Skip to main content

Neonatal sepsis in Sana’a city, Yemen: a predominance of Burkholderia cepacia



Neonatal sepsis is a global concern with increasing morbidity and mortality. The burden of neonatal sepsis is highest in developing countries, especially in those lacking proper surveillance systems. The causative pathogens and their drug-resistance levels vary between countries with emergence of multidrug resistance organisms. Thus, accurate records on the recent trends of organisms causing neonatal sepsis will provide vital information for appropriate intervention. We aimed to investigate neonatal sepsis, identify its associated factors and causative pathogens and to assess the antibiotic susceptibility patterns in Sana’a city, Yemen.


A cross-sectional study was conducted on neonates admitted to intensive care units of six hospitals in Sana’a city, Yemen, in the period from January 15, to March 30, 2020. Natal and prenatal medical data were collected using well-structured questionnaire. Neonates were subjected to sepsis work-up including blood culture, complete blood count and C-reactive protein. Organisms were identified by Gram staining and analyzed by the VITEK II system for bacterial bio-typing and antibiotic susceptibility testing.


Of the 199-neonates with suspected neonatal sepsis, 154 (77.38%) had culture-proven sepsis. Early-onset neonatal sepsis (EOS) was higher (50.25%; 100/199) than late-onset neonatal sepsis (LOS) (27.13%; 54/199). Multivariable analysis identified vaginal delivery as an independent risk factor for neonatal sepsis p = 0.005. Majority of isolated bacteria (74.39%) were gram-negative with Burkholderia cepacia (39%) and Klebsiella oxytoca (13%) being the most common pathogens of EOS and LOS. The most common gram-positive pathogens were Staphylococcus haemolyticus (9.1%) and Staphylococcus epidermidis (7.1%). B. cepacia showed multidrug resistance except for cefepime. All Klebsiella species isolates (100%) and most Pantoea species (93%) were ESBL and carbapenemase positive. All Escherichia coli and Acinetobacter baumannii isolates were ESBL positive. A significant number of gram-positive bacteria showed resistance to vancomycin.


The study findings show a high proportion of neonatal sepsis among neonates admitted to hospitals in Sana’a city with antibiotic-resistant B. cepacia being the single most common pathogen causing EOS and LOS. Findings also emphasize the emerging threat of multidrug-resistant bacteria in neonatal units and will help develop evidence-based management of neonatal sepsis in Yemen.

Peer Review reports


Neonatal sepsis is a leading cause of neonatal morbidity and mortality worldwide. The global burden of neonatal sepsis and other neonatal infections was estimated at 22 million disability-adjusted life-years (95% UI: 18.9–28.0) [1]. In developing countries, neonatal sepsis is responsible for more than 50% of neonatal deaths. It includes EOS, which occurs within 72 h after birth and LOS [2]. The two types of infections have different clinical manifestations, epidemiology, and pathogens patterns [3,4,5,6].

Pathogens causing neonatal sepsis are either acquired from the maternal flora or postnatally from the hospital or community [7]. Bacteria are the most common pathogens, and they vary in the distribution between countries, regions and according to the disease onset EOS versus LOS [7]. The commonly involved bacteria in developing countries include Klebsiella species, Staphylococcus aureus, E. coli, and Group B Streptococcus [8, 9]. Recently, B. cepacia, a bacterial pathogen that has intrinsic drug resistance and ability to live inside drug products [10, 11], has emerged as a significant pathogen causing neonatal sepsis [12,13,14,15,16].

Yemen is suffering of an ongoing war that started in 2015. The war has destroyed the health system, rendering health facilities either not functioning or partially functioning [17]. There is a paucity of information about neonatal sepsis including its types, causative pathogens patterns and antibiotic susceptibility. Therefore, this study aimed to investigate neonatal sepsis, identify its associated factors and causative pathogens, and to assess the antibiotic susceptibility patterns in Sana’a city, Yemen. Findings from this study will fill gaps of knowledge about neonatal sepsis in Yemen, helping public health authorities to develop an effective control strategy to combat the disease, and guide Yemeni physicians to implement an evidence-based approach for the clinical management of neonatal sepsis.


All methods were carried out in accordance with the relevant guidelines and regulations.

