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Neonatal sepsis and associated factors among newborns in hospitals of Wolaita Sodo Town, Southern Ethiopia

Authors Mersha A, Worku T, Shibiru S, Bante A, Molla A, Seifu G, Huka G, Abrham E, Teshome T

Received 2 November 2018

Accepted for publication 24 December 2018

Published 17 January 2019 Volume 2019:9 Pages 1—8

DOI https://doi.org/10.2147/RRN.S193074

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Editor who approved publication: Dr Robert Schelonka


Abera Mersha, Tilahun Worku, Shitaye Shibiru, Agegnehu Bante, Addis Molla, Genzeb Seifu, Girma Huka, Eyerusalem Abrham, Temesgen Teshome

Department of Nursing, College of Medicine and Health Sciences, Arba Minch University, Arba Minch, Ethiopia

Introduction: Neonatal sepsis is one of the most common reasons for admission to neonatal intensive care units in developing countries. It is also a major cause of mortality in both developed and developing countries. Hence, the main aim of this study was to assess the prevalence and factors associated with neonatal sepsis among newborns in hospitals of Wolaita Sodo Town, Southern Ethiopia.
Materials and methods: This hospital-based cross-sectional study was conducted in 275 newborns from April 22 to June 29, 2018. Structured interviewer-administered pre-tested questionnaire and check list were used to collect the data. The collected data were entered into Epi data version 3.1 and then exported into SPSS Windows version 22 for analysis. Bivariate and multivariate analyses were done by using binary logistic regression. The goodness of fit was tested by Hosmer–Lemeshow statistic and Omnibus tests. Multi-co-linearity test was carried out to determine the correlation between independent variables by using standard error and collinearity statistics. Variables with P<0.25 in the bivariate analysis were included in the final model, and statistical significance was declared at P<0.05.
Results: This study found that 33.8% (95% CI: 28%–39%) of the neonates had neonatal sepsis during admission. Factors such as maternal age, multiple per digital vaginal examination, exclusive and immediate breastfeeding within an hour, put on kangaroo mother care (KMC) within 1 hour, and neonatal age were statistically significantly associated with neonatal sepsis.
Conclusion and recommendations: This study indicated that the current rate of neonatal sepsis was still high. As such, strengthening the provision of health information on exclusive and immediate breastfeeding and KMC on postnatal and antenatal care services and decrease multiple per digital vaginal examination as not indicated should better to be promoted.

Keywords: neonatal sepsis, sepsis neonatorum, neonatal infection, neonatal intensive care unit, safe delivery, Ethiopia


Introduction

Neonatal sepsis is a condition defined as a clinical syndrome characterized by signs and symptoms of infection in an infant 28 days of life or younger. This manifested by systemic signs of infection and isolation of a bacterial or other pathogen from the bloodstream1 results in an estimated 750,000 annual deaths worldwide.2,3 Globally, sepsis is still one of the major causes of morbidity and mortality in neonates, despite recent advances in healthcare units. The estimated global burden for neonatal sepsis was 2,202 (95% CI: 1,099–4,360) per 100,000 live births, with mortality between 11% and 19%.4,5 More than 40% of under-five deaths occur in the neonatal period, resulting in 3.1 million newborn deaths each year.6

According to the Global Sepsis Alliance, infections leading to sepsis are responsible for about one-fifth of the world’s annual 2.7 million neonatal deaths, and in South Asia and sub-Saharan Africa, it was about 25% of all neonatal deaths.7 Incidence of neonatal sepsis is around 40 times higher and mortality rates are two times higher in middle-income countries than in high-income countries.4 Neonatal sepsis poses a massive public health burden for sub-Saharan Africa, with significant associated economic consequences.8 On the other hand, the survivors of neonatal sepsis are vulnerable to short- and long-term neurodevelopment morbidity.9

