B-virus and free-ranging macaques, Puerto Rico.
In Puerto Rico, risk for transmission of B-virus from free-ranging rhesus monkeys to humans has become a serious challenge. An incident with an injured rhesus monkey, seropositive seropositive /se·ro·pos·i·tive/ (-poz´i-tiv) showing positive results on serological examination; showing a high level of antibody.
adj. for B-virus, resulted in inappropriate administration of antiviral postexposure prophylaxis. This incident underscores the importance of education about risks associated with interactions between humans and nonhuman primates.
Two species of introduced nonhuman primates currently thrive on the Commonwealth of Puerto Rico: rhesus macaques (Macaca Macaca
genus of Old World monkeys very popular in zoos and for some aspects of human laboratory medicine. See macaque. mulatta) and patas monkeys (Erythrocebus patas) (1). Although most of the monkeys live in groups in the southwest region of Puerto Rico, recent events might indicate that the primates have spread to the rest of the island, including urban areas.
Both species originated from the La Parguera Primate Facility, which was administered by the Caribbean Primate Research Center of the University of Puerto Rico's Medical Sciences Campus from 1961 until 1982 (2). Primates were introduced onto two peninsulas, Isla Cueva and Isla Guayacan, off the southwest coast of Puerto Rico, near Guanica (Figure). In 1974, the Center, through a contract with the Food and Drug Administration, began to increase the number of breeding female rhesus monkeys to supply animals for the Sabin Sa·bin , Albert Bruce 1906-1993.
American microbiologist and physician who developed a live-virus vaccine against polio (1957), replacing the killed-virus vaccine invented by Jonas Salk. Poliomyelitis Virus Vaccine Program. Throughout the 1970s, the rhesus colony numbers were increased to >1,000 (3,4). Patas monkeys were introduced to the peninsulas between 1971 and 1981. During this time, an unknown number of monkeys of both species escaped into the regions of Sierra Bermeja, Lajas, Cabo Rojo, and San German. La Parguera Primate Facility ceased operating in 1982, and the monkeys were removed from the facility. However, during the last 20 years, the escapees and their progeny have continued to cause problems in the area, plaguing farmers and concerning public health and environmental officials. Recently, an automobile in an urban area near San Juan (approximately 100 km from La Parguera) bit an adult rhesus monkey. During the incident, a number of emergency personnel were exposed to the monkey's body fluids. The monkey subsequently tested positive for antibodies to B-virus (Cercopithecine herpesvirus herpesvirus, any of the family (Herpesviridae) of common DNA-containing viruses, many of which are associated with human disease. See cytomegalovirus; Epstein-Barr virus; herpes simplex; herpes zoster. 1).
B-virus is an alphaherpesvirus enzootic en·zo·ot·ic
Prevalent among or restricted to animals of a specific geographic area. Used of a disease.
An enzootic disease.
peculiar to or present constantly in a location. See also endemic. among primates of the genus Macaca (e.g., rhesus, cynomolgus, pigtailed pig·tail
1. A plait of braided hair.
2. A twisted roll of tobacco.
3. See flamingo flower.
pig ). First documented in 1932, this virus has received considerable attention because rhesus macaques are a species commonly used in research. Data indicate that 74%-100% of adult rhesus monkeys are seropositive for the virus (5,6). In 1997, a survey of 57 rhesus monkeys in southwest Puerto Rico found that 41 (72%) had serologic evidence of B-virus infection (unpub. data).
Similar to herpes simplex infection in humans, B-virus infection might be asymptomatic or associated with mild lesions or conjunctivitis conjunctivitis (kənjəngtəvī`təs), inflammation or infection of the mucosal membrane that covers the eyeball and lines the eyelid, usually acute, caused by a virus or, less often, by a bacillus, an allergic reaction, or an in macaques (7). Whereas the effects of the virus are mild in macaque macaque (məkäk`), name for Old World monkeys of the genus Macaca, related to mangabeys, mandrills, and baboons. All but one of the 19 species are found in Asia from Afghanistan to Japan, the Philippines, and Borneo. hosts, it causes a serious and frequently fatal disease in other primates, including humans. Once transmitted to a human, B-virus infection has a nearly 80% case-fatality rate. To date, <50 human infections have been reported in the literature since infection was first recognized in 1932, despite the multitude of exposures occurring primarily in laboratory environments (7,8). A survey of laboratory workers indicated that asymptomatic seroconversion is unlikely (9). Most transmissions have occurred through monkey bites or scratches, but cases have been documented from needlestick injuries or other laboratory-related accidents, cage scratches, or mucous membrane exposure to monkey body fluids. One isolated case of human-to-human transmission occurred after a woman applied ointment to her husband's infected wound (10). B-virus infection should be recognized early and antiviral prophylaxis given promptly. Early signs of infection in humans include influenzalike symptoms, such as headache, nausea, vomiting, and muscle pain. Vesicular vesicular /ve·sic·u·lar/ (ve-sik´u-ler)
1. composed of or relating to small, saclike bodies.
