RESUMO

The oligochaete Dero lutzi follows a life strategy that alternates between free-living periods in aquatic environments and endoparasitic phases. Most occurrences of D. lutzi in anurans are reported in species with arboreal habits, with studies limited to the recording of the oligochaete's presence in the host. Our study recovered specimens of D. lutzi from the tree frogs Scinax fuscovarius and Scinax. nasicus. We performed a morphological assessment of the parasite using light microscopy, for the first time, scanning electron microscopy. Molecular characterization of D. lutzi was carried out using the mitochondrial gene 16S rRNA and the nuclear gene 28S rRNA. Additionally, a phylogenetic tree was constructed to assess the species´position in relation to other group members. In our results, we confirmed the phenotypic morphological characteristics of the endoparasitic phase of D. lutzi. We also presented its phylogenetic position with other oligochaetes in the group, demonstrating the proximity between the endoparasite D. lutzi and the free-living oligochaete D. superterrenus.

Assuntos

RESUMO

BACKGROUND: Rickettsia of the spotted fever group (SFG) has been reported in ticks and domestic animals in Campo Grande (CG), Midwest Brazil. METHODS: We searched for Rickettsia in the SFG in capybaras and their ticks in an urban park in the CG. RESULTS: The seropositivity rate was 88.2% (15/17). Although 87.7% of the capybaras sampled showed infestations with Amblyomma sculptum, A. dubitatum, and Amblyomma spp., no molecular results were detected in ticks. CONCLUSIONS: Since Rickettsia from the SFG circulates among capybaras in the urban parks of Campo Grande, this large rodent species should be monitored within the One Health Agenda.

Assuntos

RESUMO

ABSTRACT Background: Rickettsia of the spotted fever group (SFG) has been reported in ticks and domestic animals in Campo Grande (CG), Midwest Brazil. Methods: We searched for Rickettsia in the SFG in capybaras and their ticks in an urban park in the CG. Results: The seropositivity rate was 88.2% (15/17). Although 87.7% of the capybaras sampled showed infestations with Amblyomma sculptum, A. dubitatum, and Amblyomma spp., no molecular results were detected in ticks. Conclusions: Since Rickettsia from the SFG circulates among capybaras in the urban parks of Campo Grande, this large rodent species should be monitored within the One Health Agenda.

RESUMO

Hygiene failures in meat can be identified based on the evaluation of pathogenic microorganisms, which compromise the microbiological quality of food and can transmit food-borne diseases. The aim of the present study was to evaluate the hygienic quality of beef sold at supermarkets, butcher shops and public markets in the city of Campo Grande, state of Mato Grosso do Sul, Brazil, through the phenotypic and genotypic characterization of Salmonella spp. and Shiga toxin-producing Escherichia coli (STEC) as well as the investigation and quantification of Staphylococcus aureus. Seventy-one samples of beef from 17 commercial establishments were evaluated. Isolates were tested for antimicrobial susceptibility using the disk diffusion method recommended by the Clinical & Laboratory Standards Institute. Salmonella was found in 7.04% of the samples and 70.0% of the isolates were sensitive to the antimicrobials tested. A total of 25.35% of the samples were positive for Staphylococcus aureus, with counts ranging from 1.0 x 102 to 4.3 x 104 CFU/g; these isolates exhibited resistance to penicillin (87.5%), tetracycline (18.75%) and chloramphenicol (6.25%). None of the samples was positive for STEC. The detection of these pathogens in food poses a danger to public health, mainly due to the presence of antimicrobial-resistant isolates. These findings underscore the need for good hygiene and manufacturing practices at retail establishments.

As falhas na qualidade higiênico-sanitária da carne podem ser identificadas a partir da avaliação de microrganismos patogênicos que comprometem a qualidade microbiológica do alimento e podem veicular doenças de origem alimentar. O presente estudo objetivou avaliar a qualidade higiênica-sanitária de carnes bovinas comercializadas em supermercados, açougues e mercados públicos da cidade de Campo Grande (Mato Grosso do Sul, Brasil) por meio da pesquisa e caracterização fenotípica e genotípica de Salmonella spp. e Escherichia coli produtora de toxina Shiga (STEC) e pesquisa e contagem de Staphylococcus aureus. Foram avaliadas 71 amostras de carne bovina de 17 estabelecimentos comerciais que foram submetidas a pesquisa de detecção de Salmonella spp., Escherichia coli produtora de toxina Shiga (STEC) e pesquisa e contagem de Staphylococcus aureus. Os isolados obtidos foram submetidos ao perfil de sensibilidade aos antimicrobianos pelo teste de difusão em disco, de acordo com o Clinical & Laboratory Standards Institute (CLSI). Constatou-se a presença de Salmonella em 7,04% das amostras avaliadas, sendo que 70,0% dos isolados foram sensíveis aos antimicrobianos testados. Em relação ao Staphylococcus aureus, 25,35% das amostras foram positivas com contagens variando entre 1,0 x 102 a 4,3 x 104 UFC/g, sendo que os isolados apresentaram resistência para penicilina (62,5%), tetraciclina (18,75%) e cloranfenicol (6,25%). Nenhuma amostra apresentou-se positiva para STEC. A detecção desses patógenos em alimentos representa um perigo a saúde pública, principalmente, devido a presença de isolados resistentes a antimicrobianos. Além disso, ressalta-se a necessidade do emprego das boas práticas de higiene e fabricação nos estabelecimentos varejistas.