Neonatal sepsis is the major newborn killer in Ethiopia, which accounts for more than one-third (33%) of neonatal deaths.10,11 The Ethiopian population grows at a rate of 2.6% per annum and the majority of people (84%) reside in rural areas.12,13 According to the 2016 Ethiopia Demographic and Health Surveys, neonatal mortality declined from 49 deaths per 1,000 live births in 2000 to 29 deaths per 1,000 births in 2016, a reduction of 41% over the past 16 years.14 Although the causes of neonatal mortality are not well documented in Ethiopia, reports from a previous study identified neonatal sepsis, asphyxia, birth injury, tetanus, preterm birth, congenital malformations, and “unknown causes” as major reasons for neonatal mortality.12 Evidence from different studies conducted in different countries speculated that neonates who were diagnosed with suspected sepsis ranged from 4.3% to 75.1% among the neonates admitted to the neonatal intensive care units (NICUs).1522

Despite advancing healthcare system in Ethiopia, the admission of neonates to the NICU with infection, most typically sepsis, has been increased. But, there is limited study in Ethiopia, in study area that shows the recent status of neonatal sepsis and the affecting factors. Hence, this study was aimed at studying the prevalence of neonatal sepsis and factors affecting among newborns in hospitals of Wolaita Sodo, Southern Ethiopia.

Materials and methods

Study setting and period

This study was performed in hospitals of Wolaita Sodo from April 22 to June 29, 2018. Wolaita Sodo is one of the towns in South Nations, Nationalities and Peoples’ Region (SNNPR) of Ethiopia, and it is located 411 km from Addis Ababa, the capital city of Ethiopia, and 156 km from Hawassa, the regional town of SNNPR. Based on the 2018 Population Projection by the Central Statistical Agency, this town has a total population of 254,294, of whom 125,855 are men and 128,439 are women. The town has two hospitals Soddo Christian Hospital and Wolaita Sodo University Teaching Referral Hospital. Currently, Sodo is known for being the center of major health and education institutions in Ethiopia. Soddo Christian Hospital has been one of the ten surgical training centers in Africa. The hospital provides a full range of medical and surgical service, including orthopedic and general, maternity, and pediatrics. Wolaita Sodo University Teaching Referral Hospital is also located in this town and serves around 2 million people.

Study design

An institution (hospital)-based cross-sectional study design was employed.

Population

All neonates who were admitted to NICU of hospitals during the study period in Wolaita Sodo were the study population for this study.

Eligibility criteria

All neonates who were admitted to intensive care unit were included in this study, whereas neonates who were early discharged before data collection was completed but only card was available, incomplete patient chart information, and died on arrival (neonates expired without taking any investigation and treatment on arrival) were excluded from this study.

Sample size determination

Epi info7 software Stat Cal was used to calculate the sample sizes. To determine the prevalence of neonatal sepsis single population proportion and to identify the associated factors, two sample population proportion was used. The sample used for this study was 275, after adding non-response rate of 5% to the larger sample size which was 261.

Data collection methods

A pre-tested interviewer-administered questionnaire and check lists were used to collect the data. The tools were developed by reviewing different literatures. The information was collected during the admission of neonate to NICU and by reviewing the registration book records in labor ward, NICU, and gynecologic ward in each hospital.

Study variables

The prevalence of neonatal sepsis was the dependent variable, and sociodemographic characteristics of mothers, sociodemographic characteristics of neonates, and obstetric characteristics of mothers were independent variables for this study.

Data quality control

We followed the methods of Mersha23 and to ensure quality of data, the questionnaire and checklists were initially drafted in English, and then translated into a local language, “Amharic” by verified translators. Lastly, before data collection, the questionnaire was back translated into English to ensure accuracy. The tools were pre-tested in hospital with similar status. Data were checked for completeness, accuracy, clarity, and consistency before being entered into software. Proper coding and categorization of data were maintained for the quality of the data to be analyzed. Double data entry was used to ensure validity and compared with the original data.23