2. pertaining to or made up of vesicles on the skin.
3. herpetic lesions, pain, or itching might arise around the area of exposure. The disease progresses quickly to a fulminating fulminating
see fulminant disease. meningoencephalitis meningoencephalitis /me·nin·go·en·ceph·a·li·tis/ (me-ning?go-en-sef?ah-li´tis) inflammation of the brain and meninges.
toxoplasmic meningoencephalitis . Symptoms include paralysis (often progressive and ascending), numbness, ataxia ataxia (ətăk`sēə), lack of coordination of the voluntary muscles resulting in irregular movements of the body. Ataxia can be brought on by an injury, infection, or degenerative disease of the central nervous system, e.g. , respiratory difficulties, urinary retention, altered consciousness, and coma. The few cases that have been treated by the time neurologic symptoms have emerged have had limited success (5).
Like other herpesviruses Herpesviruses
A family of viruses responsible for cold sores, chicken pox, and genital herpes.
Mentioned in: Skin Resurfacing , latency is a feature of B-virus, and many macaques will harbor the virus in trigeminal trigeminal /tri·gem·i·nal/ (tri-jem´i-n'l)
2. pertaining to the trigeminal (fifth cranial) nerve.
3. pertaining to trigeminy.
adj. and lumbosacral ganglia. Stress will increase the likelihood that the virus will be reactivated and shed. Illness, transport, breeding, or environmental stresses have been reported as factors increasing a macaque's likelihood of shedding the virus and therefore becoming infectious. Typically, a very low percentage (2% 3%) of seropositive monkeys will shed the virus at any given time (5). Risk for transmission, therefore, remains quite low.
In February 2002, a total of 25 emergency personnel were exposed to fluids from an injured adult male rhesus monkey that had been struck by an automobile in Bayamon, Puerto Rico. Most persons (n = 22) reported direct contact with the monkey's blood, and none were bitten or scratched by the monkey. B-virus is not a bloodborne pathogen and is not transmitted by blood. However, the possibility of contact with other body fluids that represent a risk for B-virus transmission (e.g., saliva) could not be ruled out in four persons. All 25 persons were interviewed and evaluated by Puerto Rico's Worker's Compensation Agency and placed on prophylactic antiviral medication. All persons were employees from various municipal agencies responding to the accident. None wore latex gloves of other protective gear, despite the fact that most of the persons (84%) had access to personal protective equipment, including latex gloves, masks, and protective eyewear. Current protocols emphasize that the first few minutes after an injury of exposure are the most important (7). In this case, 1 person (4%) washed the exposed area within 1 to 2 minutes of exposure; 11 (44%) waited >5 minutes, 4 (16%) >30 minutes, and 9 (36%) waited >1 hour to clean the exposed area. Most persons used soap and water for cleansing; whether detergents or disinfectants were used is unknown. All 25 persons indicated that they were unaware of potential health risks involved in handling a primate of a rhesus monkey in particular. All were unaware of B-virus. None had been instructed to use protective equipment when handling a monkey. Subsequently, the rhesus monkey tested positive for antibodies to B-virus with enzyme-linked immunosorbent assays (ELISA ELISA (e-li´sah) Enzyme-Linked Immuno-Sorbent Assay; any enzyme immunoassay using an enzyme-labeled immunoreactant and an immunosorbent.
n. ). Paired serologic samples, completed at weeks 0 and 5 on all 25 persons, were negative for evidence of human infection by B-virus. The center's Virology virology, study of viruses and their role in disease. Many viruses, such as animal RNA viruses and viruses that infect bacteria, or bacteriophages, have become useful laboratory tools in genetic studies and in work on the cellular metabolic control of gene expression Laboratory performed the initial ELISA test for the blood sample from the monkey and also confirmed the positive result by sending aliquots of the sample to two independent laboratories (antibodies against B-virus were confirmed by Western Blot [B Virus Resource Laboratory, Atlanta, GA] and by ELISA [BioReliance Corporation, Rockville, MD]).