Study design and subjects

This was a cross-sectional study conducted on neonates admitted to neonatal units in six major hospitals in Sana’a city; Al-Kuwait, C-Plas, Al-Gumhory, Al-Sabeen, AL-Thawra, and Family hospitals, in the period from January 15 to March 30, 2020. Neonates who were admitted for at least 72 h with suspected sepsis during the study period were included. Neonates with congenital anomalies and hemolytic jaundice were excluded from the study.

Diagnosis of neonatal sepsis

Neonatal sepsis was suspected based on the presence of clinical signs or risk factors according to the international recommendations [18] and confirmed as neonatal sepsis if blood culture was positive [18, 19]. Neonatal sepsis was then classified into EOS and LOS [19].


Bio and socio-demographic data were collected using a standard questionnaire by face-to-face interviews with the neonate’s mothers. The health condition of the mothers and clinical manifestations of the neonates were collected by physicians using standard tools. Written informed consent was obtained from guardians of all neonates after explaining the study objectives. All procedures described in this study were approved by the Research and Ethics Committee of the Faculty of Medicine and Health Sciences, University of Science and Technology, Sana’a (Approval No. EAU/UST122).

Laboratory investigations

Laboratory investigations were performed according to standard microbiological techniques [20]. Under aseptic conditions, trained nurses collected blood samples that were used for laboratory investigations of complete blood counts, C-reactive proteins and blood culture. For culture, at least 1 ml of blood was inoculated into BacT/Alert PF plus culture bottle (BIOMERIEUX, France, LOT 4053532) and incubated until the BacT/Alert instrument (BACTEC 9050, Becton Dickinson) signals it either as positive or negative. All positive samples were sub-cultured on choclate agar, blood agar, and MacConkey agar and incubated at 37 °C for 24–48 h. Gram-staining was conducted to differentiate between gram-positive and gram-negative bacteria. A sufficient number of colonies of pure culture was used to suspend the microorganism in 3.0 ml of sterile saline test tube. Pure bacterial suspension was added to bacterial specific identification and sensitivity testing kit device and analyzed by the VITEK II system for bacterial bio-typing and antibiotic susceptibility patterns as instructed in the product information manuals (BIOMERIEUX). VITEK® GN ID identification card (lot 2410933203) was used to characterize gram-negative bacteria and VITEK® GP ID identification card (lot 2420938203) was used to characterize gram-positive bacteria. Different cards were used to perform antibiotic susceptibility tests; AST-GN 87 (lot; 6770912203), AST-GN 72(lot; 5921083103) and AST GN75 (lot; 5951129403) for gram-negative bacteria and AST-GP67 (lot; 1321137103) for gram-positive bacteria. All procedures were conducted for routine diagnostic and therapeutic reasons.

Statistical analysis

Data were analyzed using IBM SPSS Statistics for Mac, version 23.0 (IBM Corp., Armonk, NY, USA). Categorical variables were presented in frequencies. The association between independent and dependent variables was tested using Pearson’s Chi-squared with reporting odds ratio (OR) and 95% confidence interval (CI). Fisher’s exact test was used when applicable. Multivariable analysis using the binary logistic regression model was conducted, including all variables, and the adjusted OR with its corresponding 95%CI was reported. A p-value of < 0.05 was considered significant.

Ethical consideration

The study protocol was approved by the Research and Ethics Committee of the Faculty of Medicine and Health Sciences, University of Science and Technology, Sana’a, Yemen (Approval No. EAU/UST122).


Characteristics of the patients

A total of 199 neonates admitted to referral hospitals in Sana’a city, Yemen, were enrolled in this study. Nearly half of neonates (84, 42.2%) were preterm, majority of them (70, 83.3%) were moderates to late preterm. More than half of neonates (109, 54.8%) were low birth weight. A total of 113 neonates (56.8%) were born by vaginal delivery. The age of 133 neonates (66.8%) was less than 72 h on admission. Tachypnea, lethargy and poor feeding were the most common clinical manifestations observed among neonates (Table 1).

Table 1 Characteristics of neonates with suspected sepsis admitted to referral hospitals in Sana’a city, Yemen, in the period from January 15 to March 30, 2020 (N = 199)

Culture-confirmed neonatal sepsis and its associated factors

Majority of neonates 77.38% (154/199) had positive blood culture. Of them, 50.25% (100/199) had EOS. Neonates born by vaginal delivery were at three-times higher risk of neonatal sepsis (OR = 3.08, 95% CI 1.54, 6.16; p = 0.002) than those whose deliveries were through Cesarean section. Although most neonates born at home acquired neonatal sepsis (OR = 2.8; 95% CI 0.81, 9.87; p = 0.09), the significance of association was in the borderline (Table 2). Multivariable analysis using binary logistic regression model identified vaginal delivery as an independent risk factor for neonatal sepsis (adjusted OR = 3.0; 95% CI 1.40, 6.33, p = 0.005).

