Felix Pius Omullo

Dr. Felix Pius Omullo

Aspire Leaders Program, Harvard University, Cambridge, Maryland, USA
orcid

Research Focus & Metrics

Academic Career Length

3Years (2024-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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21 December 2025 in International Journal of Rheumatic Diseases
Verified
Journal Article
Closed access
Gudisa Bereda BeredaGudisa Bereda Bereda
Gudisa Bereda Bereda
Felix Pius OmulloFelix Pius Omullo
Felix Pius Omullo

16 October 2025 in World Journal of Clinical Cases
Verified
Journal Article
Open access
Felix Pius OmulloFelix Pius Omullo
Felix Pius Omullo
OAOdenyo Stella Anyango
Odenyo Stella Anyango
BMBenard Munyao Mutua
Benard Munyao Mutua
MOMike Onyango Odoyo
Mike Onyango Odoyo
HGHarambee Moses Gogo
Harambee Moses Gogo
VOVictor Omondi Obung'A
Victor Omondi Obung'A
BACKGROUND Intestinal obstruction (IO) in pregnancy, though rare (1:1500-1:66000), carries high maternal (6%-10%) and fetal mortality (26%). Adhesions from prior surgery are the leading cause. Diagnosis is often delayed due to symptom overlap with normal pregnancy, increasing risks of perforation and sepsis. CASE SUMMARY A 25-year-old gravida 2 para 1 woman at 28 weeks of gestation presented with 1-week constipation, feculent vomiting, and abdominal distension. She had a history of exploratory laparotomy in 2015 for blunt abdominal trauma. The diagnosis of IO in pregnancy was confirmed via abdominopelvic ultrasound and clinical findings. Interventions included conservative measures (nasogastric tube decompression, enemas) followed by emergency laparotomy with bowel resection/anastomosis. Despite surgical management, the patient succumbed to septic shock. CONCLUSION High clinical suspicion, expedited cross-sectional imaging (computed tomography/Magnetic resonance imaging), and emergent surgery are critical to reduce mortality.

27 May 2026 in Malaria Journal
Verified
Journal Article
Open access
KNKhulud Nurani
Khulud Nurani
NKNajib Kadernani
Najib Kadernani
EKEmmanuel Korir
Emmanuel Korir
MEMerna Akram Estreed
Merna Akram Estreed
ADArkadeep Dhali
Arkadeep Dhali
Moses Muia MasikaMoses Muia Masika
Moses Muia Masika
Background: Malaria remains a major public health burden in Africa, particularly among children under five years of age. By consolidating findings across randomized controlled trials on the RTS,S and R21 malaria vaccines, this study seeks to provide an evidence based guide. Methods: We conducted a systematic review and meta-analysis of studies of randomized controlled trials evaluating the RTS,S and R21 malaria vaccines in African children under five. Data sources included PubMed, Scopus, and Embase. Primary outcomes were the vaccine efficacies against first/only episodes of malaria, multiple episodes and severe malaria; and the incidence of severe adverse events following vaccination. Pooled effect estimates were calculated using random-effects models. Results: Eleven studies enrolling 27,178 participants (RTS,S: 21,589; R21: 5589) were included. For RTS,S, pooled efficacy against first clinical malaria episode was 32% (HR 0.68, 95% CI 0.61–0.76; I 2 = 0%), against multiple episodes was 29% (IRR 0.71, 95% CI 0.55–0.91; I 2 = 11.3%), and against severe malaria was 17–22% (RR 0.78–0.83). The R21 vaccine demonstrated 68% efficacy against first episodes (HR 0.32, 95% CI 0.26–0.39) and 67% against multiple episodes (IRR 0.33, 95% CI 0.27–0.41) in a single phase 3 trial. Pooled SAE incidence was 11.2% (95% CI 6.6–18.6%; I 2 = 96.2%) for RTS,S and 3% (95% CI 1–6%; I 2 = 80.6%) for R21, with no vaccine-attributable deaths. Both vaccines showed acceptable reactogenicity profiles. Conclusion: Both RTS,S and R21 vaccines demonstrate protective efficacy against clinical malaria in African children under five, with R21 showing higher efficacy in initial trials. RTS,S provides moderate, reproducible protection in clinical trials. Both vaccines have acceptable safety profiles, though continued pharmacovigilance is essential.

30 January 2025
Verified
Journal Article
Closed access
Felix Pius OmulloFelix Pius Omullo
Felix Pius Omullo
MPMagdalene Parsimei
Magdalene Parsimei
TKThomas Kithenge
Thomas Kithenge
ZHZamzam Hassan
Zamzam Hassan

29 December 2024
Verified
Journal Article
Closed access
Felix Pius OmulloFelix Pius Omullo
Felix Pius Omullo
TKThomas Kimanzi Kitheghe
Thomas Kimanzi Kitheghe
WKWambugu Charles Kanyi
Wambugu Charles Kanyi
BMBrian Kithuka Mutuku
Brian Kithuka Mutuku
GWGithinji Jackline Wanjiku
Githinji Jackline Wanjiku

29 December 2024
Verified
Journal Article
Closed access
Felix Pius OmulloFelix Pius Omullo
Felix Pius Omullo
ANAllan Kariuki Ng’ang’a
Allan Kariuki Ng’ang’a
POPatrick Osiri
Patrick Osiri
ANAllan Njoroge
Allan Njoroge
TKThomas Kimanzi Kitheghe
Thomas Kimanzi Kitheghe