Alex Ortega Loayza

Assistant Professor

  • 494 Citations
  • 13 h-Index
20062019
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Research Output 2006 2019

2006
17 Citations (Scopus)

Antibodies against desmoglein 1 in healthy subjects in endemic and nonendemic areas of pemphigus foliaceus (fogo selvagem) in Peru

Ortega Loayza, A., Ramos, W., Elgart, G., Bouman, P., Jiménez, G., Avila, J., Rojas, I., Vilcarromero, M., Hurtado, J., Lindo, G. & Galarza, C., May 1 2006, In : International Journal of Dermatology. 45, 5, p. 538-542 5 p.

Research output: Contribution to journalArticle

Desmoglein 1
Peru
Pemphigus
Healthy Volunteers
Antibodies
2007
23 Citations (Scopus)

Endemic pemphigus vulgaris

Rocha-Alvarez, R., Ortega Loayza, A., Friedman, H., Campbell, I., Aoki, V., Rivitti, E. A., Dasher, D., Li, N. & Diaz, L. A., Jul 1 2007, In : Archives of Dermatology. 143, 7, p. 895-899 5 p.

Research output: Contribution to journalArticle

Open Access
Pemphigus
Immunoprecipitation
Enzyme-Linked Immunosorbent Assay
Autoantibodies
Brazil
2008
2 Citations (Scopus)

Case report/focused review: Multivessel acute myocardial infarction: Case report and review of the literature

Ortega Loayza, A. & Stouffer, G. A., Jan 1 2008, In : American Journal of the Medical Sciences. 335, 5, p. 375-378 4 p.

Research output: Contribution to journalArticle

Myocardial Infarction
Coronary Vessels
Thrombosis
Arteries
Coronary Vasospasm
19 Citations (Scopus)

Eosinophilic fasciitis in a female child

Ortega Loayza, A., Merritt, B. G., Groben, P. A. & Morrell, D. S., May 1 2008, In : Journal of the American Academy of Dermatology. 58, 5 SUPPL. 1

Research output: Contribution to journalArticle

Fasciitis
Eosinophilia
Methotrexate
Steroids
Pediatrics
3 Citations (Scopus)

Noninfectious dermatological diseases associated with chronic exposure to mine tailings in a Peruvian district

Ramos, W., Galarza, C., Ronceros, G., De Amat, F., Teran, M., Pichardo, L., Juarez, D., Anaya, R., Mayhua, A., Hurtado, J. & Ortega Loayza, A., Jul 1 2008, In : British Journal of Dermatology. 159, 1, p. 169-174 6 p.

Research output: Contribution to journalArticle

Dermatitis
Atopic Dermatitis
Odds Ratio
Confidence Intervals
Arsenicals
2009
17 Citations (Scopus)

Cutaneous acanthamebiasis infection in immunocompetent and immunocompromised patients

Galarza, C., Ramos, W., Gutierrez, E. L., Ronceros, G., Teran, M., Uribe, M., Ñavincopa, M. & Ortega Loayza, A., Jan 1 2009, In : International Journal of Dermatology. 48, 12, p. 1324-1329 6 p.

Research output: Contribution to journalArticle

Open Access
Immunocompromised Host
Skin
Acanthamoeba
Infection
Peru
3 Citations (Scopus)

Gestante con pénfigo foliáceo endémico y producto libre de enfermedad. Caso clínico

Translated title of the contribution: Endemic pemphigus foliaceus in a pregnant woman. Report of one caseGalarza, C., Gutiérrez, E. L., Ramos, W., Tello, M., Ronceros, G., Alvizuri, S., Valverde, F. & Ortega Loayza, A., Nov 26 2009, In : Revista Medica de Chile. 137, 9, p. 1205-1208 4 p.

