1.Detection of a Serratia sarumanii outbreak in neonatal intensive care units using SaTScan and whole genome sequencing, Philippines, 2022
Giselle V Godin ; Sonia B Sia ; Ferissa B Ablola ; June M Gayeta ; Marietta L Lagrada ; Polle Krystle V Macaranas ; Agnettah M Olorosa ; Janziel Fiel Palarca ; Manuel C Jamoralin, Jr ; June Janice Borlasa ; Ma Fe Laren B Gacho ; Rica Marie B Andico ; Ida Marrione Q Arriola ; Jo-Anne J Lobo ; Melanie B Adolfo ; Jessica Anne A Dumalag ; Joel T Gallardo ; Ma Delta S Aguilar ; Allyne M Aguelo ; Charlotte V Bañ ; es ; Genelynne J Beley
Western Pacific Surveillance and Response 2026;17(1):13-21
Objective: This study aimed to demonstrate the benefits of using SaTScan (Boston, MA, USA), a cluster-detection software programme, and whole genome sequencing to investigate a suspected outbreak of Serratia marcescens infections in a tertiary government hospital in the southern Philippines. The hospital is part of the national Antimicrobial Resistance Surveillance Program’s network of sentinel sites.
Methods: The investigation followed national outbreak investigation protocols. In May 2022, when evaluation of daily hospital laboratory census data revealed an increase in the number of Serratia species in the hospital, an alert was triggered. A concurrent, routine SaTScan analysis of the hospital’s surveillance data by the Antimicrobial Resistance Surveillance Reference Laboratory confirmed a cluster of cases. The Reference Laboratory requested isolates from clinical specimens from the hospital for confirmation of bacterial identification, antimicrobial susceptibility testing and whole genome sequencing.
Results: Six isolates were submitted for genomic analysis, two of which were from the identified cluster. Although originally identified as S. marcescens, five of the isolates were subsequently confirmed as S. sarumanii. Phylogenetic analysis showed that the two isolates from the cluster were closely related and belonged to the same clade, which may suggest a common source. Three antimicrobial resistance genes were identified, but their phenotypic expression was limited, with one isolate exhibiting resistance mechanisms.
Discussion: This study highlighted the utility of SaTScan for the early detection of potential disease outbreaks. The use of whole genome sequencing enhanced the investigation by enabling the analysis of potential transmission pathways at the genetic level, identification of the outbreak source and the detection of novel species.
2.Screening and management of bladder and bowel dysfunction among toilet trained children in a general pediatric outpatient clinic of a Tertiary Hospital using standard urotherapy: Prospective interventional study.
Melanie O. UY MATIAO ; Maria Rosario F. CABANSAG ; Remedios D. CHAN ; Maria Margarita M. ROMANO ; Jemely M. PUNZALAN ; Dennis FLORES ; David C T. BOLONG
Journal of Medicine University of Santo Tomas 2026;10(1):1862-1872
OBJECTIVES
This study determined the prevalence of BBD among toilet-trained children attending a tertiary hospital’s pediatric outpatient clinic, and to evaluate the effectiveness of standard urotherapy among affected children.
METHODSA prospective interventional study was conducted among 144 toilet-trained children aged 7 to 12 years seen at the University of Santo Tomas Hospital outpatient clinic from August 2025 to September 2025. Sociodemographic data were collected, and BBD was screened using the validated Filipino version of the Dysfunctional Voiding Symptom Scores (DVSS) questionnaire. Children with BBD underwent standard urotherapy, which included behavioral and lifestyle interventions such as timed voiding, adequate hydration, constipation management and proper voiding posture. DVSS assessments were repeated at two and four weeks.
RESULTSThe overall prevalence of BBD was 22.9% (33 of 144). BBD was significantly more prevalent among females (31.88%) than males (14.67%) (adjusted OR = 2.96, 95% CI: 1.28–6.86; p = 0.011). At baseline, children with BBD had significantly higher mean total DVSS scores (9.15 ± 3.64) compared to those without (2.01 ± 1.80, pCONCLUSION
Standard urotherapy proved effective in reducing symptom scores within two weeks and resulted in complete clinical resolution after four weeks among those who continued therapy. Routine screenings for BBD using DVSS and early initiation of standard urotherapy in pediatric outpatient settings are recommended to prevent complications and improve children’s urinary and bowel health.
Human ; Child: 6-12 Yrs Old ; World Health Organization ; Outpatient Clinics, Hospital ; Mass Screening ; Tertiary Care Centers ; Constipation ; Ambulatory Care Facilities
3.Infection control practices of dentists in an urbanized city in the Philippines during the COVID-19 pandemic within the period of general community quarantine.
