ABSTRACT
Novel coronavirus (nCoV) namely "SARS-CoV-2" is being found responsible for current PANDEMIC commenced from Wuhan (China) since December 2019 and has been described with epidemiological linkage to China in about 221 countries and territories until now. In this study we have characterized the genetic lineage of SARS-CoV-2 and report the recombination within the genus and subgenus of coronaviruses. Phylogenetic relationship of thirty nine coronaviruses belonging to its four genera and five subgenera was analyzed by using the Neighbor-joining method using MEGA 6.0. Phylogenetic trees of full length genome, various proteins (spike, envelope, membrane and nucleocapsid) nucleotide sequences were constructed separately. Putative recombination was probed via RDP4. Our analysis describes that the "SARS-CoV-2" although shows great similarity to Bat-SARS-CoVs sequences through whole genome (giving sequence similarity 89%), exhibits conflicting grouping with the Bat-SARS-like coronavirus sequences (MG772933 and MG772934). Furthermore, seven recombination events were observed in SARS-CoV-2 (NC_045512) by RDP4. But not a single recombination event fulfills the high level of certainty. Recombination mostly housed in spike protein genes than rest of the genome indicating breakpoint cluster arises beyond the 95% and 99% breakpoint density intervals. Genetic similarity levels observed among "SARS-CoV-2" and Bat-SARS-CoVs advocated that the latter did not exhibit the specific variant that cause outbreak in humans, proposing a suggestion that "SARS-CoV-2" has originated possibly from bats. These genomic features and their probable association with virus characteristics along with virulence in humans require further consideration.
O novo coronavírus (nCoV), nomeadamente "SARS-CoV-2", foi considerado responsável pela pandemia atual iniciada em Wuhan (China) desde dezembro de 2019 e foi descrito com ligação epidemiológica à China em cerca de 221 países e territórios até agora. Neste estudo, caracterizamos a linhagem genética do SARS-CoV-2 e relatamos a recombinação dentro do gênero e subgênero dos coronavírus. A relação filogenética de 39 coronavírus pertencentes a seus quatro gêneros e cinco subgêneros foi analisada usando o método de Neighbour-joining usando MEGA 6.0. Árvores filogenéticas do genoma de comprimento total, várias proteínas (espícula, envelope, membrana e nucleocapsídeo), sequências de nucleotídeos foram construídas separadamente. A recombinação putativa foi testada via RDP4. Nossa análise descreve que o "SARS-CoV-2", embora mostre grande semelhança com as sequências de Bat-SARS-CoVs em todo o genoma (dando semelhança de sequência de 89%), exibe agrupamento conflitante com as sequências de coronavírus do tipo Bat-SARS (MG772933 e MG772934) Além disso, sete eventos de recombinação foram observados em SARS-CoV-2 (NC045512) por RDP4. Mas nem um único evento de recombinação preenche o alto nível de certeza. A recombinação está alojada mais em genes de proteína de pico, principalmente, do que no resto do genoma, indicando que o cluster de ponto de interrupção surge além dos intervalos de densidade de ponto de interrupção de 95% e 99%. Os níveis de similaridade genética observados entre "SARS-CoV-2" e Bat-SARS-CoVs defendem que o último não exibe a variante específica que causa surto em humanos, sugerindo que "SARS-CoV-2" tenha se originado possivelmente de morcegos. Essas características genômicas e sua provável associação com as características do vírus, juntamente com a virulência em humanos, requerem uma consideração mais aprofundada.
Subject(s)
Phylogeny , Severe acute respiratory syndrome-related coronavirus/geneticsABSTRACT
"Introduction: Bio-medical wastes are of great importance due to its potential environmental hazards and health problems. The waste produced in the course of health care activities carries a higher potential for infection and injury than any other type of waste. It is estimated that annually 0.33 million tons of hospital waste is generated in India. The objective of this study is to analyze the medical waste management practices in different health care settings, analyze the risk perceptions of health care personnel and assess the attitude towards the waste management policies.Materials and methods:A cross-sectional study is conducted using a pre-tested questionnaire to assess the awareness, knowledge and practices on medical waste management among health care personnel in different health care settings in Mangalore city.Pullishery F,Panchmal GS, Siddique S, Abraham A. Awareness, Knowledge and Practices on Bio Medical Waste Management Among Health Care Professionals in Mangalore A Cross Sectional Study. IAIM, 2016; 3(1):29-355.Page 30 Results: Doctors, nurses, and laboratory technicians have better knowledge than sanitary staff regarding biomedical waste management. Knowledge regarding the color coding and waste segregation was found to be better among nurses and laboratory staff as compared to doctors. Conclusion:The management of hospital waste requires its segregation and removal from the health care establishments in such a way that it will not be a source of health hazards to those who are directly or indirectly related to the hospital environment. The segregation of waste in almost all hospitals is not satisfactory. Proper and judicious handling of Bio-medical waste continues to be a matter of serious concern for health authorities in India."