Table 2 Factors associated with culture-confirmed neonatal sepsis among septic neonates admitted to referral hospitals in Sana’a city, Yemen, in the period from January 15 to March 30, 2020 (N = 199)

Clinical manifestations and hematological factors associated with culture-confirmed sepsis

Culture confirmed neonatal sepsis was significantly associated with hyperthermia (p = 0.045) and convulsion (p = 0.01). Poor feeding, jaundice, irritability, and lethargy were not significantly associated with neonatal sepsis. Elevated C-reactive protein was significantly associated with neonatal sepsis (p = 0.001). One-third (32%) of neonates with proven sepsis had normal white cell counts and two-thirds (59%) had normal platelets counts (Table 3).

Table 3 Association of clinical manifestations and hematological factors with culture-confirmed sepsis among septic neonates admitted to referral hospitals in Sana’a city, Yemen, in the period from January 15 to March 30, 2020 (N = 199)

Pathogens causing neonatal sepsis

Table 4 represents the distribution of pathogens causing neonatal sepsis. Out of the 154 neonates with culture-confirmed sepsis, 152 were infected by bacteria, while two were infected by Candida albicans. Of the 152 neonates with proven bacterial culture, nine had mixed bacterial growth. We isolated 161 bacterial pathogens, 119 (74%) were gram-negative while 42 (26%) were gram-positive. B. cepacia (37%) was the most common organism causing neonatal sepsis with higher prevalence among EOS (38%) than LOS (35%), followed by K. oxytoca (11.6%), which was higher among LOS (14.8%) than EOS (10.0%). Pantoea agglomerans caused neonatal sepsis in nine neonates (5.8%). The main gram-positive pathogens were S. haemolyticus (9.1%), S. epidermidis (7.1%) and Staphylococcus hominis (5.1%). Coagulase-negative Staphylococci (CONS) was the most common gram-positive organisms. S. haemolyticus emerged as the most frequently CONS.

Table 4 Organisms causing neonatal sepsis among neonates admitted to referral hospitals in Sana’a city, Yemen, in the period from January 15 to March 30, 2020 (N = 154)

Antibiotic susceptibility

Most isolated pathogens showed antimicrobial resistance (AMR) to the commonly used antibiotics (ampicillin, gentamicin, amikacin), cephalosporins and carbapenems (Tables 5 and 6). B. cepacia, the most common pathogen caused neonatal sepsis in this study, was highly resistant to ampicillin/sulbactam, gentamicin, tobramycin, tetracycline, amoxicillin/clavulanic acid, cefalotin, cefazolin, cefuroxime, cefoxitin, cefpodoxime, imipenem, and amikacin. However, it was 100% susceptible to cefepime. K. oxytoca was susceptible to gentamicin, ciprofloxacin, levofloxacin, tetracycline, nitrofurantoin, and trimethoprim/sulfamethoxazole. Klebsiella species (100%) and Pantoea species (93%) were carbapenemase positive and ESBL positive. All isolates of E. coli and A. baumannii were ESBL positive (Table 5). A significant number of gram-positive isolates were resistant to vancomycin. Most gram-positive bacteria were cefoxitin screening positive and sensitive to moxifloxacin, linezolid and rifampicin. S. haemolyticus isolates were resistant to ampicillin and gentamicin (Table 6). Staphylococcus species showed resistance to fluoroquinolones (ciprofloxacin).

Table 5 Antibiotic resistance levels of gam-negative bacteria isolated from septic neonates admitted to referral hospitals in Sana’a city, Yemen, in the period from January 15 to March 30, 2020
Table 6 Antibiotic resistance levels of gam-positive bacteria isolated from septic neonates admitted to referral hospitals in Sana’a city, Yemen, in the period from January 15 to March 30, 2020


In this multicentric cross-sectional study we report a high proportion of culture-confirmed neonatal sepsis, accounting for two-thirds (77.38%) of admitted neonates in the referral hospitals in Sana’a city in Yemen. EOS was more common than LOS and B. cepacia emerged as the predominant causative organism of both EOS and LOS. Majority of the isolated pathogens were resistant to commonly used antibiotics.