Ma. Chrizel Iana A. MADLANGBAYAN ; Joshua Marcel A. SY ; Melanie Ruth M. KARGANILLA
Acta Medica Philippina 2026;60(9):80-90
BACKGROUND
The global impact of the COVID-19 pandemic has instigated a profound public health crisis, particularly affecting professionals like dentists who, due to their close interaction with saliva—a potential viral reservoir—and the aerosols generated during specific procedures, face elevated risks of infection. To mitigate this, the Centers for Disease Control and Prevention (CDC) and the Philippine Dental Association (PDA) have established guidelines for averting cross-infection in dental settings.
OBJECTIVEThis study, conducted in an urbanized Metro Manila City, delves into the infection control practices of dentists amid the pandemic.
METHODSDentists from a Metro Manila city dental chapter were invited to participate in an online survey (Google Forms) consisting of participants' demographics, patient triage, engineering, administrative controls, disinfection personal hygiene, personal protective equipment (PPE), and waste management practices. Descriptive statistics, employing frequency distributions and percentages, summarized the dentists' adherence to infection control protocols.
RESULTSOut of forty-nine respondents (49), the majority (92%) provided their teams' orientation on COVID-19 infection control protocols before reopening. Notably, 57% deferred elective procedures and 43% postponed aerosolgenerating procedures (AGPs). Only 39% utilized rubber dam isolation during AGPs. Most respondents reported full implementation of recommended administrative controls during the pandemic, with 92% isolating their treatment areas from other parts of the clinic. Most respondents adopted high-efficiency particulate air (HEPA) filtration units (82%) as one of their clinic’s engineering controls, and an extraoral vacuum machine, accounting for 71% of the respondents. The most common disinfection product used by the participants was alcohol, which was at 94%. Additionally, over 90% adhered to all recommended hand hygiene practices for both dental staff and patients. For the waste management protocols, only 55% of the respondents have their infectious waste collected by third-party Treatment Storage and Disposal (TSD) facilities.
CONCLUSIONThe data shows that with the guidelines posted by both the PDA and CDC, the city’s dental practitioners could still provide services to the community in the safest manner at the time by being updated and following the infection control practices suggested by both organizations. Although some areas could have been improved, such as third-party waste management and the utilization of RT-PCR testing, some of these problems could have been attributed to the lack of availability in their areas.
Human ; Male ; Female ; Adult: 25-44 Yrs Old ; Middle Aged: 45-64 Yrs Old ; Aged: 65-79 Yrs Old ; World Health Organization ; Residence Characteristics ; Quarantine ; Public Health ; Centers For Disease Control And Prevention (u.s.) ; Covid-19 ; Centers For Disease Control And Prevention, U.s.
4.Folliculotropic mycosis fungoides presenting with secondary cutis verticis gyrata in a Filipino male.
Karen Andrea D. CADACIO ; Melanie Joy D. RUIZ ; Daisy KING-ISMAEL
Journal of the Philippine Medical Association 2025;104(1):25-29
Mycosis fungoides (MF) is the predominant type of primary cutaneous lymphoma, accounting for at least 40%. It usually occurs in middle to late adulthood with the average age of diagnosis between 55 and 60 years. Folliculotropic MF is a variant that clinically presents with patches, plaques, and unusual hair loss within lesions. It predominantly involves the head and neck region. This usually presents with intense pruritus and commonly with secondary bacterial infection. Cutis verticis gyrata is a rare skin condition characterized by thickening and folding of the scalp, resulting in a furrowed or ridged appearance, and rarely associated with mycosis fungoides. A 46-year-old male, Filipino, presented with a 1-year history of generalized follicular papules, erythematous plaques, and subsequently presented with cutis verticis gyrata. Histopathological examination revealed findings consistent with folliculotropic MF. This was further confirmed by CD3, CD4, CD5 which revealed strongly positive immunohistochemical staining. To the best of our knowledge, there is currently only one published case of folliculotropic MF that presented with cutis verticis gyrata and only four cases of cutis verticis gyrata published locally.
Human ; Male ; Middle Aged: 45-64 Yrs Old ; Mycosis Fungoides
5.Review of Cytogenetic findings of patients with turner syndrome and its variants in Filipinos and the implications in genetic counseling.