Data management and analysis

The collected data were coded and entered into Epi data version 3.1 in order to minimize logical errors and skipping patterns. Then, the data were exported to SPSS Windows version 22 for cleaning, editing, and analysis. Descriptive analysis was done by computing proportions and summary statistics. Then the information was presented by using simple frequencies, summary measures, tables, and figures. Bivariate and multivariate analyses were used to assess the association between each independent variable and the outcome variable by using binary logistic regression. Hosmer–Lemeshow statistic and Omnibus tests were conducted for model fitness. All variables with P<0.25 in the bivariate analysis were included in the final model of multivariate analysis in order to control all possible confounders. We followed the methods of Mersha23 that variables which were significant in previous studies and from context point of view were included in the final model even if the above criteria were not meet. Collinearity statistics was carried out to determine the correlation between the independent variables. The direction and strength of statistical association were measured by the OR with 95% CI. Adjusted OR along with 95% CI was estimated to identify the associated factors for neonatal sepsis. In this study, P-value <0.05 was considered to declare a result as a statistically significant association.

Ethical considerations

This study followed the principles of research ethics adopted by the 64th WMA General Assembly, Fortaleza, Brazil, October 201324 and amendments including approval by the Institutional Review Board (AMU-IRB) of College of Medicine and Health Sciences, Arba Minch University. All study participants were informed about the purpose of the study, their right to refuse participation, and written and signed voluntary consent was obtained from all study participants prior to the interview. The respondents were also informed that the information obtained from them would be treated with utmost confidentiality.

Results

Sociodemographic characteristics of the mothers

A total of 275 neonates were involved in this study with a response rate of 100%. The mean age of mothers of the neonates were 27.39 years (±6.51 SD). Of the respondents, married respondents constitute 199 (72.4%) and those lived in rural locations comprise 172 (62.5%). Protestant was the dominant religion (165 [60%]) (Table 1).

Table 1 Sociodemographic characteristics of mothers in hospitals of Wolaita Sodo, Southern Ethiopia, 2018 (n=275)

Obstetric characteristics of the mothers

Of the total mothers of the neonates, 183 (66.5%) were multipara and 229 (83.3%) had antenatal care follow-up. One hundred thirty-eight (60.3%) had one to three visit and 91 (39.7%) had four visits. One hundred forty-one (51.3%) of mothers gave birth with spontaneous vaginal delivery and 44 (16%) and 90 (32.7%) gave birth with instrument assisted and cesarean section, respectively. Regarding delivery assistant, 245 (89.1%) of mothers were assisted by health professionals (physicians, health offer, midwifes, and nurses). During labor, 212 (77.1%) mothers had ≤4 digital vaginal examination and 92 (33.5%) had foul smelling amniotic fluid. Seventy-five (27.3%) of mothers had history of pregnancy-induced hypertension, 46 (16.7%) had a urinary tract infection/sexually transmitted infection, and 41 (14.9%) had a history of chorioamionitis (Table 2).

Table 2 Obstetric characteristics of mothers in hospitals of Wolaita Sodo, Southern Ethiopia, 2018 (n=275)

Abbreviations: APH, antepartum haemorrhage; HEW, health extension worker; PROM, premature rupture of membrane; STI, sexually transmitted infection; TTBA, trained traditional birth attendant ; UTI, urinary tract infection.

Two hundred five (74.5%) neonates were delivered at hospital and 2.5% had at health post. For 36.7% of the mothers, the duration of labor was 12–24 hours and for the 16.7% it was <6 hours (Figures 1 and 2).

Figure 1 Place of delivery among mothers in hospitals of Wolaita Sodo, Southern Ethiopia, 2018 (n=275).

Note: *Home delivery and on the way to health facility.

Figure 2 Duration of labor among mothers in hospitals of Wolaita Sodo, Southern Ethiopia, 2018 (n=275).

