Currently there are many questions on the internet about the report which says it is more likely that the increased occurrence of microcephaly is due to the use of a pesticide than the spread of the virus zika.

zikaIt is about the pesticide pyriproxfen – larvicide intended to combat the mosquito “Aedes aegypti” who spread the virus zika. The producer of this pesticide is the company “Sumitomo Chemicals” which is associated with the agricultural giant Monsanto.

“In the areas where they live most of the infected persons, chemical larvicide causing malformations in mosquitoes, has been used for 18 months, and this poison (pyriproxyfen) is put in the drinking water used by the affected population, because of the government’s order” – said in report of the Argentine group “Physicians in Crop-Sprayed Towns (PCST)” which was published last week.

The group added that “It is not a coincidence” that the number of cases of microcephaly increased in Brazil where it is used pyriproxfen , while in Colombia, zika infections are not associated with microcephaly and despite the fact that Colombia is on the second place of the number of affected with zika virus.

In addition, in Brazil, all cases of microcephaly are not related to the virus zika. “Once the experts examined in detail 723 cases, they found that over half of them were not related to microcephaly, nor with zika virus” – wrote “Washington Post”, last month.

As a reaction to the report one Brazilian state suspended the use of pyriproxyfen.

However, what exactly is about in this case?

While some say the evidence showing the connection of pyriproxfen with microcephaly are “convincing”, others call this “conspiracy theory” and the World Health Organization (WHO) insists pyriproxfen is safe for use in the recommended amounts.

Realistically, there are currently only circumstantial evidence that pyriproxfen in drinking water in Brazil may increase the risk of microcephaly and that this association is stronger when there is no definitive causal link between neurological disease and virus zika. People are looking for answers, so it is understandable that the new evidence or hypotheses are largely focused in an attempt to make sense of what is happening now.

But is the lack of scientific evidence of the link between the microcephaly and virus zika is equal to lack of scientific evidence for linking the pyriproxfen with microcephaly? Not quite!

When WHO explicitly states that the relationship between microcephaly and virus zika is yet to be confirmed, here not about a lack of scientific evidence, but actually they are given more time scientists, which it is necessary to complete the examinations properly.

If you need to explicitly say that there is a connection, they need to be 100 percent sure that it is supported by solid evidence showing how virus zika infection causes biological changes in the fetus seriously impair growth.

“Unlike the relationship between virus zika and microcephaly virus that was confirmed by tests that showed the presence of the virus in blood samples, tissues and amniotic fluid, the connection between the use of pyriproxfen and microcephaly, has no scientific basis,” – says from the government Brazil.

“It is important to note that in places where pyriproxfen is not used, were detected cases of microcephaly.”

Director of the Department of Disease Control and the Department of Health of Pernambuco in Brazil, George Dimesh for “BBC” emphasizes that the city of Recife currently has the highest number of reported cases of microcephaly and that in this region pyriproxfen is not used, but another insecticide. Neurologist Vanessa van der Linden said “The changes we see in scanning babies suggest that damage is caused by congenital infection, not from insecticide or vaccine.

Given the circumstantial evidence of the connection with microcephaly with pyriproxfen then it is a wonder why microcephaly is not larger global problem. This pesticide is approved for use in the US and in Europe is used for years – although not in drinking water, as is the case in certain regions in Brazil.

There are still many issues associated with the appearance of microcephaly that escalated in recent months and years. Many of them would not be immediately answered if scientists do not go out and say that there is definitely a connection between virus zika and microcephaly.