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Is Super
Southern California Super Doctors
Specialty:
Pediatrics, Infectious Disease
Department Affiliation:
Pediatrics
Hospital Affiliation:
Ronald Reagan UCLA Medical Center
UCLA Mattel Children's Hospital
UCLA Santa Monica Medical Center
State License:
A64837
Languages:
French, Spanish, Portuguese
Phone:
(310) 825-0867
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About Me

Link to Dr. Nielsen's complete CV >

Dr. Karin Nielsen is a Professor of Pediatrics in the Division of Infectious Diseases at UCLA Children's Hospital and a member of the UCLA faculty since 1996. She is an attending physician for Pediatric Infectious Diseases at Mattel Children's Hospital and co-director of the Care4Families HIV clinic at UCLA. Dr. Nielsen is a physician-scientist, originally from Rio de Janeiro, Brazil where she graduated in medicine from the University of Rio de Janeiro and completed pediatric residency training at the Hospital dos Servidores do Estado, also in Rio. At UCLA since 1991, she completed both clinical and research fellowships in pediatric infectious diseases and obtained a master's degree in Public Health/Epidemiology. Dr. Nielsen's main area of research has been pediatric infections particularly in the area of HIV and congenital infections. She is an internationally recognized expert in the field of pediatric HIV and Zika.

Dr. Nielsen has worked extensively in international clinical studies focused on both prevention of perinatal and sexual transmission of HIV and has published extensively on the treatment of this disease in children, adolescents and adults. She is a leading investigator in a number of studies conducted by NIH sponsored HIV networks such as IMPAACT, HPTN, ATN and ACTG, developing clinical trials in North and South America, Sub-Saharan Africa and Asia, many of which have changed management guidelines for HIV and more recently Zika. Dr. Nielsen has a very active collaboration with multiple sites in Brazil both on the field of HIV, congenital infections and more recently ZIKA virus, with active NIH grant funding for her studies. She is a key investigator in a large study of early treatment of HIV infection in at risk youth in Los Angeles and New Orleans and a co-investigator on a pediatric TB study in the Philippines. In addition, Dr. Nielsen is an active clinician licensed in both the U.S. and in Brazil with an interest in tropical and neglected infectious diseases. At UCLA she is an attending physician in Westwood and Santa Monica UCLA hospitals and an attending in the HIV care outpatient clinic and pediatric infectious diseases clinic. She is also s member of the UCLA Institutional Review Board and serves on several NIH study section panels. Dr. Nielsen lectures worldwide on multiple ID and Peds ID topics and has mentored multiple medical students, residents, graduate students and post-doctoral fellows from North, Central and South America, Europe, Africa and Asia.

Primary Office
UCLA Health Westwood Pediatrics
200 UCLA Medical Plaza
Suite 265
Los Angeles, CA 90095
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Phone
(310) 825-0867
Fellowship
Pediatrics/Infectious Diseases, UCLA School of Medicine, 1991-1996
Residency
Pediatrics, Hospital dos Servidores do Estado, 1987-1989
Internship
Pediatrics, Hospital dos Servidores do Estado, 1986-1986
Degree
Universidade Federal do Rio de Janeiro, MD, 1986
Interests
  • Bacteremia
  • Bone and Joint Infections
  • Cardiac and Endovascular Infections
  • Coccidiomycosis
  • General Infectious Diseases

    Common Infectious Diseases

    Detailed information on the most common infectious diseases, including HIV/AIDS, chickenpox, chronic fatigue syndrome, common cold, diphtheria, E. coli, giardiasis, infectious mononucleosis, influenza (flu), lyme disease, malaria, measles, meningitis, mum
    Learn more >
  • Hepatitis C
  • HIV

    HIV and AIDS

    AIDS (acquired immunodeficiency syndrome) is caused by the human immunodeficiency virus (HIV). This kills or impairs cells of the immune system and progressively destroys the body's ability to fight infections and certain cancers. HIV is most commonly spread by sexual contact with an infected partner. Another important means of spreading HIV is contact with infected blood from contaminated needles, syringes, or other drug paraphernalia. 
    Learn more >
  • HIV/AIDS

    HIV and AIDS

    AIDS (acquired immunodeficiency syndrome) is caused by the human immunodeficiency virus (HIV). This kills or impairs cells of the immune system and progressively destroys the body's ability to fight infections and certain cancers. HIV is most commonly spread by sexual contact with an infected partner. Another important means of spreading HIV is contact with infected blood from contaminated needles, syringes, or other drug paraphernalia. 
    Learn more >
  • Hospital acquired infections
  • Infection in Immunocompromised Patients
  • Latent TB (tuberculosis)
  • Medical Device Infections
  • Multi-drug resistant infections
  • Neurologic Infections
  • Pediatrics
  • Pertussis

    Whooping Cough (Pertussis) in Children

    Whooping cough (pertussis) is a contagious illness. It causes intense fits (paroxysms) of coughing. It mainly affects babies and young children.
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  • PrEP (pre-exposure prophylaxis)
  • Sexually Transmitted Disease

    Sexually Transmitted Infections (STIs)

    Women suffer more frequent and severe symptoms from STDs. Some STDs can cause pelvic inflammatory disease, which can lead to both infertility and ectopic pregnancy.
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  • Transplant Infectious Diseases
  • Travel Medicine

    Topic Index - Travel Medicine

    Detailed information on the most common high risk diseases for travelers, including African trypanosomiasis (African sleeping sickness), mad cow disease, HIV, AIDS, cholera, e. coli, dengue fever, diarrheal disease, cryptosporidiosis, diarrhea, traveler's
    Learn more >
  • Tropical Diseases

    Common Health Problems Linked to Travel in Developing Countries

    Detailed information on common health problems associated with travel in developing countries
    Learn more >
  • Viral Diseases

    Common Infectious Diseases

    Detailed information on the most common infectious diseases, including HIV/AIDS, chickenpox, chronic fatigue syndrome, common cold, diphtheria, E. coli, giardiasis, infectious mononucleosis, influenza (flu), lyme disease, malaria, measles, meningitis, mum
    Learn more >
Publications
Link to my PubMed publications >
In The News

HIV in Infants: What More Can Be Done? - (consultant360.com) May 3, 2018
Brazilian TV profiles Director of UCLA Center for Brazilian Studies - (UCLA International Institute) October 11, 2017
Study: Zika may affect babies even in later stages of pregnancy - (USA Today) April 14, 2016
Zika linked to abnormal pregnancies, fetal death, new research finds - (UCLA Newsroom) March 4, 2016
Latest Zika Findings: UCLA Center for World Health Zika Forum - (UCLA Center for World Health)

Note: News links may expire without notice.

Awards
  • Infectious Diseases Society of America (IDSA) Carolyn B. Hall 2019 lectureship award for outstanding contributions to pediatric infectious diseases.
  • Dr. Nielsen has been listed in the Consumer's Research Council of America as one of America's Top Physicians in Pediatric Infectious Diseases for many years.
  • Elected member in the Society for Pediatric Research, the American Pediatric Society, and the International AIDS Society.
  • Scientist investigator in the NIH HIV networks, for Pediatrics, Adolescent Medicine, Prevention and Treatment of HIV (IMPAACT, ATN, ACTG and HPTN networks funded by the NIH). International AIDS Society (IAS).
  • Diaspora Award for Best Health Professional in 2014 by the government of Brazil.
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UCLA Mattel Children's Hospital Media Relations: FY2016-17 in Review
Karin Nielsen, MD click here to update your profile
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