Overview

Background

Malaria is a serious infection caused by a parasite. People get malaria when an infected mosquito bites them. Malaria can cause major health and social problems in places were malaria is common, such as Africa but can also affect travelers who have never been exposed to malaria. Researchers at the NIH want to find a safe and effective malaria vaccine, antimalarial drugs, or prevention regimen. To do this, healthy volunteers are recruited under a general screening study in order to see if are qualified to join a future malaria study.

Objective

To screen healthy volunteers to see if they are eligible to join investigational malaria studies. The studies will be trials of investigational antimalarial drugs, malaria vaccines, or prevention regimens. They may also involve controlled human malaria infection trials.

Eligibility

Healthy people ages 18 50

Design

Participants will first be prescreened by phone.

Participants will be screened with:

Medical history

Physical exam

Blood and urine tests

Participants may go more than 1 year without joining a clinical trial. If this happens, they may be re-contacted to see if they still want to be part of this screening protocol. Those who still want to participate and have had relevant medical changes will be rescreened.

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Eligibility

• INCLUSION CRITERIA:

All of the following criteria must be fulfilled for a subject to participate in this trial:

1. Age greater than or equal to 18 and less than or equal to 50 years.
2. In good general health and without clinically significant medical history
3. Reliable access to the clinical trial center and available in the area for more than 1 year
4. Females of childbearing potential must be willing to undergo periodic pregnancy testing and use reliable contraception per protocol when enrolled into LMIV clinical trials (protocol-specific requirements)

EXCLUSION CRITERIA:

        A subject will be excluded from participating in this trial if any one of the following
        criteria is
        fulfilled:
          1. Pregnant, breastfeeding, or planned pregnancy in the upcoming year.
          2. Hemoglobin, white blood cell (WBC), platelets, alanine transaminase (ALT), and
             creatinine (Cr) outside of local lab normal range (subjects may be included at the
             investigator s discretion for not clinically significant values outside of normal
             range).
          3. Anticipated use during the study period, or use within the following periods prior to
             enrollment:
               1. Investigational malaria vaccine within the last five years
               2. Chronic systemic immunosuppressive medications (e.g., cytotoxic medications,
                  oral/parental corticosteroids > 0.5 mg/kg/day prednisone or equivalent).
                  Corticosteroid nasal spray for allergic rhinitis and topical corticosteroids for
                  mild, uncomplicated dermatitis are allowed.
               3. Recurrent receipt of blood products or immunoglobulins
          4. History of:
               1. Sickle cell disease
               2. Splenectomy or functional asplenia
               3. Systemic anaphylaxis
               4. Uncontrolled psoriasis or porphyria
          5. Clinically significant medical condition, physical examination findings, other
             clinically significant abnormal laboratory results, or past medical history that may
             have clinically significant implications for current health status and participation
             in the study in the opinion of the Investigator. A clinically significant condition or
             process includes but is not limited to:
               1. A process that would affect the immune response, or requires medication that
                  affects the immune response.
               2. Any contraindication to repeated phlebotomy.
          6. History of or known active cardiac disease including:
               1. prior myocardial infarction (heart attack)
               2. angina pectoris
               3. congestive heart failure
               4. valvular heart disease
               5. cardiomyopathy
               6. pericarditis
               7. stroke or transient ischemic attack
               8. exertional chest pain or shortness of breath
               9. other heart conditions under the care of a doctor
          7. Infection with HIV, hepatitis B, and/or hepatitis C
          8. Psychiatric condition that precludes compliance with the protocol including but not
             limited to:
               1. Psychosis within the past 3 years
               2. Ongoing risk for suicide, or history of suicide attempt or gesture within the
                  past 3 years
          9. Suspected or known current alcohol or drug abuse as defined by the American
             Psychiatric Association in the Diagnostic and Statistical Manual of Mental Disorders,
             Fifth Edition at the discretion of the PI
         10. Any other finding that, in the judgment of the Investigator, would interfere with, or
             serve as a contraindication to, protocol adherence, assessment of safety or
             reactogenicity, or a subject s ability to give informed consent, or increase the risk
             of having an adverse outcome from participating in the study