Ritche Manos Hao, MD, BS
Assistant Professor of Medicine (Infectious DiseasesDownloadHi-Res Photo
Cards
Are You a Patient?
View this doctor's clinical profile on the Yale Medicine website for information about the services we offer and making an appointment.
View Doctor ProfileAdditional Titles
Medical Director, Information Technology-Physician Training, Yale New Haven Health System
Medical Information Officer, Information Technology, Yale New Haven Health System
Contact Info
Are You a Patient?
View this doctor's clinical profile on the Yale Medicine website for information about the services we offer and making an appointment.
View Doctor ProfileAdditional Titles
Medical Director, Information Technology-Physician Training, Yale New Haven Health System
Medical Information Officer, Information Technology, Yale New Haven Health System
Contact Info
Are You a Patient?
View this doctor's clinical profile on the Yale Medicine website for information about the services we offer and making an appointment.
View Doctor ProfileAdditional Titles
Medical Director, Information Technology-Physician Training, Yale New Haven Health System
Medical Information Officer, Information Technology, Yale New Haven Health System
Contact Info
About
Titles
Assistant Professor of Medicine (Infectious Diseases
Positions outside Yale
Medical Director, Information Technology-Physician Training, Yale New Haven Health System; Medical Information Officer, Information Technology, Yale New Haven Health System
Appointments
Infectious Diseases
Assistant ProfessorPrimaryBiomedical Informatics & Data Science
Assistant ProfessorSecondary
Other Departments & Organizations
Education & Training
- Fellowship
- University of Vermont (2006)
- Residency
- University of Connecticut Health Center (2004)
- Internship
- University of Connecticut (2002)
- Intern
- Philippine General Hospital (1999)
- MD
- University of Philippines, College of Medicine (1999)
- BS
- University of the Philippines Diliman, Psychology
Research
Research at a Glance
Yale Co-Authors
Frequent collaborators of Ritche Manos Hao's published research.
Publications Timeline
A big-picture view of Ritche Manos Hao's research output by year.
Haddon Pantel, MD
Michael Virata, MD, FACP, FIDSA
Amit Achhra, MPH, PhD, MD
Lydia Aoun-Barakat, MD
Merceditas Villanueva, MD
Abhijeet Danve, MBBS, MD, MHS
13Publications
22Citations
Publications
2025
Utilizing Internet Search Trends and Wastewater Surveillance to Identify Infectious Disease Outbreaks in Communities
Zulli A, Zhang Z, Ruedaflores M, Sahly J, Angel D, Rohatgi K, Malik W, Hao R, Shepherd J, Peccia J. Utilizing Internet Search Trends and Wastewater Surveillance to Identify Infectious Disease Outbreaks in Communities. Environmental Science And Technology 2025, 59: 3401-3410. PMID: 39935181, DOI: 10.1021/acs.est.4c05723.Peer-Reviewed Original ResearchReal-world Rollout of Injectable Antiretrovirals for HIV Prevention and Treatment: Correlates of Early Adoption
Koshy L, Payne E, Barakat L, Hao R, Sureshanand S, Ornelas A, Dewan A, Meyer J. Real-world Rollout of Injectable Antiretrovirals for HIV Prevention and Treatment: Correlates of Early Adoption. Open Forum Infectious Diseases 2025, 12: ofaf029. DOI: 10.1093/ofid/ofaf029.Peer-Reviewed Original ResearchAltmetricConceptsLAI-PrEPLAI-ARTSocial determinants of healthSubstance use disordersDeterminants of healthLong-actingRetrospective cohortRetrospective cohort of patientsSocial determinantsHIV preventionCohort of patientsFisher's exact testPre-exposure prophylaxisOvercome health inequitiesHealth equity lensPrEP patientsChi-square testUrban health systemMedian ageBivariate logistic regressionOral PrEPPublic health interventionsBackground DataExact testHIV treatment
2024
Five-Year Evaluation of an Anal Cancer Screening Program in Men Who Have Sex With Men With HIV at 2 Academic Center Clinics
Achhra A, Chan E, Applebaum S, Guerrero M, Hao R, Pantel H, Virata M, Fikrig M, Barakat L. Five-Year Evaluation of an Anal Cancer Screening Program in Men Who Have Sex With Men With HIV at 2 Academic Center Clinics. Clinical Infectious Diseases 2024, ciae541. PMID: 39492696, DOI: 10.1093/cid/ciae541.Peer-Reviewed Original ResearchCitationsConceptsHigh-resolution anoscopyAnal cytologyAnal cancer screening programAbnormal anal cytologyAcademic HIV clinicSquamous cell carcinomaRetrospective chart reviewHistory of smokingEligible populationCancer screening programDetecting HSILAbnormal cytologyTriage testCell carcinomaHIV clinicChart reviewOlder age groupsHSILFollow-upCytologyScreening programScreening testCenter clinicIncreasing ageEligible individualsExperience with expanded use of oritavancin in a tertiary hospital: indications, tolerability and outcomes
Bandaranayake T, Radcliffe C, Cvercko M, Golden M, Hao R. Experience with expanded use of oritavancin in a tertiary hospital: indications, tolerability and outcomes. JAC-Antimicrobial Resistance 2024, 6: dlae174. PMID: 39493938, PMCID: PMC11524893, DOI: 10.1093/jacamr/dlae174.Peer-Reviewed Original ResearchCitationsAltmetricConceptsDose of oritavancinInfective endocarditisTreatment of acute bacterial skinBacterial infectionsLipoglycopeptide antibacterial agentTertiary care medical centreAcute bacterial skinGram-positive bacterial infectionsInvasive bacterial infectionsTreatment failure rateNinety-five adult patientsSoft tissue infectionsProsthetic joint infectionGram-positive organismsBacterial skinDrug discontinuationTissue infectionsRetrospective studyAdult patientsClinical outcomesAdverse eventsOritavancinOff-labelJoint infectionTreat infectionsIs yearly interferon gamma release assay latent tuberculosis infection screening warranted among patients with rheumatological diseases on disease-modifying drugs in non-endemic settings?
