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  • Title: Observations from a cluster survey on seasonality in neonatal tetanus.
    Author: Eregie CO, Ofovwe G.
    Journal: East Afr Med J; 1992 Nov; 69(11):619-21. PubMed ID: 1298618.
    Abstract:
    This report presents the observations on seasonality and neonatal tetanus (NNT) mortality from a cluster survey on NNT mortality conducted in Kano metropolis, Northern Nigeria. A two stage cluster sampling method was used for the survey. There were 2,623 live-births with 1778 (67%) occurring in the dry season (October-May). The NNT mortality rate was 20.6/1000 live-births. The magnitude of neonatal mortality and NNT mortality were 47.3 and 30.8 per 1000 live-births respectively for the wet season. These were much higher than the comparative figures for dry season. There was, however, no significant association between seasonality and NNT mortality since the same trend was observed for non-NNT deaths. In June-July 190, a 2-stage cluster survey was conducted in the city of Kano in northern Nigeria to examine the seasonality pattern of neonatal tetanus (NNT) mortality. (The dry season lasts from October to May. The harmattan, a dry and dusty wind, sweeps downs from the Sahara in December-January.) 67% of the 2623 live births occurred during the dry season. NNT was responsible for 68.35% of the 79 neonatal deaths. NNT mortality stood at 20.6/1000 live births. NNT mortality was higher in the wet season than the dry season, but the difference was not significant (30.8 vs 1.58; p .05). Overall neonatal mortality was also higher in the wet season than the dry season (47.3 vs. 21.9), but again the difference was not significant. These trends were insignificant because the trends for non-NNT mortality were comparable. NNT deaths peaked in June. Non-NNT deaths peaked in July. In conclusion, NNT mortality was not strongly linked to seasonality in northern Nigeria.
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