For 70 years, considerable effort has been undertaken to understand the epidemiology of B-virus to decrease risk for human exposures in research laboratory settings. In the United States, several exposures have resulted from pet macaques (8); however, most B-virus exposures occur inside the laboratory. Work continues to create specific pathogen-free rhesus colonies for research; in the meantime Adv. 1. in the meantime - during the intervening time; "meanwhile I will not think about the problem"; "meantime he was attentive to his other interests"; "in the meantime the police were notified"
meantime, meanwhile , laboratory personnel are kept well informed and every attempt is made to avoid transmission. Detailed protocols have been developed outlining recommended procedures for human exposure to macaques. Laboratory personnel depend on well-educated healthcare providers that can provide a prompt and knowledgeable management after potential exposures.
Puerto Rico health officials face a novel challenge: free-ranging rhesus monkeys in contact with a largely unaware public. Although the risk for B-virus transmission might be expected to be relatively low, as the monkeys continue to expand their range and population, further encounters with humans should be expected. Rough estimates suggest 500 macaques might be living in southwest Puerto Rico. Data indicate that rhesus populations typically increase their population by approximately 15% each year provided food is available (11).
In southwest Puerto Rico, crop predation is an ongoing problem. Farmers have implemented various tactics to protect their crops, including electric fences, dogs, and possibly hunting or trapping the macaques. Agricultural damage can be considerable after a group moves through a field. Reports document that persons are trapping monkeys, presumably pre·sum·a·ble
That can be presumed or taken for granted; reasonable as a supposition: presumable causes of the disaster. for illegal sale as exotic pets. During a 1993 census, multiple traps were found set up in the forest (Janis Gonzalez, unpub, data). This finding is alarming, not only from a legal but also from a public health perspective. Trapping and confinement could potentially stress an animal enough to initiate reactivation reactivation
to become active after a period of quiescence or, as in bacterial and viral infections, latency.
cross reactivation of latent virus. Inexperienced handlers are at increased risk for a bite or scratch, and fear of legal implications might prevent a person from reporting or seeking medical attention for such injuries. Healthcare providers inexperienced with primates and associated zoonotic diseases might be largely unaware or unfamiliar with B-virus.
Control of the free-ranging, nonhuman primate population promises to be a challenging task. Other examples of introduced primates in the Caribbean offer little consolation. The island of Desecheo is one example; it is located in the Mona Passage between Puerto Rico and Hispaniola (an island divided between Haiti and the Dominican Republic). In 1966, to study adaptation processes, a total of 57 rhesus macaques were released onto the remote 1.2-[km.sup.2] island. The monkeys adapted well, and after nesting bird populations dropped substantially on the island, government officials decided to remove the rhesus population (12). Thirty-six years later, after numerous trapping attempts, rhesus macaques still inhabit the island, a National Wildlife Refuge National Wildlife Refuge . Barbados suffers similar problems with an introduced species, the African green monkey (Cercopithecus aethiops sabaeus). This species was introduced >300 years ago with the slave trade. A study completed in 1994 indicated that despite trapping and removing more than 10,000 monkeys for 14 years, the population still increased by 4.5%; agricultural damage from the monkeys increased almost 30% during the same time span (13).
Although government agencies and other organizations continue to discuss interventions to address the free-ranging population of monkeys, the Puerto Rico Department of Health has begun the process of public education. Informational bulletins for government employees will stress the importance of using personal protective equipment when handling a nonhuman primate and what to do in case of an exposure to a rhesus monkey. In addition, every emergency room will receive a protocol for evaluation and management of exposed persons.
The persons exposed in the incident in Bayamon suffered a low-risk exposure. While the macaque was seropositive for B-virus, most the persons involved were only aware of exposure to blood; no bites or scratches occurred. Exposure to a macaque's blood does not constitute an exposure to B-virus because viremia viremia /vi·re·mia/ (vi-re´me-ah) the presence of viruses in the blood.
The presence of viruses in the bloodstream. is thought to be rare among infected macaques (14). Nonetheless, 25 persons were needlessly exposed to fluids from a rhesus, postexposure cleaning was deficient for most persons, and all received an antiviral drug. Prevention of exposure and the unnecessary use of postexposure prophylaxis can be minimized through educational efforts to promote the use of personal protective equipment among first responders and through a better understanding of what body fluids constitute a risk for transmission of B-virus. Furthermore, the general public needs to be aware of this risk and report close contacts with monkeys to health authorities. Other emerging infections, such as monkeypox, underscore the need to remain vigilant against zoonoses Zoonoses
Infections of humans caused by the transmission of disease agents that naturally live in animals. People become infected when they unwittingly intrude into the life cycle of the disease agent and become unnatural hosts. .
