Naval Medical Research Unit Three
A United States Navy biomedical research unit focused on infectious diseases, outbreak surveillance, and military public-health support.
Last updated October 14, 2026
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Overview
Naval Medical Research Unit Three, commonly known as NAMRU-3, is a United States Navy biomedical research laboratory and overseas military medical research organization. Its work centers on infectious diseases that affect deployed military personnel and populations in regions covered by United States Central Command, European Command, and Africa Command. The unit conducts laboratory, epidemiological, clinical, and public-health research, while also supporting disease surveillance, outbreak investigations, diagnostic capacity, and scientific training in partner countries. NAMRU-3 originated in Egypt during the Second World War. In 1942, American military scientists and technicians working with the United States Typhus Commission established a laboratory beside Abbassia Fever Hospital in Cairo. The laboratory was created to help control typhus and other epidemic threats during and after the war. Following the conflict, the Egyptian government invited the United States Navy to continue research into epidemic and endemic diseases, and the Secretary of the Navy formally established NAMRU-3 in 1946 in the former Typhus Commission facilities. It remained in Cairo for decades and became one of the most prominent biomedical research laboratories serving North Africa and the Middle East. The unit's research portfolio has included malaria, leishmaniasis, dengue and other arboviral diseases, West Nile fever, Rift Valley fever, influenza, meningitis, hepatitis, tuberculosis, HIV, schistosomiasis, brucellosis, cholera, enteric infections, rickettsial diseases, and travelers' diarrhea. Its military relevance comes from the high operational burden of many of these illnesses in tropical and subtropical deployment environments, particularly diseases for which commercial pharmaceutical investment has historically been limited. NAMRU-3 has therefore investigated vaccines, prophylactic medicines, diagnostic methods, treatment strategies, antimicrobial resistance, and disease-transmission mechanisms. NAMRU-3 also operates as a public-health partner. Through relationships with ministries of health, the World Health Organization, the United States National Institutes of Health, the Centers for Disease Control and Prevention, and the United States Agency for International Development, it has supported infectious-disease surveillance and outbreak response. The unit has participated in investigations across Africa, the Middle East, Central Asia, and other regions, and has helped partner laboratories develop epidemiological and molecular-biology capabilities. Its collaborations are designed to benefit both military readiness and civilian public health by improving early detection of emerging threats and strengthening local diagnostic infrastructure. The organization has held important reference and accreditation roles. It became a World Health Organization Collaborating Center for HIV/AIDS in 1987 and was later recognized as a WHO Collaborating Center for emerging and re-emerging infectious diseases. It has also served as a WHO reference laboratory for influenza and meningitis in the Eastern Mediterranean Region. Its infectious-disease clinical diagnostics laboratory became the first overseas Department of Defense research laboratory to receive College of American Pathologists accreditation. Its animal-research facility has received AAALAC International accreditation, and its biosafety infrastructure has included a Biosafety Level 3 laboratory. NAMRU-3's Cairo operation continued through severe political disruption, including the interruption of United States-Egyptian diplomatic relations from 1967 to 1973. During that period, Egyptian personnel maintained laboratory operations while supplies were routed through the Spanish Embassy. The unit later expanded through detachments and collecting stations in Ethiopia, Sudan, Ghana, and Djibouti. In 1998, it became part of the reorganized Naval Medical Research Center. The Cairo laboratory was subsequently relocated to Naval Air Station Sigonella in Italy, where NAMRU-3 continues its regional research and surveillance mission. Its present activities include avian-influenza surveillance, febrile-illness monitoring, travelers' diarrhea research, malaria vaccine and drug-resistance studies, investigation of multidrug-resistant hospital pathogens, and international outbreak response.
