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Silva MEP, Oliveira JR, Carvalho AG, Santos DG, Lima NCS, Santos FAG, Taborda RLM, Rodrigues RS, Dall'Acqua DSV, Matos NB. Colonization by Streptococcus pneumoniae among children in Porto Velho, Rondônia, Western Brazilian Amazon. BRAZ J BIOL 2022; 82:e260617. [PMID: 35830013 DOI: 10.1590/1519-6984.260617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Accepted: 05/26/2022] [Indexed: 11/22/2022] Open
Abstract
Streptococcus pneumoniae is one of the primary pathogens that are associated with acute respiratory infections (ARI) that cause high rates of morbidity and mortality among children under five years of age in developed and developing countries. This study aimed to determine the prevalence of nasopharyngeal colonization, the antimicrobial resistance profile, and the capacity for biofilm formation by S. pneumoniae isolated from children aged 0-6 years with ARI throughout the Porto Velho-RO. A total of 660 swabs were collected from children with ARI. Molecular and biochemical tests were performed to characterize the isolates. The disk-difusion method and the E-test were used for antimicrobial sensitivity testing (TSA). Biofilm formation capacity was assessed using microtiter plate assays, and serotype detection was acheived using polymerase chain reaction (PCR) analyses. The colonization rate for S. pneumoniae was 8.9% (59/660) and exhibited a high prevalence in children under 23 months of age 64.4% (38/59). The observed serotypes were 9V and 19F with frequencies of 1.7% (1/59) and 13.6% (8/59), respectively. The antimicrobial susceptibility test revealed 100% (59/59) sensitivity to vancomycin. In contrast, trimethoprim and oxacillin exhibited high resistance rates of 76.3% (45/59) and 52.5% (31/59), respectively. Of the biofilm-forming isolates, 54.8% (23/42) possessed resistance to some antimicrobials. In this study, S. pneumoniae showed high rates of antimicrobial resistance and the ability to form biofilms, as these are factors that favor bacterial persistence and can cause serious damage to the host.
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Affiliation(s)
- M E P Silva
- Fundação Oswaldo Cruz Rondônia - Fiocruz Rondônia, Laboratório de Microbiologia, Porto Velho, RO, Brasil.,Universidade Federal de Rondônia, Programa de Pós-graduação em Biologia Experimental, Porto Velho, RO, Brasil
| | - J R Oliveira
- Universidade Federal de Rondônia, Programa de Pós-graduação em Biologia Experimental, Porto Velho, RO, Brasil
| | - A G Carvalho
- Fundação Oswaldo Cruz Rondônia - Fiocruz Rondônia, Laboratório de Microbiologia, Porto Velho, RO, Brasil.,Universidade Federal de Rondônia, Programa de Pós-graduação em Biologia Experimental, Porto Velho, RO, Brasil
| | - D G Santos
- Fundação Oswaldo Cruz Rondônia - Fiocruz Rondônia, Laboratório de Microbiologia, Porto Velho, RO, Brasil
| | - N C S Lima
- Fundação Oswaldo Cruz Rondônia - Fiocruz Rondônia, Laboratório de Microbiologia, Porto Velho, RO, Brasil.,Centro de Pesquisa em Medicina Tropical - CEPEM, Porto Velho, RO, Brasil
| | - F A G Santos
- Universidade Federal de Rondônia, Programa de Pós-graduação em Biologia Experimental, Porto Velho, RO, Brasil.,Centro de Pesquisa em Medicina Tropical - CEPEM, Porto Velho, RO, Brasil
| | - R L M Taborda
- Fundação Oswaldo Cruz Rondônia - Fiocruz Rondônia, Laboratório de Microbiologia, Porto Velho, RO, Brasil.,Centro de Pesquisa em Medicina Tropical - CEPEM, Porto Velho, RO, Brasil
| | - R S Rodrigues
- Fundação Oswaldo Cruz Rondônia - Fiocruz Rondônia, Laboratório de Microbiologia, Porto Velho, RO, Brasil.,Centro de Pesquisa em Medicina Tropical - CEPEM, Porto Velho, RO, Brasil.,Instituto Oswaldo Cruz, Programa de Pós-graduação em Biologia Celular e Molecular, Rio de Janeiro, RJ, Brasil
| | - D S V Dall'Acqua
- Fundação Oswaldo Cruz Rondônia - Fiocruz Rondônia, Laboratório de Microbiologia, Porto Velho, RO, Brasil.,Universidade Federal de Rondônia, Programa de Pós-graduação em Biologia Experimental, Porto Velho, RO, Brasil.,Centro de Pesquisa em Medicina Tropical - CEPEM, Porto Velho, RO, Brasil
| | - N B Matos