Palacios C, Chowdhary V, Hao R, Danve A, Malinis M. Is yearly interferon gamma release assay latent tuberculosis infection screening warranted among patients with rheumatological diseases on disease-modifying drugs in non-endemic settings? PLOS ONE 2024, 19: e0306337. PMID: 38959249, PMCID: PMC11221665, DOI: 10.1371/journal.pone.0306337.Peer-Reviewed Original ResearchCitationsMeSH Keywords and ConceptsConceptsInterferon-gamma release assayDisease-modifying antirheumatic drugsInterferon-gamma release assay testLatent tuberculosis infectionNon-endemic settingsRheumatologic diseasesRisk factorsPositive interferon-gamma release assayLatent tuberculosis infection screeningLatent tuberculosis infection diagnosisPositive IGRA testMonths of rifampinLow-risk patientsRetrospective chart reviewTNF-alpha inhibitorsTB risk factorsTargeted LTBI screeningOutpatient rheumatology clinicDisease-modifying drugsIGRA testPatient demographicsAdult patientsChart reviewAntirheumatic drugsNon-endemic areas
2023
1478. Evaluation Of Anal Cancer Screening Program in men who have sex with men (MSM) persons with HIV (PWH) At Two academic center HIV Clinics 2018-2022
Achhra A, Chan E, Applebaum S, Guerrero M, Hao R, Pantel H, Virata M, Barakat L. 1478. Evaluation Of Anal Cancer Screening Program in men who have sex with men (MSM) persons with HIV (PWH) At Two academic center HIV Clinics 2018-2022. Open Forum Infectious Diseases 2023, 10: ofad500.1314. PMCID: PMC10677807, DOI: 10.1093/ofid/ofad500.1314.Peer-Reviewed Original ResearchConceptsAnal dysplasiaAbnormal PapHIV clinicAnal cancer screening programsAmbulatory HIV clinicRetrospective chart reviewHistory of smokingCancer screening programsSquamous cell carcinomaAnal cytologyAntiretroviral therapyHIV careChart reviewClinic visitsMedian ageMultivariable analysisCell carcinomaScreening programPrior historyAge 35High riskType of insuranceBackground treatmentCharacteristics of peoplePWHExpanded or Risk Factor-Based Annual Screening for Hepatitis C Virus (HCV) Among Persons With HIV: Which Is the Best Approach?
Hao R, Brooks R, Zelenev A, Spinner G, Barakat L, Villanueva M. Expanded or Risk Factor-Based Annual Screening for Hepatitis C Virus (HCV) Among Persons With HIV: Which Is the Best Approach? Health Promotion Practice 2023, 24: 1009-1017. PMID: 37439817, DOI: 10.1177/15248399231169794.Peer-Reviewed Original ResearchCitationsAltmetricMeSH Keywords and ConceptsConceptsHepatitis C virusRisk factor-based screeningElectronic medical recordsHIV clinicAnnual screeningC virusRisk factorsScreening siteAnnual screening ratesNew HCV diagnosesClinical decision support toolRisk factor assessmentPublic health expertsHCV testingHCV casesClinical decision supportHCV diagnosisHCV testScreening ratesProspective studyMedical recordsPositivity ratePositive casesUnprotected sexClinic
2022
1897. The Decline of Respiratory Viruses During the SARS-CoV-2 Pandemic: Public Health Interventions vs. Viral Competition?