Research output: Contribution to journalArticle

Pregnant Women
Immunoglobulin G
Mothers
Newborn Infant
Indirect Fluorescent Antibody Technique
2 Citations (Scopus)

Tiempo de espera y su relación con la satisfacción de los usuarios en la farmacia central de un hospital general de Lima

Translated title of the contribution: Waiting time and its relation with the user's satisfaction in the central pharmacy of a general hospital in LimaGutierrez, E., Ramos, W., Uribe, M., Ortega Loayza, A., Torres, C., Montesinos, D., León, O. & Galarza, C., Jan 1 2009, In : Revista Peruana de Medicina Experimental y Salud Publica. 26, 1, p. 61-65 5 p.

Research output: Contribution to journalArticle

General Hospitals
Cross-Sectional Studies
Observation
Pharmaceutical Preparations
2010
14 Citations (Scopus)

Aspirin desensitization/challenge in 3 patients with unstable angina

Ortega Loayza, A., Raza, S., Minisi, A. J., Topaz, O., Heller, A. & Jovin, I. S., Jan 1 2010, In : American Journal of the Medical Sciences. 340, 5, p. 418-420 3 p.

Research output: Contribution to journalArticle

Unstable Angina
Aspirin
Percutaneous Coronary Intervention
Therapeutics
13 Citations (Scopus)

Characterization of Staphylococcus aureus cutaneous infections in a pediatric dermatology tertiary health care outpatient facility

Ortega Loayza, A., Diamantis, S. A., Gilligan, P. & Morrell, D. S., May 1 2010, In : Journal of the American Academy of Dermatology. 62, 5, p. 804-811 8 p.

Research output: Contribution to journalArticle

Tertiary Healthcare
Dermatology
Staphylococcus aureus
Methicillin Resistance
Outpatients

Cutaneous arsenicism in Latin America: A public health problem

Ramos, W., De Amat, F., Galarza, C. & Ortega Loayza, A., Jan 1 2010, Environmental Health Risks: Lead Poisoning and Arsenic Exposure. Nova Science Publishers, Inc., p. 167-176 10 p.

Research output: Chapter in Book/Report/Conference proceedingChapter

Latin America
Public Health
Skin
15 Citations (Scopus)

Cutaneous manifestations of internal malignancies in a tertiary health care hospital of a developing country

Ortega Loayza, A., Ramos, W., Gutierrez, E. L., De Paz, P. C., Bobbio, L. & Galarza, C., Sep 1 2010, In : Anais Brasileiros de Dermatologia. 85, 5, p. 736-742 7 p.

Research output: Contribution to journalArticle

Skin Manifestations
Tertiary Healthcare
Skin Diseases
Developing Countries
Delivery of Health Care
12 Citations (Scopus)

Facial porokeratosis: A series of six patients

Gutierrez, E. L., Galarza, C., Ramos, W., Tello, M., De Paz, P. C., Bobbio, L., Barquinero, A., Ronceros, G. & Ortega Loayza, A., Aug 1 2010, In : Australasian Journal of Dermatology. 51, 3, p. 191-194 4 p.

Research output: Contribution to journalArticle

Porokeratosis
Isotretinoin
Peru
14 Citations (Scopus)

Influence of climatic factors on the medical attentions of dermatologic diseases in a hospital of Lima, Peru

Gutierrez, E. L., Ramos, W., Smith, M. E., Galarza, C., Mendoza, M. & Ortega Loayza, A., Jul 1 2010, In : Anais Brasileiros de Dermatologia. 85, 4, p. 461-468 8 p.

Research output: Contribution to journalArticle

Peru
Warts
Rosacea
Actinic Keratosis
International Classification of Diseases
3 Citations (Scopus)

Meningoencefalite causada por Cryptococcus gattii em um paciente HIV-negativo procedente dos Andes Peruanos

Translated title of the contribution: Cryptococcus gattii meningoencephalitis in an HIV-negative patient from the Peruvian AndesGutierrez, E. L., Valqui, W., Vilchez, L., Evangelista, L., Crispin, S., Tello, M., Ñavincopa, M., Béjar, V., Gonzáles, J. & Ortega Loayza, A., Jan 1 2010, In : Revista da Sociedade Brasileira de Medicina Tropical. 43, 4, p. 469-471 3 p.

