Malaria is a potentially fatal infectious disease caused by a parasite that infect the female anopheles mosquito that feeds on humans [1] [2] . Malaria is caused by five different species of the protozoan plasmodium, P. falciparum accounting for 95% of severe cases of malaria, P. malariae, P. Ovale, P. vivax and P. knowlesi. Malaria still remains a major public health issue.

In Africa, 215 million cases of malaria were reported in 2019, distributed in 29 countries and accounting for 95% of the global burden for malaria [3] [4] . The most affected population age group in the sub-Saharan Africa were the under 5 years [5] [6] . Since 2012 WHO recommended the use of sulfadoxine-pyrimethamine and amodiaquine for SMC therapy in sub-Saharan Africa, while amodiaquine ensures rapid parasite clearance, sulfadoxine-pyrimethamine due to its half-lasting effect ensures a prolonged antimalarial effect on residual parasites [7] [8] [9] . Cameroon falls among the top ten sub-Saharan African countries with the highest burden of malaria. Malaria accounted for 25.9% of causes of consultation with 31.5% being children under the age of 5 years accounting for 14.3% of the country’s [10] .

In this light, the Cameroon government implemented in 2016 the WHO recommendation for prevention of seasonal malaria by initiating the program of SMC in children aged from 3 months to 59 months in these Regions [11] . However, the rate of admission in the Koza subdivision, Far North Cameroon remains high therefore justifying our study.

This was both a community based descriptive cross-sectional study in 3 randomly selected health areas in Koza subdivision through balloting, and a hospital based 7 years’ retrospective study at the Koza district hospital focused on children aged 3 months to 59 months. The survey went from February 2022 to April 2022.

Koza subdivision is located in the Far North region of Cameroon. It has of 87,043 inhabitants with a population density of 227.6 person/km² in 2005 [12] [13] . It shares international borders with Nigeria [12] . There is a rainy and dry season. They can be broken down into periods of dry and relatively cool from January to April, heavy rainfall from April to June, sporadically wet from June to November. Temperature reaches their maximum point from January to May. The annual rainfall is 400 - 900 mm/year with an average temperature of 26˚C [14] . During the raining season, the waterways elevate and cause floods. These floods serve as important breathing grounds for anopheles’ mosquitoes there by favoring high transmission seasons of malaria. The target population comprised of parents or tutors of children aged 3 - 59 months who resided in Koza for more than 12 months at least, files of children aged 3 - 59 months who were admitted and or died from severe malaria from the year 2015 to 2021 during the high transmission period (July-October). This was carried out in Adventist hospital of Koza II which serves as district hospital in Koza Subdivision. There is paucity of data on the level of implementation, of the SMC Program in children aged 03 to 59 months, following the initiation of this program in Koza subdivision, Far North Cameroon. The result of our study will provide statistical information on this topic in our setting. In addition, the results will help the health system, the government, and international organizations to review or ameliorate the strategies of SMC Program (Figure 1).

We used a multistage sampling technic whereby we randomly selected 3 health areas out of the 9 health areas found in Koza Subdivision. Next, Purposive sampling was done to select households from every health area and Snowboard sampling was used to select the rest of the households having children with the targeted age group. Records of children aged 3 to 59 months who were admitted or died from severe malaria during the period of high transmission (July-October) were obtained from Koza Adventist Hospital. Data from the community was collected using a structured questionnaire with opened and multiple-choice questions to interview participating parents or tutors. The questionnaires were translated into French for a better understanding of the population and pre-tested in Garoua a week before proper collection in the Koza subdivision. This was to ensure that the questions were within context and well understood by inhabitants of Garoua who are relatively more literate than the population in Koza. Once in Koza, two persons originating from Koza and who had a mastery of the different communities were trained on the questionnaire and helped in translating the questions from French to Mafa which was the local language thus making sure that the questionnaire was well understood by all levels of the population. The household’s selection was such that, when we reached a particular village in the selected health area, we took a haphazard direction. They determined the number of houses in that line and purposely selected a house in which resided children of the targeted age group. Then the investigator continued in the rest of the households with the target age group using the snowboard method until the required number is reached per health area. Together with the main investigator, we were responsible for leading the whole process of data collection and entered them directly in the KOBO collect toolbox. One week before the data collection, each health area was visited to confirm the appointment and prepare the setting for the following week. Data from medical records were extracted using a data extraction form.

General characteristics.

For us to achieve our objectives, we conducted a mixed study of both a community based descriptive cross-sectional study for a period of 3 months (February-April) and a hospital based retrospective study to analyze medical records of children who died from severe malaria during the study period.

In this study, majority (94%) of the participants were aware of SMC campaign. This finding was similar to that of Salissou et al. in Niger [15] who reported that 84% of participants were aware. Health personnel constituted the most important source of information it represented 95% of source of information this was similar to that of Salissou et al. in Niger [15] who reported health personnel as the main source of information. This can be explained by the fact that SMC campaigns are preceded by sensitization campaigns carried out by health personnel’s in the different communities.