Assuntos

RESUMO

We aimed to detect DNA of Borrelia burgdorferi in whole blood and serum samples of patients with clinical symptoms and epidemiology compatible with Brazilian Lyme-like disease. Four patients with positive epidemiological histories were recruited for the study. Blood samples were collected, screened by serologic testing by ELISA and Western blotting and molecular identification of B. burgdorferi by amplifying a fragment of the conserved gene that synthesizes the hook flagellar flgE. The results showed positive serology and for the first time, the presence of B. burgdorferi sensu lato in humans in the Midwest region of Brazil. The resulting sequences were similar to GenBank corresponding sequences of B. burgdorferi flgE gene. By neighbor-joining the phylogenetic analysis, the flgE sequence of the Brazilian strain clustered in a monophyletic group with the sequence of B. burgdorferi sensu lato under 100% bootstrap support. This study opens up promising perspectives and reinforces the need for additional studies to determine the epidemiological characteristics of the disease, as well as the impact of the prevalence of Brazilian borreliosis in Mato Grosso do Sul State, Brazil.

Assuntos

RESUMO

Foi realizado um levantamento da infecção por Leptospira spp. em mamíferos silvestres do Pantanal sul-mato-grossense com o emprego da reação de soroaglutinação microscópica (SAM) e da reação em cadeia da polimerase (PCR). Os sorovares de maior frequência nos animais investigados foram Hardjobovis (28%), Icterohemorhagiae (12%), M-110/2006 (isolado de Cerdocyon thous; 16%), Canicola (L014 isolada de Bos taurus, 4%), Whitcombi (4%), Pomona (20%), Autumnalis (12%) e Copenhageni (M9/99 isolada de Rattus norvegicus, 4%). Das 79 amostras examinadas pela PCR, 21 (26,58%) foram positivas, com a amplificação de um fragmento de aproximadamente 331pb. Dois fragmentos amplificados obtidos de amostras de C. thous foram clonados, sequenciados e identificados como L. interrogans por análise filogenética.

A survey of Leptospira spp. in wild mammals from the southern Pantanal of Mato Grosso do Sul was performed by microscopic agglutination test (MAT) and polymerase chain reaction (PCR). The serovars most frequently found were Hardjobovis (28%), Icterohemorhagiae (12%), M110/2006 strain (isolated from Cerdocyon thous, 16%), Canicola (L014 isolated from Bos Taurus, 4%), Whitcombi (4%), Pomona (20%), Autumnalis (12%) and Copenhageni (M9/99 isolated from Rattus norvegicus, 4%). From the 79 samples tested by PCR, 21 (26.58%) were positive, resulting in the amplification fragment of approximately 331pb. Two amplified fragments from C. thous were cloned, sequenced and identified as L. interrogans by phylogenetic analysis.

Assuntos

RESUMO

Foi realizado um levantamento da infecção por Leptospira spp. em mamíferos silvestres do Pantanal sul-mato-grossense com o emprego da reação de soroaglutinação microscópica (SAM) e da reação em cadeia da polimerase (PCR). Os sorovares de maior frequência nos animais investigados foram Hardjobovis (28%), Icterohemorhagiae (12%), M-110/2006 (isolado de Cerdocyon thous; 16%), Canicola (L014 isolada de Bos taurus, 4%), Whitcombi (4%), Pomona (20%), Autumnalis (12%) e Copenhageni (M9/99 isolada de Rattus norvegicus, 4%). Das 79 amostras examinadas pela PCR, 21 (26,58%) foram positivas, com a amplificação de um fragmento de aproximadamente 331pb. Dois fragmentos amplificados obtidos de amostras de C. thous foram clonados, sequenciados e identificados como L. interrogans por análise filogenética.(AU)

A survey of Leptospira spp. in wild mammals from the southern Pantanal of Mato Grosso do Sul was performed by microscopic agglutination test (MAT) and polymerase chain reaction (PCR). The serovars most frequently found were Hardjobovis (28%), Icterohemorhagiae (12%), M110/2006 strain (isolated from Cerdocyon thous, 16%), Canicola (L014 isolated from Bos Taurus, 4%), Whitcombi (4%), Pomona (20%), Autumnalis (12%) and Copenhageni (M9/99 isolated from Rattus norvegicus, 4%). From the 79 samples tested by PCR, 21 (26.58%) were positive, resulting in the amplification fragment of approximately 331pb. Two amplified fragments from C. thous were cloned, sequenced and identified as L. interrogans by phylogenetic analysis.(AU)

Assuntos

RESUMO

This work reports a survey of Leptospira spp in pampas deer (Ozotoceros bezoarticus) in the Pantanal wetlands of the state of Mato Grosso do Sul, Brazil by serology and polymerase chain reaction (PCR). Seventy pampas deer were captured in the dry season and surveyed using PCR, microscopic agglutination test (MAT) (n = 51) and by both techniques (n = 47). PCR detected infections in two pampas deer and MAT detected infections in three. Through sequencing and phylogenetic analyses, the PCR-amplified fragment detected in deer was identified as Leptospira interrogans. Serovars Pomona and Butembo were detected using MAT and the highest titre was 200 for serovar Pomona. Epidemiological aspects of the findings are discussed.

Assuntos

RESUMO

This work reports a survey of Leptospira spp in pampas deer (Ozotoceros bezoarticus) in the Pantanal wetlands of the state of Mato Grosso do Sul, Brazil by serology and polymerase chain reaction (PCR). Seventy pampas deer were captured in the dry season and surveyed using PCR, microscopic agglutination test (MAT) (n = 51) and by both techniques (n = 47). PCR detected infections in two pampas deer and MAT detected infections in three. Through sequencing and phylogenetic analyses, the PCR-amplified fragment detected in deer was identified as Leptospira interrogans. Serovars Pomona and Butembo were detected using MAT and the highest titre was 200 for serovar Pomona. Epidemiological aspects of the findings are discussed.

Assuntos