Malik W, Hao R, Shepherd J. 1897. The Decline of Respiratory Viruses During the SARS-CoV-2 Pandemic: Public Health Interventions vs. Viral Competition? Open Forum Infectious Diseases 2022, 9: ofac492.1524. DOI: 10.1093/ofid/ofac492.1524.Peer-Reviewed Original ResearchConceptsYale New Haven Health SystemSARS-CoV-2SARS-CoV-2 pandemicNon-pharmaceutical interventionsRespiratory virusesInfluenza A/BSARS-CoV-2 infectionSARS-CoV-2 testPositive RSV testRates of influenzaSeasonal respiratory virusesPublic health interventionsWeekly testsCOVID-19 databasePre-pandemic dataRSV testPre-pandemic levelsPositivity rateInfluenza APositive testNegative testSame periodHealth interventionsAge groupsRelaxation of NPIsDo Cultures From Percutaneously Drained Intra-abdominal Abscesses Change Treatment? A Retrospective Review
Esposito A, Zhang Y, Nagarkatti N, Laird W, Coppersmith N, Reddy V, Leeds I, Mongiu A, Longo W, Hao R, Pantel H. Do Cultures From Percutaneously Drained Intra-abdominal Abscesses Change Treatment? A Retrospective Review. Diseases Of The Colon & Rectum 2022, 66: 451-457. PMID: 36538708, DOI: 10.1097/dcr.0000000000002644.Peer-Reviewed Original ResearchMeSH Keywords and ConceptsConceptsIntra-abdominal abscessPercutaneous drainAntimicrobial therapyLos pacientesAbdominal abscessSingle university-affiliated institutionRetrospective medical record reviewEmpiric antibiotic regimensSolid organ transplantsMedical record reviewUniversity-affiliated institutionCulture dataAntibiotic coursesAbdominal infectionAntibiotic regimensActive smokersMedian ageActive chemotherapyRecord reviewEvidence-based practiceMedian lengthUtility of cultureFemale sexIntraoperative culturesInclusion criteria
2018
Efficacy of an 8-week course of sofosbuvir and ledipasvir for the treatment of HCV infection in selected HIV-infected patients
Ogbuagu O, Hao R, Virata M, Villanueva MS, Malinis M. Efficacy of an 8-week course of sofosbuvir and ledipasvir for the treatment of HCV infection in selected HIV-infected patients. F1000Research 2018, 6: 620. PMID: 30344999, PMCID: PMC6171717, DOI: 10.12688/f1000research.11397.2.Peer-Reviewed Original ResearchCitationsConceptsHCV genotype 1 infectionGenotype 1 infectionHCV viral loadSOF/LDVViral loadSVR 12Treatment regimenGenotype 1Sustained virologic response 12 weeksYale New Haven Health SystemIU/HCV co-infected patientsVirologic response 12 weeksCo-infected patientsHCV treatment regimenMono-infected patientsSimilar viral loadsCompletion of therapyHCV genotype 1HIV viral loadSame treatment regimenSofosbuvir/ledipasvirStudy eligibility criteriaAntiretroviral therapyHCV infection
Academic Achievements & Community Involvement
activity Department of Internal Medicine Diversity Equity and Inclusion Committee, Yale School of Medicine
CommitteesMemberDetails07/01/2021 - Presentactivity American Academy of HIV Medicine HIV Credentialing Exam Item Review
Professional OrganizationsParticipantDetails10/13/2022 - Presentactivity Yale New Haven Hospital Committee for Clinical Decision Support
CommitteesMemberDetails11/01/2022 - Presentactivity YNHH Epic Physician Builder Program
CommitteesLeadDetails11/01/2022 - Presentactivity Yale New Haven Health System Epic System Document Management Committee
CommitteesMemberDetails04/07/2023 - Present
Teaching & Mentoring
Mentoring
Logan Flaxman
Clinical Fellow2024 - PresentAlexandra Yamshchikov
Faculty2023 - 2024
Clinical Care
Overview
Ritche Hao, MD, is an infectious diseases specialist who specializes in the care of patients with a variety of conditions, including HIV/AIDS, hepatitis C, prosthetic joint infection, osteomyelitis, and staphylococcus (staph) infection.
“The field of infectious diseases is always interesting and challenging at the same time,” says Dr. Hao. “The field of HIV care is fast evolving and the advances that have happened thus far give me hope that we are going to have a cure one day,” he says. In fact, he says, he is already able to help most of his patients who have HIV thrive and live normal lives.
Dr. Hao wants to tell his new patients, “I am here to help you.”
Clinical Specialties
Infectious Diseases; HIV & AIDs Medicine
Fact Sheets
Meningitis
Learn More on Yale MedicineClostridium difficile ( C. diff )
Learn More on Yale MedicineParasitic Diseases
Learn More on Yale MedicinePneumonia
Learn More on Yale Medicine
Yale Medicine News
Are You a Patient?
View this doctor's clinical profile on the Yale Medicine website for information about the services we offer and making an appointment.
View Doctor ProfileNews
Get In Touch
Contacts
Locations
Patient Care Locations
Are You a Patient? View this doctor's clinical profile on the Yale Medicine website for information about the services we offer and making an appointment.
Events
May 20251Thursday