Research output: Contribution to journalArticle

Open Access
Cryptococcus gattii
Meningoencephalitis
HIV
Peru
Fluconazole
1 Citation (Scopus)

Night blindness in a patient with acquired immunodeficiency syndrome

Shukla, A., Ortega Loayza, A., Childress, C. G. & Stevens, M., May 1 2010, In : American Journal of the Medical Sciences. 339, 5, 1 p.

Research output: Contribution to journalArticle

Night Blindness
Vitamin A Deficiency
Intramuscular Injections
Vitamin A
Acquired Immunodeficiency Syndrome
11 Citations (Scopus)

Skin diseases in the Peruvian Amazonia

Gutierrez, E. L., Galarza, C., Ramos, W., Tello, M., Jiménez, G., Ronceros, G., Chía, H., Hurtado, J. & Ortega Loayza, A., Jul 1 2010, In : International Journal of Dermatology. 49, 7, p. 794-800 7 p.

Research output: Contribution to journalArticle

Skin Diseases
Subcutaneous Tissue
Oceans and Seas
Skin
Lice Infestations
2011
5 Citations (Scopus)

Miliária 'rash' após neutropenia febril e quimioterapia de indução para a leucemia mielóide aguda

Translated title of the contribution: Miliaria-rash after neutropenic fever and induction chemotherapy for acute myelogenous leukemiaNguyen, T. A., Ortega Loayza, A. & Stevens, M. P., Jul 1 2011, In : Anais Brasileiros de Dermatologia. 86, 4 SUPPL. 1, p. 104-106 3 p.

Research output: Contribution to journalArticle

Miliaria
Induction Chemotherapy
Exanthema
Acute Myeloid Leukemia
Fever
8 Citations (Scopus)
Staphylococcal Skin Infections
Bacterial Drug Resistance
Methicillin Resistance
Clindamycin
Sulfamethoxazole Drug Combination Trimethoprim
2012
3 Citations (Scopus)

Historical notes on endemic pemphigus in South America

Chacón, G. R., Ortega Loayza, A. & Cyr, R. M., Apr 1 2012, In : International Journal of Dermatology. 51, 4, p. 477-481 5 p.

Research output: Contribution to journalArticle

21st Century History
18th Century History
19th Century History
20th Century History
Endemic Diseases

Molecular basis for selected inherited skin disorders

Krishna, S. M., Sprigle, A. & Ortega Loayza, A., Nov 1 2012, In : Journal of Drugs in Dermatology. 11, 11, p. 1361-1363 3 p.

Research output: Contribution to journalArticle

Skin
2 Citations (Scopus)

Necrolytic acral erythema

Grauel, E., Stechschulte, S., Ortega Loayza, A., Krishna, S. M. & Nunley, J. R., Nov 1 2012, In : Journal of Drugs in Dermatology. 11, 11, p. 1370-1371 2 p.

Research output: Contribution to journalArticle

Foot Dermatoses
Hand Dermatoses
Zinc Sulfate
Chronic Hepatitis C
Erythema
9 Citations (Scopus)

Pênfigo endêmico na amazônia peruana: Epidemiologia e fatores de risco para o desenvolvimento de complicações durante o tratamento

Translated title of the contribution: Endemic pemphigus in the Peruvian Amazon: Epidemiology and risk factors for the development of complications during treatmentRamos, W., Chacon, G. R., Galarza, C., Gutierrez, E. L., Smith, M. E. & Ortega Loayza, A., Nov 1 2012, In : Anais Brasileiros de Dermatologia. 87, 6, p. 838-845 8 p.