History
NAMRU-3 traces its origins to a wartime infectious-disease laboratory established in Cairo in 1942 by the United States Typhus Commission. American military scientists and technicians worked beside Abbassia Fever Hospital with Egyptian medical personnel to contain typhus and other epidemic risks affecting Cairo during and after the Second World War. In 1946, following an invitation from the Egyptian government, the Secretary of the Navy formally created Naval Medical Research Unit Three in the same facilities. Its initial program addressed diseases including brucellosis, cholera, meningitis, schistosomiasis, smallpox, and tick-borne infections. The unit developed a broad scientific role in the following decades. In 1949, Harry Hoogstraal established its Department of Medical Zoology and built an extensive tick collection, eventually covering almost 600 species from more than 160 countries. In 1962, NAMRU-3 researchers contributed to understanding the natural transmission cycle of West Nile fever involving birds and mosquitoes. Cooperation with the World Health Organization during the early 1970s supported work on typhoid and Group A meningococcal meningitis vaccines. The laboratory also became an important center for research into tropical and subtropical diseases affecting both local communities and deployed military personnel. NAMRU-3 expanded geographically through detachments and collecting stations. An Addis Ababa detachment and a collecting station at Gambela, Ethiopia, opened in 1965; the Ethiopian operation later became NAMRU-5 in 1974. A Sudanese detachment followed in the early 1970s, concentrating on malaria and leishmaniasis. Joint malaria work with Ghana began in 1995, and a Ghana detachment was established in 2001 to help prepare local skills and facilities for malaria vaccine trials. A detachment at Camp Lemonnier, Djibouti, was created in 2007 for diarrheal-disease surveillance. The laboratory's continuity was tested by the break in U.S.-Egyptian relations beginning in 1967. Most American diplomats left Egypt, but an Egyptian co-director and Egyptian staff maintained the laboratory's functions and research. Supplies were obtained through the Embassy of Spain, and the commanding officer was permitted to return after several months. The facility therefore remained active during a seven-year interruption in bilateral relations, reinforcing its role as a long-standing scientific bridge between the two countries. Infrastructure grew significantly in the 1980s, when a six-story biosciences building costing approximately $10 million was constructed on the Cairo site. During the 1990s, researchers contributed to studies of travelers' diarrhea, including work on norfloxacin prophylaxis and ciprofloxacin and loperamide treatment. The 1999 creation of the Department of Defense Global Emerging Infections System broadened the unit's mandate beyond laboratory research toward surveillance, outbreak response, and public-health capacity building. From 2001 through 2011, NAMRU-3 conducted 69 outbreak investigations in 25 countries. NAMRU-3 earned international recognition for its diagnostic, research, and training capabilities. It became a WHO Collaborating Center for HIV/AIDS in 1987 and was subsequently recognized for work on emerging and re-emerging infectious diseases. It has served as a WHO reference laboratory for influenza and meningitis in the Eastern Mediterranean Region. The unit's infectious-disease clinical diagnostics laboratory was the first overseas Department of Defense laboratory to receive College of American Pathologists accreditation. Its animal-research facilities received AAALAC International accreditation, and the organization maintained one of the region's limited Biosafety Level 3 laboratories. In 1998, NAMRU-3 became part of the reorganized Naval Medical Research Center. Its later mission has combined basic science, epidemiology, clinical investigation, military health surveillance, and partner-nation support. Research has addressed malaria vaccines and drug-resistant Plasmodium falciparum, avian and pandemic influenza, febrile illness, travelers' diarrhea, multidrug-resistant hospital bacteria, arboviruses, parasitic diseases, and other infections relevant to operational readiness. The Cairo facility was eventually relocated to Naval Air Station Sigonella in Italy. From its current base, NAMRU-3 continues to work with military, governmental, academic, and international health partners across the Mediterranean, Middle East, Africa, Europe, and Central Asia.
- 2007
Djibouti detachment established
[1]A Camp Lemonnier detachment began supporting diarrheal-disease surveillance.
- 2001
WHO emerging-infections recognition and Ghana detachment
[1]The unit was recognized as a WHO Collaborating Center for emerging and re-emerging infectious diseases and established a Ghana detachment for malaria research.
- 2000
Rift Valley fever outbreak investigated in Yemen
[1]NAMRU-3 investigated the first reported Rift Valley fever outbreak outside Africa in Yemen.
- 1999
Global emerging-infections mandate expanded
[1]The Department of Defense Global Emerging Infections System expanded the unit's public-health surveillance and capacity-building responsibilities.
- 1998
Integrated into the Naval Medical Research Center
[1]NAMRU-3 became part of the reorganized Naval Medical Research Center.
- 1987
Named a WHO HIV/AIDS Collaborating Center
[1]The World Health Organization designated NAMRU-3 as a Collaborating Center for HIV/AIDS.
- 1983
New Cairo biosciences building completed
[1]A six-story biosciences building was constructed at the Cairo laboratory.
- 1965
Ethiopian detachment opened
[1]NAMRU-3 opened an Addis Ababa detachment and a collecting station at Gambela.