Neonatal characteristics

More than half (61.5%) of the neonates were male and 183 (66.5%) were in the age group 0–7 days (early neonatal period) and the rest 92 (33.5%) were from 8 to 28 days (late neonatal period). Regarding gestational age, 196 (71.3%) had term (37–42 weeks), and 69 (25.1%) and 10 (3.6%) had preterm (<37 weeks) and postterm (>42 weeks), respectively. Majority of the neonates (88.4%) had Apgar score of ≥7, and 199 (72.4%) were macrosomia or weight at birth ≥4 kg. Two hundred nine (76%) of the neonates cried at birth and 92 (33.5%) of the neonates had resuscitated at birth. Nearly half (50.2%) had gavage feeding and 229 (83.3%) had been put on kangaroo mother care (KMC) within 1 hour after delivery (Table 3).

Table 3 Neonatal characteristics in hospitals of Wolaita Sodo, Southern Ethiopia, 2018 (n=275)

Abbreviations: KMC, kangaroo mother care; LBW, low birth weight.

Prevalence of neonatal sepsis

Of the total study participants, 26.9% (95% CI: 22%–32%) of the neonates had early onset of neonatal sepsis and 6.9% (95% CI: 4%–10%) of the neonates had late onset of neonatal sepsis. Overall, in this study 33.8% (95% CI: 28%–39%) neonates had neonatal sepsis.

Factors associated with neonatal sepsis

After controlling for cofounders in the multivariate model maternal age, multiple per digital vaginal examination, exclusive and immediate breastfeeding within an hour, put on KMC within 1 hour of delivery, and age of the neonate were significantly associated with neonatal sepsis. However, place of delivery, urinary tract infection/sexually transmitted infection of the mother, premature rupture of membrane (PROM), neonate cried at birth, and Apgar scores were not. Neonates of the mothers aged 20–34 years were 33% more likely to develop neonatal sepsis compared with age group <20 years, whereas digital vaginal examination ≤4 times were 90% less likely to develop neonatal sepsis compared with more frequent vaginal examination. Neonates who had exclusive and immediate breastfeeding within an hour were 86% and those who had been put on KMC within 1 hour were 94% less likely to acquire sepsis. Those neonates whose age ranged from 0 to 7 days were two times more likely to develop sepsis as compared to those whose age ranged from 8 to 28 days (adjusted OR=2.19, 95% CI: 1.01–4.79) (Table 4).

Table 4 Bivariate and multivariate analyses of factors associated with neonatal sepsis in Chencha District, Southern Ethiopia, 2018 (n=275)

Notes: aHome delivery and on the way to health facility. *P=0.048, **P=0.047, and ***P<0.001.

Abbreviations: KMC, kangaroo mother care; PROM, premature rupture of membrane; STI, sexually transmitted infection; UTI, urinary tract infection.

Discussion

The overall status of neonatal sepsis was 33.8% (95% CI: 28%–39%). Maternal age of 20–34 years was 4.33 times whereas neonatal age of 0–7 days was 2.19 times more likely to have sepsis or positively associated with neonatal sepsis. Those neonates from mothers with less frequent digital vaginal examinations (≤4 times), exclusive and immediate breastfeeding within 1 hour, and put on KMC within 1 hour were negatively associated (preventive) with neonatal sepsis with odds 0.1, 0.14, and 0.06, respectively.

The prevalence of neonatal sepsis in this study was lower compared with studies done in Egypt (45.9%) and Ethiopia (75.1%) and higher compared with the studies done at South Sinai, Egypt (8.6%), Southern-Eastern Mexico (4.3%), and Dar es Salaam, Tanzania (24%).1519 But, this finding was congruent with three studies done at Tanzania (29%, 31.4%, and 38.9%).2022 The reason for this difference is due to advance in health system nowadays that gives infuses on newborn health start from intrauterine life (training of healthcare providers on infection prevention in delivery ward and NICU, safe delivery practice, basic emergency obstetric care, and comprehensive emergency obstetric care), increasing the health seeking behavior, and socioeconomic status of the community.