Research output: Contribution to journalArticle

Open Access
Pemphigus
Epidemiology
Peru
Therapeutics
Pyelonephritis
2013
4 Citations (Scopus)

Amlodipine-induced subacute cutaneous lupus

Ortega Loayza, A., McCall, C. O., Cooke, R. H. & Jovin, I. S., Mar 1 2013, In : North American Journal of Medical Sciences. 5, 3, p. 246-247 2 p.

Research output: Contribution to journalLetter

Amlodipine
Skin
6 Citations (Scopus)

Blastomicose cutânea: Um sinal de doença sistêmica

Translated title of the contribution: Cutaneous blastomycosis: A clue to a systemic diseaseOrtega Loayza, A. & Nguyen, T., Jan 1 2013, In : Anais Brasileiros de Dermatologia. 88, 2, p. 287-289 3 p.

Research output: Contribution to journalArticle

Open Access
Blastomycosis
Skin
Spontaneous Fractures
Saccharomycetales
Itraconazole
12 Citations (Scopus)

Crusted scabies and multiple dosages of ivermectin

Ortega Loayza, A., McCall, C. O. & Nunley, J. R., May 1 2013, In : Journal of Drugs in Dermatology. 12, 5, p. 584-585 2 p.

Research output: Contribution to journalArticle

Scabies
Ivermectin
Permethrin
Centers for Disease Control and Prevention (U.S.)
Bone Marrow
2 Citations (Scopus)

Cutaneous blastomycosis

Ortega Loayza, A. & McCall, C. O., Mar 7 2013, In : New England Journal of Medicine. 368, 10

Research output: Contribution to journalArticle

Blastomycosis
Skin
8 Citations (Scopus)

Endemic pemphigus foliaceus in the Peruvian Amazon

Ortega Loayza, A., Ramos, W., Gutierrez, E. L., Jimenez, G., Rojas, I. & Galarza, C., Aug 1 2013, In : Clinical and Experimental Dermatology. 38, 6, p. 594-600 7 p.

Research output: Contribution to journalArticle

Immunoglobulin G
Autoantibodies
Peru
Indirect Fluorescent Antibody Technique
Anti-Idiotypic Antibodies
12 Citations (Scopus)

Microarray technique, analysis, and applications in dermatology

Villaseñor-Park, J. & Ortega Loayza, A., Apr 1 2013, In : Journal of Investigative Dermatology. 133, 4

Research output: Contribution to journalArticle

Open Access
Dermatology
Microarrays
2014
7 Citations (Scopus)

A rapidly progressive and fatal case of atypical acute generalized exanthematous pustulosis

Krishna, S., Ortega Loayza, A., Malakouti, N. & Brinster, N., Jan 1 2014, In : Journal of the American Academy of Dermatology. 71, 3

Research output: Contribution to journalArticle

Open Access
Acute Generalized Exanthematous Pustulosis
Stevens-Johnson Syndrome
Fatal Outcome
Multiple Organ Failure
Combination Drug Therapy
2015
20 Citations (Scopus)

Acute generalized exanthematous pustulosis: Atypical presentations and outcomes

Kostopoulos, T. C., Krishna, S. M., Brinster, N. K. & Ortega Loayza, A., Jan 1 2015, In : Journal of the European Academy of Dermatology and Venereology. 29, 2, p. 209-214 6 p.

Research output: Contribution to journalReview article

Acute Generalized Exanthematous Pustulosis
Drug Hypersensitivity Syndrome
Drug Eruptions
Stevens-Johnson Syndrome
Therapeutics

Dapsone and Autoimmune Bullous Disorders

Werth, V. P. & Ortega Loayza, A., Jan 1 2015, Blistering Diseases: Clinical Features, Pathogenesis, Treatment. Springer Berlin Heidelberg, p. 493-499 7 p.