Parents/tutors were well knowledgeable of the SMC program and had at least an idea on the use of SMC therapy with 96% of them reporting that it is used to prevent malaria in children. This was similar to finding of Diawara et al. in Mali [16] . This was followed by 49% who reported that it also helps eliminate malaria in the community, and 39% reported that it treated malaria and 10% reported that it prevented other diseases.

The overall knowledge on SMC therapy was good with all the participants having adequate knowledge on the program. Of the 15 questions asked to evaluate knowledge, two questions recorded 100% correct answer and 9 questions recorded above 90% correct answers, two question between 66% to 86% good answers and only two questions recorded 33% correct answers. The questions with poor answer rate were those on the number of tablets of SP and AQ given to children less than 11 months and above 12 months could barely be recalled by the parents or tutors giving a percentage of 33% for those who answered correctly. As a whole 99% of participants knew that on the 1^st day of a cycle, their children are to be given 2 tablets. Whereas for the 2^nd and 3^rd day of a cycle, 100% knew that 1 tablet is given per day this can be compared to 78% reported by Diop et al. in Senegal [17] .

Percentage of children in which caregivers reported side effects after the intake of the therapy were 23%. This is similar to 27% of children reported by parents in the study carried out by Salissou et al. in Niger [15] . The most common side effect observed was vomiting experienced by 72% of children. This finding was similar to that of Diop et al. in Senegal [16] and Oumar et al. in Mali [18] who reported vomiting as the most common side effect experienced by children at 73% and 69%. But this differed from the findings of and Elhaj et al. in Senegal [19] who reported diarrhea to be the most common side effect followed by vomiting.

We observed a relatively high coverage rate of SMC among eligible children. For the first cycle, the coverage rate obtained from interviewed participants was 100% and that obtained from SMC cards was 77%. These results were similar to those of Diawara et al. in Mali [16] and Salissou et al. in Niger [15] who reported 80% and 81% of coverage rates during the first cycle. However, this coverage rates were found dropping during consecutive cycles and were found to be only 62% and 56% from interviewed participants and from SMC cards. This shows how important it is to observe a closed and continuous monitoring of SMC cycles over time to avoid this decrease in coverage per cycles. Diawara et al. in Mali [16] reported the similar changes in coverage per cycles. The rate of SMC coverage according to SMC cards were 77%, 70%, 67%, and 56% for the 1^st, 2^nd, 3^rd and 4^th cycles respectively this was low compared to the coverage rate calculated by interviewed participants which were 100%, 93%, 83% and 62% for the 1^st, 2^nd, 3^rd and 4^th cycles respectively. This difference could be as a result of cards not properly filled by health personnel and/or parents and also due to the lack of available cards to every household.

Overall 84% of participants interviewed were taught on how to administer the therapy to their children, 73% were informed on the different side effects and 72% were taught on what to do in case of any side effect. This shows the effectiveness of health personnel when it comes to educate the parents about SMC programs.

Overall, 85% of participants were satisfied with the program. This was similar to Diawara et al. in Mali [16] and Salissou et al. in Niger [15] who reported 90% and 85% satisfaction respectively. From all the participants interviewed, 14% reported not to be satisfied with the program and majority reported they will like the tablets to be changed to syrups to ease ingestion by children.

A rise in the mortality from 2016-2019 was observed in this study. This rise could be explained by the fact that during that period, the sociopolitical instability may have caused the population not to have an easy access to health facilities. This was found to be improving with time the mortality was found to be decreasing when socio-political issues were better controlled and the program was able to outreach maximum children thus explaining the decrease in trend observed in the years 2020 and 2021.

SMC is a program well known and accepted by parents/tutors of Koza subdivision. The coverage rate was high thus the program is well implemented. Through social mobilization and communication, the coverage could be further improved and strengthen SMC impact. The most common side effect experienced by children was vomiting. The mortality was found to be decreasing when socio-political issues better controlled and the program was able to outreach maximum children.

This study was part of a thesis to defend a Doctor of Medicine degree at the Faculty of Health Sciences, University of Buea—Cameroon. We thank the Dean of the Faculty of Health Sciences, University of Buea for giving us the authorization to conduct this research. All the staff of the Koza District Health Service and the Director of the Koza Adventist Hospital for their support throughout the study period, we are grateful!

This research did not receive a specific grant.

The authors declare that they have no competing interest.

Yolande, D.P.F., Helene, K.S., Diomede, N.N., Gabrielle, M.T.M., Yanelle, W., Wilfried, G.W., Nicolas, T. and Sisyi, V.V. (2023) Level of Implementation of Seasonal Malaria Chemoprevention in Children Aged between 3 to 59 Months in Koza, Far North Region of Cameroon. Open Journal of Pediatrics, 13, 707-718. https://doi.org/10.4236/ojped.2023.135079