Guiné-Bissau, país da África Ocidental que divide com o Brasil o idioma português, é o último país a notificar casos de transmissão do vírus zika por meio do mosquito Aedes aegypti. A informação está no último boletim da Organização Mundial da Saúde (OMS), divulgado na última quinta-feira (7).
A agência de saúde da ONU anunciou no mesmo documento uma missão ao país para ajudar a entender a linhagem do vírus detectado utilizando sequenciamento viral. A missão também vai se concentrar na identificação de atividades prioritárias para reforçar a capacidade de resposta nacional.
O Brasil continua sendo o país que concentra a absoluta maioria de casos investigados e confirmados de microcefalia e/ou alterações do sistema nervoso central – 1.638 até 25 de junho. O segundo país de maior preocupação é a Colômbia, com apenas 13 casos.
Até o dia 6 de julho, 65 países e territórios haviam relatado evidências de transmissão do vírus zika transmitido por vetores desde 2007. Desse total, 62 relataram evidências desde 2015, sendo 48 já a partir de 2015, quatro em 2016 e outros 13 com evidências de infecções por zika transmitidas por vetores locais em ou antes de 2015, porém sem a documentação de casos em 2016, ou com o surto já encerrado.
Acesse o último boletim da OMS, abaixo:
Zika situation report 7 July 2016
Zika virus, Microcephaly and Guillain-Barré syndrome
Summary
· WHO and partners have established a definition of what constitutes an outbreak, endemic transmission, and the interruption of vector-borne transmission in order to better characterize the level of transmission of Zika virus infection (Table 1, Fig. 2). In addition, this will facilitate public health recommendations for residents and travellers. Based on these definitions, countries and territories reporting mosquito-borne Zika virus transmission were reclassified.
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· As of 6 July 2016, 65 countries and territories (Fig. 1, Table 1) have reported evidence of vector-borne Zika virus transmission since 2007 (62 of these countries and territories have reported evidence of vector-borne Zika virus transmission since 2015):
o 48 countries and territories with a first reported outbreak from 2015 onwards (Table 1).
o Four countries are classified as having possible endemic transmission or have reported evidence of local vector-borne Zika infections in 2016.
o 13 countries and territories have reported evidence of local vector-borne Zika infections in or before 2015, but without documentation of cases in 2016, or with outbreak terminated.
· Guinea-Bissau is the latest country to report mosquito-borne Zika virus transmission.
· Eleven countries have reported evidence of person-to-person transmission of Zika virus, probably via a sexual route (Table 2). Spain is the latest country to report Zika infection through person-to-person transmission.
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· As of 6 July 2016, microcephaly and other central nervous system (CNS) malformations potentially associated with Zika virus infection or suggestive of congenital infection have been reported by 13 countries or territories. Three of those countries reported microcephaly cases born from mothers with a recent travel history to Zika-affected countries in Latin America (Table 3).
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· As of 6 July, the United States Centers for Disease Control and Prevention (US-CDC) reported seven live-born infants with birth defects and five pregnancy losses with birth defects with laboratory evidence of possible Zika virus infection.
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· In the context of Zika virus circulation, 15 countries and territories worldwide have reported an increased incidence of Guillain-Barré syndrome (GBS) and/or laboratory confirmation of a Zika virus infection among GBS cases (Table 4).
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· Based on research to date, there is scientific consensus that Zika virus is a cause of microcephaly and GBS.
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· A case of GBS has recently been confirmed positive for Zika virus in Jamaica.
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· Zika virus infections were diagnosed in eight cases with severe neurologic conditions in Guadeloupe.
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· A WHO mission to Guinea-Bissau will be conducted to assist in understanding the lineage of the Zika virus detected in the country using viral sequencing. The mission will also focus on the identification of priority activities to strengthen national response capacity.
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· The global Strategic Response Framework launched by WHO in February 2016 encompasses surveillance, response activities and research. An interim report3 describing some of the key activities being undertaken jointly by WHO and international, regional and national partners in response to this public health emergency was published on 27 May 2016. A revised strategy for the period of July 2016 to December 2017 was published on 17 June.
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· WHO has developed new advice and information on diverse topics in the context of Zika virus.5 WHO’s latest information materials, news and resources to support corporate and programmatic risk communication and community engagement are available online.
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