Andrew Batholomaeus, a consultant toxicologist at Australia's University of Canberra and the University of Queensland, states that «the potential human health consequences of discouraging the use of pyriproxyfen in drinking water storage and other mosquito - reduction programs is catastrophic with potential deaths and serious disease from otherwise avoidable malaria, dengue and other mosquito - borne diseases numbered in at least the hundreds of thousands.» (businessinsider.com)
Thirdly, Catego contains Pyriproxyfen which is an insect development inhibitor, technically robbing the flea of any capability to reproduce by altering the growth and development of eggs and larvae. (mypetneedsthat.com)
On the other hand, Pyriproxyfen works by preventing the juvenile forms of fleas to grow or reach maturity. (mypetneedsthat.com)