- 1962
West Nile fever transmission cycle described
[1]NAMRU-3 investigators described the role of mosquitoes and birds in the natural infection cycle of West Nile fever.
- 1949
Department of Medical Zoology founded
[1]Harry Hoogstraal founded the department and began developing an internationally significant tick collection.
Products and positioning
A U.S. Navy overseas research and public-health organization linking military medical readiness with international infectious-disease surveillance, laboratory science, and partner-nation capacity building.
Public-health research
Infectious-disease surveillance
NAMRU-3 monitors emerging and re-emerging infectious threats affecting military personnel and civilian populations. Surveillance has included avian influenza, febrile illness, travelers' diarrhea, malaria, meningitis, and diseases occurring among personnel deployed to operational locations.
Biomedical research · 1946
Tropical-disease research
The unit studies tropical and subtropical viral, bacterial, parasitic, and rickettsial diseases, including malaria, leishmaniasis, dengue, West Nile fever, Rift Valley fever, enteric infections, and other conditions important to military operations and regional health systems.
Clinical laboratory services
Laboratory diagnostics and reference services
NAMRU-3 provides infectious-disease diagnostic research and reference-laboratory support. Its capabilities have included influenza and meningitis reference work for the WHO Eastern Mediterranean Region, accredited clinical diagnostics, biosafety infrastructure, and laboratory surge support during outbreaks.
Medical countermeasure research
Vaccine and prophylaxis research
Research programs investigate vaccines, preventive medicines, and treatment approaches for diseases that can cause substantial illness among deployed personnel, including malaria, leishmaniasis, arboviral infections, and bacterial causes of travelers' diarrhea.
Marketing campaigns
- 2007Camp Lemonnier diarrheal-disease surveillance
Djibouti · Horn of Africa
A NAMRU-3 detachment at Camp Lemonnier supported surveillance of diarrheal disease among deployed populations.
Outcome. The detachment extended the unit's operational-health surveillance into the Horn of Africa.
- 2001Ghana malaria research partnership
Ghana
NAMRU-3 established a Ghana detachment after beginning joint malaria research with Ghana in 1995, with emphasis on preparing facilities and expertise for malaria vaccine trials.
Outcome. The partnership strengthened local malaria research and clinical-trial capacity.
- 1999Global Emerging Infections System activities
Africa · Middle East · Central Asia
Through the Department of Defense Global Emerging Infections System, NAMRU-3 expanded surveillance, outbreak response, and laboratory-capacity programs with host-country and international partners.
Outcome. The program broadened NAMRU-3 from a Cairo-based research laboratory into a regional public-health and military surveillance organization.
Brand decisions
2007
Expansion into Djibouti operational surveillanceStrategyBackground
U.S. military operations in the Horn of Africa created a need for local monitoring of infectious diseases affecting deployed personnel.
Action taken
NAMRU-3 established a Camp Lemonnier detachment focused on diarrheal-disease surveillance.
Aftermath
The unit gained a forward presence for operational medical surveillance in Djibouti.
1998
Integration into the Naval Medical Research CenterStrategyBackground
The U.S. Navy reorganized its medical research structure and incorporated NAMRU-3 into the Naval Medical Research Center.
Action taken
NAMRU-3 was placed within the Naval Medical Research Center while retaining its overseas infectious-disease mission.
Aftermath
The unit continued regional research and public-health activities as part of the Navy's broader medical-research network.
Recent events
- 2000
NAMRU-3 investigated a Rift Valley fever outbreak in Yemen[1]
Other
The unit investigated the first reported outbreak of Rift Valley fever outside Africa in Yemen.
- 1998
NAMRU-3 joined the reorganized Naval Medical Research Center[1]
Other
The unit became part of the reorganized Naval Medical Research Center, integrating it into the Navy's broader medical-research structure.
- 1967
NAMRU-3 continued operations during the U.S.-Egyptian diplomatic rupture[1]
Other
After diplomatic relations were suspended, Egyptian staff continued operating the laboratory with logistical support routed through the Spanish Embassy.
- 1962
NAMRU-3 research described the natural cycle of West Nile fever[1]
Other
Investigators identified the mosquito-and-bird transmission cycle associated with West Nile fever.
- 1946
NAMRU-3 established as a formal U.S. Navy research unit[1]
Other
The U.S. Navy formally established NAMRU-3 in Cairo after wartime infectious-disease work conducted by the U.S. Typhus Commission.
Sources2 sources
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