ABSTRACT
Calcifying epithelial odontogenic tumor is a rare benign epithelial odontogenic lesion that comprises from 0.2% to 1.1 of all odontogenic tumors. In the past a number of different names have been given to this lesion, such as calcifying ameloblastoma, cystic complex odontoma, uncommon ameloblastoma with calcifications and others. There is a need to study and explore various aspects of this tumour, this article gives a broad idea of the various aspects of this tumor and which aspect of this tumour needs more investigation
ABSTRACT
OBJETIVO: Estudar o perfil clínico-patológico de crianças indianas com linfadenopatia cervical e o papel da citologia aspirativa por agulha fina com ênfase especial na tuberculose como causa. MÉTODOS: Foram incluídas 89 crianças com faixa etária de 10 meses a 12 anos, admitidas em nosso hospital de abril de 2004 a março de 2005. Todos os pacientes foram submetidos a completa avaliação clínica e investigativa em relação à linfadenopatia cervical. Medidas de desfecho incluíram estado clínico e a capacidade de testes convencionais em categorizar tipos diferentes de linfadenopatia e sua utilidade no diagnóstico de linfadenite tuberculosa. A variabilidade interobservador foi analisada através do teste de kappa, tendo boa concordância. RESULTADOS: A hiperplasia reativa foi o tipo mais comum de linfadenite, seguida da granulomatosa. Os linfonodos do triângulo posterior unilateral foram o grupo afetado com maior freqüência no grupo de linfadenopatia cervical tuberculosa. A aspiração por agulha fina, seguida da coloração de Ziehl-Neelsen, histopatologia e cultura em associação, obteve sucesso em realizar o diagnóstico em 85,7 por cento dos casos de etiologia tuberculosa. CONCLUSÕES: A aspiração por agulha fina é uma ferramenta diagnóstica valiosa no tratamento de crianças com apresentação clínica de linfonodos cervicais aumentados. A técnica reduz a necessidade de procedimentos mais invasivos e dispendiosos, principalmente em países em desenvolvimento.Cultura e histopatologia, entretanto, devem ser consideradas em casos nos quais a citologia aspirativa por agulha fina não é diagnóstica.
OBJECTIVE: To study the clinicopathological profile of children from India with cervical lymphadenopathy and the role of fine-needle aspiration cytology with special emphasis on tuberculosis as a cause. METHODS: A total of 89 children in the age group of 10 months to 12 years, presenting to our hospital from April 2004 to March 2005, were included. All the patients underwent thorough clinical and investigational assessment vis-à-vis cervical lymphadenopathy. Outcome measurements included clinical status and ability of conventional tests to categorize different types of lymphadenopathy and their utility in diagnosing tubercular lymphadenitis. Interobserver variability was analyzed measuring kappa test and was found to be in agreement. RESULTS: Reactive hyperplasia was the most common type of lymphadenitis, followed by granulomatous involvement. Unilateral posterior triangle lymph nodes were the most commonly affected in the tubercular cervical lymphadenopathy group. Fine-needle aspiration followed by Ziehl-Neelsen staining, histopathology and culture in combination were able to perform the diagnosis in 85.7 percent of cases affected with tubercular etiology. CONCLUSIONS: Fine-needle aspiration is a valuable diagnostic tool in the management of children with the clinical presentation of enlarged cervical lymph nodes. The technique reduces the need for more invasive and costly procedures, especially in a Third World country. Culture and histopathology, however, should be considered in cases where repeated fine-needle aspiration cytology is non-diagnostic.