazil
| | - G T Vilas-Bôas
- Centro de Ciências Biológicas, Departamento de Biologia Molecular, Univ Estadual de Londrina, Rodovia Celso Garcia Cid, Km 445, CEP 86047-902, Londrina, PR, Brazil
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Paião FG, Arisitides LGA, Murate LS, Vilas-Bôas GT, Vilas-Boas LA, Shimokomaki M. Detection of Salmonella spp, Salmonella Enteritidis and Typhimurium in naturally infected broiler chickens by a multiplex PCR-based assay. Braz J Microbiol 2013; 44:37-41. [PMID: 24159281 PMCID: PMC3804175 DOI: 10.1590/s1517-83822013005000002] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Accepted: 09/13/2012] [Indexed: 11/24/2022] Open
Abstract
The presence of Salmonella in the intestinal tract, on the chickens skin and among their feathers, may cause carcasses contamination during slaughtering and processing and possibly it is responsible by the introduction of this microorganism in the slaughterhouses. A rapid method to identify and monitor Salmonella and their sorovars in farm is becoming necessary. A pre-enriched multiplex polymerase chain reaction (m-PCR) assay employing specific primers was developed and used to detect Salmonella at the genus level and to identify the Salmonella enterica serovar Enteritidis (S. Enteritidis) and Salmonella enterica serovar Typhimurium (S. Typhimurium) in broiler chicken swab samples. The method was validated by testing DNA extract from 90 fresh culture cloacal swab samples from poultry chicken cultured in phosphate buffer peptone water at 37 °C for 18 h. The final results showed the presence of Salmonella spp. in 25% of samples, S. Enteritidis was present in 12% of the Salmonella-positive samples and S. Typhimurium in 3% of the samples. The m-PCR assay developed in this study is a specific and rapid alternative method for the identification of Salmonella spp. and allowed the observation of specific serovar contamination in the field conditions within the locations where these chickens are typically raised.
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Affiliation(s)
- F G Paião
- Universidade Estadual de Londrina, Centro de Ciências Agrárias, Departamento de Ciência e Tecnologia de Alimentos, Londrina, PR, Brazil
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