Journal or Publishing Institution: Dissertation (Master), State University of Campinas, Piracicaba.
Author(s): Gandin Filho, R.
Article Type: Study
Abstract:
Dengue has become, in recent years, a disease of great concern due to its
morbidity and mortality. Major efforts by government entities are involved in combating
the proliferation and control of this mosquito. In the municipality of Piracicaba, a new
technique was tested, which began in the year 2015, with the introduction of genetically
modified Aedes aegypti. The objective of the present study was to evaluate the
fluctuation of dengue disease in the municipality of Piracicaba and region in the years
2014 to 2017 before, during and after the release of genetically modified mosquitoes.
It is an exploratory descriptive study with spatial ecological design. The study was
conducted in the city of Piracicaba – São Paulo – BR and region, with data from the
period 2014 to 2017, obtained at the Health Portal of the State of São Paulo, Health
Secretariat, São Paulo State Epidemiological Surveillance Center Paulo. The data of
temperature (maximum, average and minimum) and monthly precipitation of rainfall in
Piracicaba for each year analyzed were extracted from the site of Agritempo –
Agrometeorological Monitoring System of Embrapa, in partnership with Cepagri of
Unicamp. The variables were: year, temperature, pluviometric index, neighborhoods,
sectors, and cities of the region. The longitudinal descriptive analysis in the period
comprised were realized and presented by means of table, maps of the municipality,
box plot chart and bar graphs of dengue cases. The results were: the year 2015 was
the one that presented the highest number of notification of the disease in the city of
Piracicaba-SP. The most affected neighborhoods were from the north and east sectors
of the city; in 2017, dengue showed a uniform behavior of a large drop in the number
of cases in all cities in the region of Piracicaba, which covers 26 cities. Rio Claro and
Limeira, cities where innovative technologies such as genetically modified mosquitoes
were not tested, were the cities that presented more drastic drops in relation to the
initial percentage in the year 2015. The year of 2017 was the one that presented drastic
notification of the disease in general. We concluded that it was not possible to attribute
the fall of dengue cases in Piracicaba and cities of the region in the year 2017 to no
specific factor isolated observing the studied variables – climatic conditions, actions
taken and application of new technologies, such as the release of genetically modified
mosquitoes. The sum of all variables studied may have contributed to this occurrence.
The phenomenon of herd immunization and the cyclical tendency of the disease should
also be considered. The use of transgenic mosquito technology may be better
evaluated after controlled studies, and for longer periods in different locations in the
country.
Keywords: Dengue. Aedes. Mosquito control. Mosquito vectors, OX513A, Genetically modified mosquito, Genetically engineered mosquitoes
Citation:
Gandin Filho, R., 2019. Dengue fluctuation in a medium-sized city, with
genetically modified mosquitoes: a longitudinal study. 2019. 61 f. Dissertation
(Master), State University of Campinas, Piracicaba.
Record ID: 2587