Research output: Chapter in Book/Report/Conference proceedingChapter

Dapsone
Skin Diseases
Conjunctivitis
Cicatrix
Trichiasis
7 Citations (Scopus)

Molecular characterization and antifungal susceptibility of Cryptococcus neoformans strains collected from a single institution in Lima, Peru

Bejar, V., Tello, M., García, R., Guevara, J. M., Gonzales, S., Vergaray, G., Valencia, E., Abanto, E., Ortega Loayza, A., Hagen, F. & Gutierrez, E. L., Apr 1 2015, In : Revista Iberoamericana de Micologia. 32, 2, p. 88-92 5 p.

Research output: Contribution to journalArticle

Cryptococcus neoformans
Peru
Genotype
Cryptococcus gattii
Tropical Medicine

Pathophysiology of Pyoderma Gangrenosum

Tiwari, N., Kostopoulos, T. C. & Ortega Loayza, A., Jan 1 2015, Advances in Medicine and Biology. Nova Science Publishers, Inc., Vol. 83. p. 1-12 12 p.

Research output: Chapter in Book/Report/Conference proceedingChapter

Pyoderma Gangrenosum
Inflammasomes
Skin Diseases
Necrosis
Research Personnel
86 Citations (Scopus)

Pathophysiology of pyoderma gangrenosum (PG): An updated review

Braswell, S. F., Kostopoulos, T. C. & Ortega Loayza, A., Oct 1 2015, In : Journal of the American Academy of Dermatology. 73, 4, p. 691-698 8 p.

Research output: Contribution to journalReview article

Pyoderma Gangrenosum
Skin Manifestations
Thrombophilia
Early Diagnosis
Immune System
2 Citations (Scopus)

Pyoderma gangrenosum after open heart surgery: A rare and challenging postoperative complication

Kostopoulos, T. C., Ortega Loayza, A., Francis, J., Maiberger, M. P., Brinster, N. K., Brinster, D. R., Feldman, M. J. & Nunley, J. R., Jan 1 2015, In : Chirurgia (Turin). 28, 1, p. 37-41 5 p.

Research output: Contribution to journalArticle

Pyoderma Gangrenosum
Thoracic Surgery
Negative-Pressure Wound Therapy
Wounds and Injuries
Immunotherapy

Vulvar edema and weight loss in a pediatric patient

Gupta, A. S., O'Connor, P. W. & Ortega Loayza, A., Jan 1 2015, In : Journal of the American Academy of Dermatology. 73, 6, p. e193-e194

Research output: Contribution to journalArticle

Weight Loss
Edema
Pediatrics
2016

Aortic endograft and epithelioid sarcoma: A random association or causality?

Tiwari, N., Krishna, S. & Ortega Loayza, A., Jul 1 2016, In : Journal of Drugs in Dermatology. 15, 7, p. 897-899 3 p.

Research output: Contribution to journalArticle

Hemangiosarcoma
Sarcoma
Causality
Polyethylene Terephthalates
Carcinogens
2 Citations (Scopus)

Calciphylaxis with evidence of hypercoagulability successfully treated with unfractionated heparin: A multidisciplinary approach

Carter, A., Ortega Loayza, A., Barrett, J. & Nunley, J. R., Apr 1 2016, In : Clinical and Experimental Dermatology. 41, 3, p. 275-278 4 p.

Research output: Contribution to journalArticle

Calciphylaxis
Thrombophilia
Heparin
Skin
Hyperparathyroidism
15 Citations (Scopus)

Pyoderma gangrenosum and pregnancy: An example of abnormal inflammation and challenging treatment

Steele, R. B., Nugent, W. H., Braswell, S. F., Frisch, S., Ferrell, J. & Ortega Loayza, A., Jan 1 2016, In : British Journal of Dermatology. 174, 1, p. 77-87 11 p.