Culture confirmed sepsis was high in our study. However, the proportion of culture-confirmed neonatal sepsis varied between studies from developing countries; 62.8% in Pakistan [21], 57% in Yemen [22], 45.9% in Egypt [23], 44.7% in Ethiopia [24], 24% in Tanzania [25] and 12.6% in Nepal [26]. The differences in the proportion of neonatal sepsis between countries may be due to several factors including sample size and the different used techniques.

In this study, EOS was about two times higher than LOS, which is consistent with other reports from developing countries [22, 23, 26, 27]. However, it is inconsistent with reports from developed countries where LOS is the predominant type of neonatal sepsis [28, 29]. The predominance of EOS in developing countries can be attributed to low quality health services and poor hygiene. This is mainly due to illiteracy, ignorance, cultural beliefs, and prejudices [19]. Infection may be of the maternal genital tract or from delivery rooms or neonatal units [19, 30].

Similar to previous studies neonates born by vaginal delivery were at a higher risk of neonatal sepsis compared with those delivered through Cesarean section [23, 27]. Further, culture confirmed sepsis was high (89.9%) among home delivered neonates. Conversely, majority (75.3%) of the hospital delivered neonates had culture confirmed sepsis. These results emphasize on both the vertical and nosocomial transmission of the causative pathogens.

In this study, gram-negative bacteria were the most common cause of EOS and LOS, which is consistent with previous reports from developing countries [8, 9, 22, 31]. Unexpectedly, B. cepacia emerged as the most common cause of neonatal sepsis. It was found in all neonatal units. Moreover, it was resistant to aminoglycosides, fluoroquinolones and imipenem. B. cepacia has been reported to cause multiple hospital outbreaks and significant neonatal septicemia in different countries [12,13,14,15,16]. Also, it has been isolated from intravenous solutions, mouthwash, disinfectant and medical devices [31,32,33]. This organism is often overlooked and reported as Pseudomonas species [33, 34]. To our knowledge, this is the first report of B. cepacia from Yemen.

Staphylococcus haemolyticus was the most frequently isolated CONS in this study. Most isolated S. haemolyticus showed variable degrees of antibiotic resistance, which is the nature of S. haemolyticus to acquire antibiotic resistance due to unusual genome plasticity [35]. So, this organism has a great ability to survive in the hospital environment, especially on medical devices.

Our results of antimicrobial resistance profile are consistent with other findings. Though some of the previous reports were based on cultures from different kinds of medical specimens and performed by conventional methods [8, 24, 28, 36,37,38,39]. Most of the isolated gram-negative and gram-positive pathogens were resistant to commonly used antibiotics, penicillins, cephalosporins and carbapenems. Increased antimicrobial resistance in developing countries is due to multiple factors including poverty, self-medication, unregulated supply and drug smuggling, misguided practice and inappropriate prescriptions [40, 41]. Such factors may provoke changes in causative agents together with their change in antibiotic susceptibility patterns [40, 41]. Markedly, majority of neonates in this study received antibiotics before sampling. The presence of ESBL and carbapenemase-positive gram-negative bacteria is an alarming sign both locally and globally and increases the burden of neonatal sepsis in Yemen.

Proven sepsis was associated with elevated CRP. Elevated CRP indicates activation of the immune system and is commonly used as an indicator of bacterial sepsis [18, 19]. The variation in the total white cell counts and platelet counts is considered a hematological response to inflammation, but there was no association between the culture-positive and culture-negative groups regarding white cell or platelets counts. This may be explained by considering evolving neonatal immune system [18, 19].


Culture-positive neonatal sepsis is high in Sana’a city with EOS representing two-thirds of the cases. B. cepacia followed by K. oxytoca and S. haemolyticus were the most common causes of both EOS and LOS. Majority of the isolated bacterial pathogens showed a high level of resistance to commonly used antibiotics. Vaginal delivery held high risk for developing neonatal sepsis. The study results emphasize the emergence of multidrug-resistant bacteria in the NICUs and might serve as a baseline for proper medical treatment of neonatal sepsis in Sana’a city.

Availability of data and materials

The datasets used and analyzed during the current study are available from the corresponding author on reasonable request.



