Mozambique: 3 additional wild polio cases reported

news desk @bactiman63

In a followed by In May, the Global Polio Eradication Initiative (GPEI) reported three additional cases this week in Tete province.

Image/Robert Herriman

This brings the total number of cases in the country to four.

According to the GPEI:

Two of the three new viruses are more closely related to the PVS1 isolated from the first case from Mozambique that appeared in March 2022 in the same province, indicating local circulation of PVS1 in the province and probably in the country. However, the PVS1 found in Magoe district (near the borders of Zimbabwe and Zambia), is an orphan virus that is more closely related to the virus found earlier in Malawi.

Subscribe to Outbreak News TV on YouTube

Genetic analysis further indicates that there are clearly at least two chains of transmission that co-evolve after the introduction of the virus to Tete province in Mozambique. Although it is difficult to speculate, the distribution of WPV1 and their genetic link suggest that missed transmission in border areas around Mozambique-Zimbabwe-Zambia cannot be ruled out.

Mozambique has implemented three rounds of vaccination using bOPV since the first case was detected in March. Evaluations of these cycles show gradual improvements in quality, cycle after cycle, although quality remains suboptimal in Tete province.