- Fundação Oswaldo Cruz Rondônia - Fiocruz Rondônia, Laboratório de Microbiologia, Porto Velho, RO, Brasil.,Universidade Federal de Rondônia, Programa de Pós-graduação em Biologia Experimental, Porto Velho, RO, Brasil.,Centro de Pesquisa em Medicina Tropical - CEPEM, Porto Velho, RO, Brasil
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Soares IJA, Costa RF, Carvalho AG, Lemes PG, Zanuncio JC, Leite GLD, Assis Júnior SL. Oncideres saga Dalman: first record damaging Stryphnodendron adstringens Mart. Coville (Fabaceae) in Brazil. BRAZ J BIOL 2021; 82:e239747. [PMID: 34105681 DOI: 10.1590/1519-6984.239747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 11/11/2020] [Indexed: 11/21/2022] Open
Abstract
Oncideres females girdle tree branches of the Fabaceae family, interrupting the sap flow and turning the wood conditions ideal for their larvae development. The bark of Stryphnodendron adstringens (Mart.) Coville, a species native to the Brazilian Cerrado, is widely used in the traditional medicine. The objectives were to report, for the first time, Oncideres saga (Dalman), using S. adstringens as a host and to describe the pattern of branch girdling and oviposition distribution by this insect on these branches. The diameter at the base and the length of the girdled branches were measured and the number of incisions made by the O. saga females to oviposit, per branch section (basal, median and apical), counted. The emerged specimens were counted and the diameter of the exit holes measured. The average diameter at the base of the girdled branches was 2.5 ± 0.16 cm and the length was 90.6 ± 4.6 cm. The average number of incisions per branch was 37.7 ± 2.7. Damage by O. saga can reduce the growth and cause losses on S. adstringens, a tree with great extractivism potential.
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Affiliation(s)
- I J A Soares
- Laboratório de Entomologia Aplicada à Área Florestal - LEAF, Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais - UFMG, Montes Claros, Minas Gerais, Brasil
| | - R F Costa
- Laboratório de Entomologia Aplicada à Área Florestal - LEAF, Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais - UFMG, Montes Claros, Minas Gerais, Brasil
| | - A G Carvalho
- Departamento de Engenharia Florestal, Unversidade Federal de Viçosa - UFV, Viçosa, Minas Gerais, Brasil
| | - P G Lemes
- Laboratório de Entomologia Aplicada à Área Florestal - LEAF, Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais - UFMG, Montes Claros, Minas Gerais, Brasil
| | - J C Zanuncio
- Departamento de Entomologia/BIOAGRO, Unversidade Federal de Viçosa - UFV, Viçosa, Minas Gerais, Brasil
| | - G L D Leite
- Laboratório de Entomologia Aplicada à Área Florestal - LEAF, Instituto de Ciências Agrárias, Universidade Federal de Minas Gerais - UFMG, Montes Claros, Minas Gerais, Brasil
| | - S L Assis Júnior
- Departamento de Engenharia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri -UFVJM, Diamantina, Minas Gerais, Brasil
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Camargos PA, Almeida MS, Filho GL, Batista KW, Carvalho AG, Pereira CL. Blood stained cerebrospinal fluid responsible for false positive reactions of latex particle agglutination tests. J Clin Pathol 1994; 47:1116-7. [PMID: 7876387 PMCID: PMC502206 DOI: 10.1136/jcp.47.12.1116] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The accuracy of the latex particle agglutination test (LPAT) was assessed in blood stained cerebrospinal fluid (CSF) specimens from 166 paediatric patients, aged from three months to 13 years. A commercial LPAT kit was used to detect Haemophilus influenzae type b, Streptococcus pneumoniae, and Neisseria meningitidis A, B, and C soluble antigens. Culture of CSF specimens was used as the standard and all laboratory procedures were performed blind. The mean CSF erythrocyte count was 66,406 cells/mm3 in the cases and 11,560 cells/mm3 in the controls. The sensitivity and the specificity of LPAT were 83.8 and 94.0%, respectively, suggesting that LPAT is a useful diagnostic tool even in blood stained CSF specimens.
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Affiliation(s)
- P A Camargos
- Department of Pediatrics, School of Medicine, University of Minas Gerais, Brasil
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