C-reactive protein


Extended-Spectrum β-lactamase


Early-onset sepsis


Late-onset sepsis


  1. DALYs GBD, Collaborators H. Global, regional, and national disability-adjusted life-years (DALYs) for 359 diseases and injuries and healthy life expectancy (HALE) for 195 countries and territories, 1990–2017: a systematic analysis for the Global Burden of Disease Study 2017. Lancet. 2018;392(10159):1859–922.

    Article  Google Scholar 

  2. Simonsen KA, Anderson-Berry AL, Delair SF, Davies HD. Early-onset neonatal sepsis. Clin Microbiol Rev. 2014;27(1):21–47.

    Article  Google Scholar 

  3. Kristóf K, Kocsis E, Nagy K. Clinical microbiology of early-onset and late-onset neonatal sepsis, particularly among preterm babies. Acta Microbiol Immunol Hung. 2009;56(1):21–51.

    Article  Google Scholar 

  4. Dong Y, Speer CP. Late-onset neonatal sepsis: recent developments. Arch Dis Child Fetal Neonatal Ed. 2015;100(3):F257-263.

    Article  Google Scholar 

  5. Afonso EDP, Blot S. Effect of gestational age on the epidemiology of late-onset sepsis in neonatal intensive care units—a review. Expert Rev Anti Infect Ther. 2017;15(10):917–24.

    Article  CAS  Google Scholar 

  6. You T, Zhang H, Guo L, Ling K-R, Hu X-Y, Li L-Q. Differences in clinical characteristics of early- and late-onset neonatal sepsis caused by Klebsiella pneumoniae. Int J Immunopathol Pharmacol. 2020;34:2058738420950586.

    Article  CAS  Google Scholar 

  7. Shane AL, Sánchez PJ, Stoll BJ. Neonatal sepsis. Lancet. 2017;390(10104):1770–80.

    Article  Google Scholar 

  8. Downie L, Armiento R, Subhi R, Kelly J, Clifford V, Duke T. Community-acquired neonatal and infant sepsis in developing countries: efficacy of WHO’s currently recommended antibiotics–systematic review and meta-analysis. Arch Dis Child. 2013;98(2):146–54.

    Article  Google Scholar 

  9. Sgro M, Campbell DM, Mellor KL, Hollamby K, Bodani J, Shah PS. Early-onset neonatal sepsis: organism patterns between 2009 and 2014. Paediatr Child Health. 2020;25(7):425–31.

    Article  Google Scholar 

  10. Singhal T, Shah S, Naik R. Outbreak of Burkholderia cepacia complex bacteremia in a chemotherapy day care unit due to intrinsic contamination of an antiemetic drug. Indian J Med Microbiol. 2015;33(1):117–9.

    Article  CAS  Google Scholar 

  11. Glowicz J, Crist M, Gould C, Moulton-Meissner H, Noble-Wang J, de Man TJB, et al. A multistate investigation of health care-associated Burkholderia cepacia complex infections related to liquid docusate sodium contamination, January–October 2016. Am J Infect Control. 2018;46(6):649–55.

    Article  PubMed  PubMed Central  Google Scholar 

  12. Mali S, Dash L, Gautam V, Shastri J, Kumar S. An outbreak of Burkholderia cepacia complex in the paediatric unit of a tertiary care hospital. Indian J Med Microbiol. 2017;35(2):216–20.

    Article  Google Scholar 

  13. Antony B, Cherian EV, Boloor R, Shenoy KV. A sporadic outbreak of Burkholderia cepacia complex bacteremia in pediatric intensive care unit of a tertiary care hospital in coastal Karnataka, South India. Indian J Pathol Microbiol. 2016;59(2):197–9.

    Article  Google Scholar 

  14. Sundaram V, Kumar P, Dutta S, Mukhopadhyay K, Ray P, Gautam V, et al. Blood culture confirmed bacterial sepsis in neonates in a North Indian tertiary care center: changes over the last decade. Jpn J Infect Dis. 2009;62(1):46–50.

    PubMed  Google Scholar 

  15. Bharara T, Chakravarti A, Sharma M, Agarwal P. Investigation of Burkholderia cepacia complex bacteremia outbreak in a neonatal intensive care unit: a case series. J Med Case Rep. 2020;14(1):76.

    Article  PubMed  PubMed Central  Google Scholar 

  16. Yonas E, Damay V, Pranata R, Nusarintowati N. Infective endocarditis due to Burkholderia cepacia in a neonate: a case report. J Med Case Rep. 2018;12(1):120.