Research output: Contribution to journalArticle

Pyoderma Gangrenosum
Inflammation
Pregnancy
Therapeutics
Inflammatory Bowel Diseases

Scattered targetoid papules and mucosal erosions after vaccination

Leib, A. E., Steele, R. B. & Ortega Loayza, A., Oct 1 2016, In : Journal of the American Academy of Dermatology. 75, 4, p. e129-e130

Research output: Contribution to journalArticle

Vaccination
2017
5 Citations (Scopus)

Cutaneous Lupus: A Brief Review of Old and New Medical Therapeutic Options

Nutan, F. & Ortega Loayza, A., Oct 1 2017, In : Journal of Investigative Dermatology Symposium Proceedings. 18, 2, p. S64-S68

Research output: Contribution to journalReview article

Open Access
Cutaneous Lupus Erythematosus
Discoid Lupus Erythematosus
Skin Manifestations
Skin
Systemic Lupus Erythematosus
18 Citations (Scopus)

Drug-induced pyoderma gangrenosum: a model to understand the pathogenesis of pyoderma gangrenosum

Wu, B. C., Patel, E. D. & Ortega Loayza, A., Jul 1 2017, In : British Journal of Dermatology. 177, 1, p. 72-83 12 p.

Research output: Contribution to journalReview article

Pyoderma Gangrenosum
Pharmaceutical Preparations
Keratinocytes
Epigenomics
Neutrophils

Incidental skin malignancies in teledermatology and in-person cohorts in the Veterans Affairs Health System

Keleshian, V., Ortega Loayza, A. & Tarkington, P., Nov 1 2017, In : Journal of the American Academy of Dermatology. 77, 5, p. 965-966 2 p.

Research output: Contribution to journalArticle

Telepathology
Veterans Health
United States Department of Veterans Affairs
Incidental Findings
Skin Neoplasms
5 Citations (Scopus)

Ocular pyoderma gangrenosum: A systematic review

Gupta, A. S. & Ortega Loayza, A., Mar 1 2017, In : Journal of the American Academy of Dermatology. 76, 3, p. 512-518 7 p.

Research output: Contribution to journalArticle

Pyoderma Gangrenosum
Orbit
Corneal Ulcer
Recurrence
Combined Modality Therapy
3 Citations (Scopus)

Somatic symptom disorder in dermatology

Levenson, J. L., Sharma, A. A. & Ortega Loayza, A., May 1 2017, In : Clinics in Dermatology. 35, 3, p. 246-251 6 p.

Research output: Contribution to journalArticle

Dermatology
Psychiatry
Emotions
Body Dysmorphic Disorders
Delusions
2018

Antidesmoglein 1 and 3 antibodies in healthy subjects of a population in the Peruvian high amazon

Ramos, W., Díaz, J., Gutierrez, E. L., Lazarte, J. S., Bohnett, M. C., Ronceros, G. & Ortega Loayza, A., Mar 1 2018, In : International Journal of Dermatology. 57, 3, p. 344-348 5 p.

Research output: Contribution to journalArticle

Anti-Idiotypic Antibodies
Healthy Volunteers
Enzyme-Linked Immunosorbent Assay
Antibodies
Immunoglobulin G
4 Citations (Scopus)
Pyoderma Gangrenosum
Lung
2 Citations (Scopus)

Biologic and small-molecule medications in the management of pyoderma gangrenosum

McKenzie, F., Cash, D., Gupta, A., Cummings, L. W. & Ortega Loayza, A., Jan 1 2018, (Accepted/In press) In : Journal of Dermatological Treatment.

Research output: Contribution to journalArticle

Pyoderma Gangrenosum
Therapeutics
Skin
Clinical Pharmacology
Immunosuppressive Agents
8 Citations (Scopus)

Diagnosis and management of peristomal pyoderma gangrenosum: A systematic review

Afifi, L., Sanchez, I. M., Wallace, M. M., Braswell, S. F., Ortega Loayza, A. & Shinkai, K., Jun 1 2018, In : Journal of the American Academy of Dermatology. 78, 6, p. 1195-1204.e1

Research output: Contribution to journalReview article

Pyoderma Gangrenosum
Ostomy
Inflammatory Bowel Diseases
Therapeutics
Guidelines