In this study, maternal-related factors were significantly associated with neonatal sepsis. Of this, maternal age and multiple per digital vaginal examination had risk factors that predispose the newborn for sepsis. This was in line with study done in Tanzania and Ghana.21,25 But, it was incongruent with study done at Northern Ethiopia.26 This may be due to methodological, difference in the healthcare delivery system, socioeconomic, and cultural factors.

As stated in this study, finding KMC (skin to skin contact) and immediate and exclusive breastfeeding within 1 hour of delivery were significantly associated with neonatal sepsis. This finding was in line with study done in Zimbabwe, meta-analysis done by reviewing different literatures, and studies conducted in different parts of the world.2730 The reason for this is due to the fact that KMC increases mother to baby bonding, breastfeeding, and thermal protection better than conventional care and gives less opportunity for infections. In addition, immediate and exclusive breastfeeding serves as the starting point for a continuum of care for mother and newborn who can have long-lasting effects on health and development. Early initiation of breastfeeding provides adequate nutrition at appropriate time, immunological value from first milk (colostrum), which prevents hypothermia and hypoglycemia. The age of neonate was other significant effect for the occurrence of neonatal sepsis as reported by this study. The main reasons for this may be most newborns who harbor different infections agents during intrauterine life, intra-partum, and immediately after delivery show sign and symptoms during early period (0–7 days). Neonates are very sensitive to different infection agents during early period related to weakened immunity as compared to adults.

In multivariate analysis, maternal urinary tract infection or sexually transmitted infection, Apgar score <7 at fifth minute, crying immediately after birth, prolonged rupture of membrane, and place of delivery were not significantly associated with neonatal sepsis. This finding was incongruent with study done in Ghana, Egypt, south-eastern Mexico, Northern Ethiopia, and Mwanza Tanzani.17,18,22,25,26,31 The result of these incongruences may be due to the fact that the newborns are more susceptible for hospital as well as community-acquired infections in favor of maternal and neonatal factors. In addition, those discrepancies may be study setting, sociocultural, socioeconomic, and study period differences.

The limitation of this study was that the data might be subjected to recollection bias. The study might not show cause-and-effect relationship because the study design was cross-sectional.

Conclusion and recommendations

This study indicated that the prevalence of neonatal sepsis was still high. In general, this study identified that maternal age, multiple per digital vaginal examination, exclusive and immediate breastfeeding within an hour of delivery, put on KMC within 1 hour, and age of the neonate were factors affecting or predispose for neonatal sepsis. Based on these we would like to provide the following recommendations: strengthening the provision of health information on exclusive and immediate breastfeeding and KMC for mothers during postnatal and antenatal care services. Using Information Education Communication/Behavior Change Communication materials (posters, flip charts, wall paintings, manuals, brushers, and pamphlets) focused on breastfeeding and KMC to mobilize and sensitize the community. In addition, it should be recommended that the healthcare providers decrease multiple per digital vaginal examination as not indicated should better to be promoted. The other researchers do further investigation to identify other factors by using other tools and other study designs.

Data sharing statement

The data will not be shared in order to preserve participant anonymity.

Acknowledgments

Our unreserved thank goes to Arba Minch University for financial assistance. We would like to forward our deepest appreciation and thanks to the administrative bodies and healthcare providers in NICU of hospitals at Wolaita Sodo Town, data collectors, and study participants. Last but not least, we would like to say thank you to all the people who supported the study directly or indirectly. Arba Minch University, College of Medicine and Health and Sciences funded us for the data collection and stationary materials.

Author contributions

AM designed the study, was involved in data collection, did analysis and interpretation of the results, drafted the paper, and participated in preparing all versions of the manuscript. TW, SS, AB, AM, GS, GH, EA, and TT assisted in the design and proposal development, monitored data collection, assisted during analysis, and revised subsequent drafts of the paper. All authors contributed toward data analysis, drafting and critically revising the paper, gave final approval of the version to be published, and agreed to be accountable for all aspects of the work.

Disclosure

The authors report no conflicts of interest in this work.

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