Ebner Bon Gatus MACEDA ; Michelle Espinoza ABADINGO ; Cheryll MAGBANUA-CALALO ; Edsel Allan G. SALONGA ; Jonathan Z. OBLEFIAS ; Maria Melanie Liberty Bandagosa ALCAUSIN
Philippine Journal of Health Research and Development 2025;29(4):72-77
BACKGROUND
Turner syndrome (TS) is the most common sex chromosomal abnormality in females resulting from a missing X chromosomal material. This in turn results in a range of clinical manifestations. This study aimed to provide the data on the cases of TS confirmed via chromosomal analysis in a cytogenetics laboratory in the Philippines as well as the role of genetic counseling.
METHODOLOGYA review of the karyotyping results of the Cytogenetics Laboratory, Institute of Human Genetics, National Institutes of Health, University of the Philippine Manila from 1991 to 2020.
RESULTSTS accounted for 2.64% of all the samples received from 1991 to 2020. For 30 years, the most common karyotype in TS was the classical TS or the standard monosomy 45, X noted in 195 patients or 37.69% of all patients diagnosed with TS. Mosaicism with a normal female karyotype was noted in 50 patients (9.62%). For the TS variants, the most common is isochromosome Xq seen in 125 patients (24.04%). This is followed by TS with marker chromosome in 55 patients (10.58%) and ring X chromosome in 23 patients (4.42%). Deletion Xp and deletion Xq were noted in 22 patients (4.23%) and 20 patients (3.85%), respectively.
CONCLUSIONFrom this study, it can be noted that chromosomal analysis or standard karyotyping is a vital and useful diagnostic tool in TS. The information obtained from it may be useful in clinical decision-making of families and healthcare providers. Its importance in providing adequate genetic counseling cannot be overemphasized.
Human ; Chromosomes ; Karyotyping ; Turner Syndrome
6.Efficacy of Pressure Cooker Technique in Redo Embolization for High-Flow Torcular Dural Sinus Malformation
Frank Gleb SOLIS CHUCOS ; Rosa Lizbeth ECOS QUISPE ; Mauro TOLEDO ; Melanie WALKER ; René CHAPOT
Neurointervention 2025;20(1):32-36
Torcular dural sinus malformations (tDSMs) with high-flow fistulas pose complex management challenges due to their vascularity and the delicate neuroanatomy involved. This report presents the case of a child with tDSM and hydrocephalus, who underwent 3 staged embolization procedures but required a redo intervention due to residual malformation and venous hypertension. Utilizing the pressure cooker technique (PCT) in a redo setting allowed for high-pressure, targeted embolic delivery with minimized reflux, achieving near-complete occlusion and significant symptom relief. This case highlights PCT’s potential to improve outcomes in multi-stage treatments of high-flow tDSM, reducing reflux and enhancing safety in technically demanding cases.
8.The accuracy of the Beck's Depression Inventory Scale (BDI-Visayan) as a screening tool for major depressive disorder in end stage renal disease patients at a tertiary hospital in Mandaue City, Cebu, Philippines
Miguel T. Lucero IV ; Melanie Gail H. Dy ; Frederick P. Tampus
Philippine Journal of Internal Medicine 2025;63(2):114-121
BACKGROUND
End-stage renal disease (ESRD) has been increasing in prevalence in recent years. The true prevalence of depression in hemodialysis patients is still not known. Cross-cultural studies showed prevalence ranging from 20-90%. Dimaano translated the Beck’s Depression Inventory Scale into the Visayan language and used this as a screening tool for depression among hemodialysis patients - and this was the first cross-cultural translation of the Beck’s Depression Inventory Scale to the Visayan language (BDI-Visayan).
GENERAL OBJECTIVEDetermine the accuracy of Beck’s Depression Inventory - Visayan in screening for Major Depressive Disorder (MDD) among Visayan-speaking ESRD patients.
STUDY DESIGNCross-sectional survey
STUDY POPULATION AND SETTINGAdult Visayan-speaking patients, ≥ 18 years old with ESRD, with GFR < 15 ml/min/1.73 m2 and ongoing hemodialysis for at least 3 months at the Chong Hua Hospital Mandaue Renal Unit.
METHODOLOGYThe 73 subjects underwent both the BDI-Visayan and the Structured Clinical Interview for DSM Disorders. Data was gathered to determine the accuracy of the BDI-Visayan in detecting Major Depressive Disorder.
RESULTSOf the 73 subjects, 19.2% were identified with MDD, based on the SCID, while 37.0% were identified as depressed using the BDI-Visayan. Analyzed data showed that the accuracy of BDI-Visayan to detect MDD was 67.75%, with a sensitivity of 57.14%, and specificity of 67.8%.
CONCLUSIONBDI-Visayan had an acceptable accuracy in screening for MDD, however, it may tend to have an overdiagnosis in the ESRD population – emphasizing its role as a screening tool for suspected MDD cases.