    Article  PubMed  PubMed Central  Google Scholar 

  17. Qirbi N, Ismail SA. Health system functionality in a low-income country in the midst of conflict: the case of Yemen. Health Policy Plan. 2017;32(6):911–22.

    Article  PubMed  Google Scholar 

  18. Kliegman RM, Stanton BF, St. Geme JW, Nina F. Nelson text book of pediatrics. In: Lielgman RM, Behrman RE, Jenson H, Staton B, editors. Sepsis septic shock and systemic inflammatory response syndrome. 20th ed. Philadelphia: Elseiver; 2016. p. 1094.

    Google Scholar 

  19. Zea-Vera A, Ochoa TJ. Challenges in the diagnosis and management of neonatal sepsis. J Trop Pediatr. 2015;61(1):1–13.

    Article  PubMed  PubMed Central  Google Scholar 

  20. Isenbergh HD. Clinical microbiology procedures handbook. 2nd ed. Washington: ASM Press; 2004.

    Google Scholar 

  21. Rahman S, Hameed A, Roghani MT, Ullah Z. Multidrug resistant neonatal sepsis in Peshawar, Pakistan. Arch Dis Child Fetal Neonatal Ed. 2002;87(1):F52-54.

    Article  CAS  Google Scholar 

  22. Al-Shamahy HA, Sabrah AA, Al-Robasi AB, Naser SM. Types of bacteria associated with neonatal sepsis in Al-Thawra University Hospital, Sana’a, Yemen, and their antimicrobial profile. Sultan Qaboos Univ Med J. 2012;12(1):48–54.

    Article  Google Scholar 

  23. Shehab El-Din EMR, El-Sokkary MMA, Bassiouny MR, Hassan R. Epidemiology of neonatal sepsis and implicated pathogens: a study from Egypt. Biomed Res Int. 2015;2015:509484.

    Article  Google Scholar 

  24. Shitaye D, Asrat D, Woldeamanuel Y, Worku B. Risk factors and etiology of neonatal sepsis in Tikur Anbessa University Hospital, Ethiopia. Ethiop Med J. 2010;48(1):11–21.

    PubMed  Google Scholar 

  25. Mhada TV, Fredrick F, Matee MI, Massawe A. Neonatal sepsis at Muhimbili National Hospital, Dar es Salaam, Tanzania; aetiology, antimicrobial sensitivity pattern and clinical outcome. BMC Public Health. 2012;12:904.

    Article  Google Scholar 

  26. Ansari S, Nepal HP, Gautam R, Shrestha S, Neopane P, Chapagain ML. Neonatal septicemia in Nepal: early-onset versus late-onset. Int J Pediatr. 2015;2015:379806.

    Article  PubMed  PubMed Central  Google Scholar 

  27. Kamath S, Mallaya S, Shenoy S. Nosocomial infections in neonatal intensive care units: profile, risk factor assessment and antibiogram. Indian J Pediatr. 2010;77(1):37–9.

    Article  Google Scholar 

  28. Vergnano S, Menson E, Kennea N, Embleton N, Russell AB, Watts T, et al. Neonatal infections in England: the NeonIN surveillance network. Arch Dis Child Fetal Neonatal Ed. 2011;96(1):F9-14.

    Article  Google Scholar 

  29. Stoll BJ, Hansen NI, Sánchez PJ, Faix RG, Poindexter BB, Van Meurs KP, et al. Early onset neonatal sepsis: the burden of group B Streptococcal and E. coli disease continues. Pediatrics. 2011;127(5):817–26.

    Article  Google Scholar 

  30. Zaidi AKM, Thaver D, Ali SA, Khan TA. Pathogens associated with sepsis in newborns and young infants in developing countries. Pediatr Infect Dis J. 2009;28(1 Suppl):S10-18.

    Article  Google Scholar 

  31. Dizbay M, Tunccan OG, Sezer BE, Aktas F, Arman D. Nosocomial Burkholderia cepacia infections in a Turkish university hospital: a five-year surveillance. J Infect Dev Ctries. 2009;3(4):273–7.

