LIRAa points to a high risk of contamination by dengue, zika and chikungunya in JF

The incidence of outbreaks of the Aedes aegypti mosquito, which causes diseases such as dengue, chikungunya and zika virus is considered “high risk” in Juiz de Fora. This is the result of the second Rapid Index Survey of Aedes aegypti (LIRAa) of 2022, released by the City Hall this Thursday morning (19) after a survey carried out at the end of April. According to the Executive, the infestation index reached a score of 4.4, according to the classification of the Ministry of Health, which takes into account the risk of illness in the population from diseases transmitted by the mosquito and the number of positive recipients for the larva in the properties. inspected.

Among the 16 regions surveyed, only one is at low risk. In the other regions, eight showed medium risk and seven are at high risk. The locations have not yet been revealed. In the previous result, collected in February and revealed by the PJF in March, the score was 2.9, considered an alert situation. Below 1 the risk is low.

In parallel with LIRAa, suspected cases of diseases transmitted by the Aedes aegypti mosquito are starting to draw attention from the authorities. In the case of dengue, there were 59 notifications over the last two weeks, according to the epidemiological bulletin on urban arboviruses released by the State Department of Health (SES-MG) this Wednesday (18). To give you an idea, last week the state had confirmed 37 probable cases of dengue in Juiz de Fora, which shows an increasing trend in the city. In addition, there are nine suspected cases of chikungunya under investigation.

According to the manager of the Department of Epidemiological Surveillance, Louise Cândido, the city is in a period of alert, as the increase in cases is already observed in other regions of the country and in Juiz de Fora will be no different. According to the latest bulletin from the Ministry of Health, dengue records grew by about 40% in Brazil during the last three weeks, there were more than 757,000 probable cases, which exceeds the entirety of last year, when the country totaled 544,000 cases.


Drought period contributes to the emergence of cases

The trend is for an increase in dengue cases after the rainy season, so that there is the necessary time for the laying of the eggs of the vector mosquito, the hatching and the contact of the host with the virus that transmits the disease. “Between the end of April and the month of May, we already had an expectation of an increase in cases and we believe that now, after the rains, there will be more cases and we are working on vector control to prevent this increase from being significant”, says Louise.

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Based on the results of the first LIRAa, in February, the Municipal Plan for the Contingency of Arboviruses was launched with the aim of redirecting public actions according to each stage of the epidemic period. “We managed to keep the city between low and medium risk through mobilization actions, the realization of LIRAa, the decentralization of agents who went to work in areas with greater risk. So, several stages of the plan were made for this moment we are experiencing and as the number of cases advances, new measures are being implemented.”

Resistance to agent visits

Photo: PJF Archive/Disclosure

The partnership between public agencies and the population is essential to combat the disease, because, according to the manager of the Department of Epidemiological Surveillance, most of the identified outbreaks are inside homes. Thus, care and attention must be paid to the accumulation of water, especially in pots and flasks with standing water, as well as returnable dishes and bottles, in addition to abandoned or disused works, gutters and structures. Such objects are the most suitable for water storage, according to LIRAa.

According to Louise, the department has noticed a resistance from the population in letting agents into the homes, which prevents the inspection from being carried out and favors the proliferation of the mosquito. It is worth mentioning that all Endemic Combat Agents are uniformed with City Hall blouse and/or vest. In addition, every 15 days, cemeteries and workshops are inspected, which are strategic points for accumulating water.

The City also receives complaints from places with possible outbreaks, through the MonitorAr application, which can be accessed from any browser, in addition to platforms such as smartphones, tablets, notebooks and computers.

The main symptoms of dengue, zika and chikungunia

According to infectious disease specialist Marcos Moura, the symptoms of dengue, zika and chikungunya are very similar and may even resemble a viral syndrome. However, what marks arboviruses are sudden high fever associated with body pain, fatigue and malaise. “The intensity of these symptoms varies according to the disease, but normally chikungunya causes more intense joint pain and dengue causes more severe body pain, while zika is milder in terms of both pain and fever. However, what marks the zika well are the reddish spots that appear on the body, called a skin rash”, explains the doctor.

The infectologist points out that if the patient notices any of these symptoms, it is necessary to seek medical advice to have a prior diagnosis, due to the fact that febrile diseases can also be bacterial infectious diseases, which are serious and can lead to death. “In the case of dengue, there are signs of severity that the doctor can guide and diagnose early to avoid an unfavorable outcome for the disease”, says Marcos, who highlights the importance of not performing self-medication, as it can trigger complications and put the patient at risk. patient.

To prevent dengue, zika and chikungunya, it is essential to control the vector, which is the Aedes Aegypti mosquito, so it is important to avoid the accumulation of standing water, in addition to placing mosquito nets and using repellents in regions that have a lot of incidence of mosquitoes.

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