Human ; Depression ; Dialysis ; Screening
9.Clinical outcome of patients with osteogenesis imperfecta on intravenous pamidronate treatment at the Philippine General Hospital from 2010-2018.
Cheryll MAGBANUA-CALALO ; Ebner Bon G. MACEDA ; Maria Melanie Liberty B. ALCAUSIN
Acta Medica Philippina 2025;59(17):69-75
BACKGROUND
Osteogenesis imperfecta (OI) is a group of connective tissue disease characterized by propensity to fractures following minimal trauma. OI is a lifelong inheritable disease and currently has no definitive cure. Management goals are directed towards prevention of fractures, controlling the symptoms, maximizing independent mobility, and developing optimal bone mass and muscle strength. Bisphosphonates are the mainstay of pharmacologic fracture-prevention therapy for most forms of OI. The University of the Philippines-Philippine General Hospital Bisphosphonate Treatment Program for OI was started in 2006 by the Clinical Genetics Service. For more than a decade now, the program has been serving more than 50 OI patients. This study evaluated the clinical outcomes of the patients who were included in the program to add to the body of knowledge on Filipino patients with OI.
OBJECTIVESThis study sought to determine the clinical outcomes of children with OI on intravenous pamidronate treatment at the Philippine General Hospital (PGH) from January 2010 to December 2018.
METHODSThe study utilized a retrospective review of medical records of 24 patients diagnosed with OI on pamidronate therapy seen at the PGH from January 2010 to December 2018. Descriptive statistics were used to summarize the demographic and baseline clinical characteristics of the patients. Median annualized fracture rates before and during treatment were calculated and compared. The patient functional mobility before and during pamidronate infusion was classified accordingly based on the Gross Motor Function Classification System (GMFCS) and were compared.
RESULTSTwenty-four patients, which include seven males and 17 females, with ages at the time of conduct of the study ranging from four years to 11 years, fulfilled the inclusion criteria. There were four patients with OI type I, six with OI type III, 11 with OI type IV and three with OI type V. The annualized long bone fracture rate decreased significantly from a median of 2.0/year (range 1-2.75) to 0.75/year (range 0-1) after more than a year on pamidronate infusion (pCONCLUSION
Cyclic intravenous pamidronate treatment in young children with moderate-severe OI is well tolerated and associated with reduced fracture frequency with a tendency to improvement of gross functional mobility.
Human ; Osteogenesis Imperfecta ; Bisphosphonate ; Diphosphonates
10.The efficacy of photodynamic therapy against Streptococcus mutans biofilm on orthodontic brackets: An in-vitro study.
Maria Angelica Bagadiong BARRAMEDA ; Melanie Ruth M. KARGANILLA ; Josievitz U. TAN-ZAFRA
Acta Medica Philippina 2025;59(15):77-87
BACKGROUND AND OBJECTIVE
Orthodontic brackets predispose dental biofilm accumulation causing caries and gingivitis. Chlorhexidine is an adjunct to mechanical plaque removal, but has side-effects (tooth staining, bacterial resistance) due to long term use. This study tested the efficacy of Photodynamic Therapy, which produces reactive oxygen species, to reduce Streptococcus mutans in dental biofilm on orthodontic brackets.
METHODSA 5-day S. mutans biofilm was grown on forty enamel-bracket specimens. Thirty-nine specimens were randomized to three treatment groups: A. Distilled Water; B. 0.12% Chlorhexidine (CHX); C. Photodynamic Therapy (PDT) using Toluidine Blue O (TBO) as a photosensitizer, activated by red LED (630nm). After treatment, one random specimen from each group was viewed under Environmental Scanning Electron Microscopy (ESEM); the other 12 specimens, biofilms were collected, weighed, and cultured onto BHI agar plates to determine the number of CFU/mg. For baseline evaluation, one clean and one untreated specimens were preserved for ESEM.
RESULTSBased on Tukey HSD test, group A had the most S. mutans (37.0573 CFU/mg) and was significantly different (pCONCLUSION
Both Photodynamic Therapy and 0.12% Chlorhexidine showed a significant reduction of S. mutans in dental biofilm on orthodontic brackets. However, there is no significant difference between them in reducing S. mutans CFU/mg. Photodynamic therapy could be an alternative adjunctive tool to mechanical removal of plaque adhered to orthodontic brackets.
Bacteria ; Photochemotherapy ; Photodynamic Therapy ; Microscopy, Electron, Scanning ; Biofilms ; Orthodontic Brackets ; Chlorhexidine


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