    CAS  PubMed  Google Scholar 

  32. Doit C, Loukil C, Simon A-M, Ferroni A, Fontan J-E, Bonacorsi S, et al. Outbreak of Burkholderia cepacia bacteremia in a pediatric hospital due to contamination of lipid emulsion stoppers. J Clin Microbiol. 2004;42(5):2227–30.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  33. Sousa SA, Ramos CG, Leitão JH. Burkholderia cepacia complex: emerging multihost pathogens equipped with a wide range of virulence factors and determinants. Int J Microbiol. 2011.

    Article  PubMed  Google Scholar 

  34. Devanga Ragupathi NK, Veeraraghavan B. Accurate identification and epidemiological characterization of Burkholderia cepacia complex: an update. Ann Clin Microbiol Antimicrob. 2019;18(1):7.

    Article  PubMed  PubMed Central  Google Scholar 

  35. Czekaj T, Ciszewski M, Szewczyk EM. Staphylococcus haemolyticus—an emerging threat in the twilight of the antibiotics age. Microbiology (Reading). 2015;161(11):2061–8.

    Article  CAS  Google Scholar 

  36. Badulla WFS, Alshakka M, Mohamed Ibrahim MI. Antimicrobial resistance profiles for different isolates in Aden, Yemen: a cross-sectional study in a resource-poor setting. Biomed Res Int. 2020;2020:1810290.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  37. Dagnew M, Yismaw G, Gizachew M, Gadisa A, Abebe T, Tadesse T, et al. Bacterial profile and antimicrobial susceptibility pattern in septicemia suspected patients attending Gondar University Hospital, Northwest Ethiopia. BMC Res Notes. 2013;6:283.

    Article  Google Scholar 

  38. Awad HA, Mohamed MH, Badran NF, Mohsen M, Abd-Elrhman A-SA. Multidrug-resistant organisms in neonatal sepsis in two tertiary neonatal ICUs, Egypt. J Egypt Public Health Assoc. 2016;91(1):31–8.

    Article  Google Scholar 

  39. Viswanathan R, Singh AK, Basu S, Chatterjee S, Sardar S, Isaacs D. Multi-drug resistant gram negative bacilli causing early neonatal sepsis in India. Arch Dis Child Fetal Neonatal Ed. 2012;97(3):F182-187.

    Article  Google Scholar 

  40. Chokshi A, Sifri Z, Cennimo D, Horng H. Global contributors to antibiotic resistance. J Glob Infect Dis. 2019;11(1):36–42.

    Article  PubMed  PubMed Central  Google Scholar 

  41. Ayukekbong JA, Ntemgwa M, Atabe AN. The threat of antimicrobial resistance in developing countries: causes and control strategies. Antimicrob Resist Infect Control. 2017;6:47.

    Article  PubMed  PubMed Central  Google Scholar 

Download references


The authors express their deepest gratitude to the administrative and staff members of the Al-Kuwait, C-Plas, Al-Gumhory, Al-Sabeen, Family, and AL-Thawra hospitals, especially those who work in the NICU for their participation and support for the success of this study. Special thanks are also due to Dr.Ahlam Esmail of the AL-Thawra hospital and Dr. Hana Sabbar of Al-Gumhory Hospital, Sana’a, Yemen, for their help in collecting specimens.


This study received financial support from the WHO/EMRO Grant Scheme for Research in Priority Areas of Public Health (RPPH-18-8).

Author information

Authors and Affiliations



AS and IA: study design, data acquisition and analysis, interpretation of data and manuscript preparation. AH: patient enrollment, data acquisition, analysis and interpretation of data. AlA and AbA: patient enrollment, acquisition, analysis and interpretation of patient data. WF and DS: study design, LC–MS experiments and analysis. OA, TA, FA: patient enrollment and acquisition of data. AbA: patient enrollment and data analysis. MM: data analysis, critically revised the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Adeeb Salah.

Ethics declarations

Ethics approval and consent to participate

The study protocol was approved by the Research and Ethics Committee of the Faculty of Medicine and Health Sciences, University of Science and Technology, Sana’a, Yemen (Approval No. EAU/UST122). Written informed consent was obtained from guardian of all children after explaining the study objectives.

Consent for publication

Not applicable.

Competing interests

The authors declare no competing interests.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit The Creative Commons Public Domain Dedication waiver ( applies to the data made available in this article, unless otherwise stated in a credit line to the data.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Salah, A., Al-Subol, I., Hudna, A. et al. Neonatal sepsis in Sana’a city, Yemen: a predominance of Burkholderia cepacia. BMC Infect Dis 21, 1108 (2021).

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: