Descripción: “...Conclusions: carriers of the strain tested with IFD and PCR are shown to be healthy, nevertheless the live bacteria remains the prototype of the illness and for this reason the study is inconclusive in its findings. A process of continual assessment intothe condition of the B.Pertussis carriers is necessary in order to ascertain whether, amongst those diagnosed by live cultures, there are not those who are asymptomatic carriers.Keywords: B.Pertussis, whooping cough, nasopharyngeal, direct immunofluorescence (IFD), polymer (PCR) chain reaction. ...”

Descripción: “...While the income per capita in the developing world since the turn of the Millennium has grown faster than that of the developed world, the question whether there is an ongoing process of catching up between countries remains. ...”