We gratefully acknowledge Gladys Rodriguez Perez and Nidia Rovira for their valuable contributions to this public health investigation.
These studies were partially supported by P40 grant RR03640 awarded to Caribbean Primate Research Center by the National Center for Research Resources The National Center for Research Resources or NCRR, is a United States government agency. NCRR provides funding to laboratory scientists and researchers for facilities and tools in the goal of curing and treating diseases. (National Institutes of Health).
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(2.) Vandenbergh JG The La Parguera, Puerto Rico Colony: establishment and early studies. P R Health Sci J 1989;8:117-9.
(3.) Phoebus EC, Roman A, Herbert HJ. The FDA FDA
Food and Drug Administration
n.pr See Food and Drug Administration.
n.pr the abbreviation for the Food and Drug Administration. rhesus breeding colony at La Parguera, Puerto Rico. P R Health Sci J 1989;8: 157-8.
(4.) Taub DM, Mehlman P. Development of the Morgan Island rhesus monkey colony. P R Health Sci J 1989;8:159-69.
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(6.) Orcutt RP, Pucak GJ, Foster HL, Kilcourse JT, Ferrell T. Multiple testing for the detection of B virus antibody in specially handled rhesus monkeys after capture from virgin trapping grounds. Lab Anim Sci 1976;26:70M.
(7.) Cohen cohen
(Hebrew: “priest”) Jewish priest descended from Zadok (a descendant of Aaron), priest at the First Temple of Jerusalem. The biblical priesthood was hereditary and male. JI, Davenport DS, Stewart JA, Deitchman S, Hilliard JK, Chapman LE. B Virus Working Group. Recommendations for prevention of and therapy for exposure to B virus (cercopithecine herpesvirus 1). Clin Infect Dis 2002;35:1191 203.
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(9.) Freifeld AG, Hilliard J, Southers J, Murray M, Saverese B, Schmitt JM, et al. A controlled seroprevalence seroprevalence Immunology The proportion of a population that is seropositive–ie, has been exposed to a particular pathogen or immunogen; the seropositivity of a population is calculated as the number of individuals who produce a particular antibody divided survey of primate handlers for evidence of asymptomatic herpes B virus B Virus( Cercopithecine herpesvirus 1, herpesvirus simiae, Herpes B virus) is the endemic simplexvirus of macaques, in which the virus exhibits pathogenesis similar to that of herpes simplex virus in humans. infection. J Infect Dis 1995;171:1031-4.
(10.) Centers for Disease Control and Prevention Centers for Disease Control and Prevention (CDC), agency of the U.S. Public Health Service since 1973, with headquarters in Atlanta; it was established in 1946 as the Communicable Disease Center. . Epidemiologic notes and reports B-virus infection in humans--Pensacola, Florida. MMWR MMWR Morbidity & Mortality Weekly Report Epidemiology A news bulletin published by the CDC, which provides epidemiologic data–eg, statistics on the incidence of AIDS, rabies, rubella, STDs and other communicable diseases, causes of mortality–eg, Morb Mortal Wkly Rep 1987;36:289-90, 295 6.
(11.) Drickamer LC. A ten-year summary of reproductive data for free-ranging Macaca mulatta. Folia fo·li·a
Plural of folium. Primatol (Basel) 1974;21:61-80.
(12.) Evans MA. Ecology and removal of introduced rhesus monkeys: Desecheo Island National Wildlife Refuge, Puerto Rico. P R Health Sci J 1989;8:139-56.
(13.) Boulton AM, Horrocks JA, Baulu J. The Barbados vervet monkey vervet monkey
Any of several African races of slim, arboreal, diurnal Old World monkeys of the guenon species Cercopithecus aethiops and C. pygerythrus (family Cercopithecidae). They have large cheek pouches. (Cercopithecus aethiops sabaeus): changes in population size and crop damage 1980-1994. Int J Primatol 1996;17:831-44.
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The opinions expressed by authors contributing to this journal do not necessarily reflect the opinions of the Centers for Disease Control and Prevention or the institutions with which the authors are affiliated.
Kristen Jensen, * Francisco Alvarado-Ramy, ([double dagger]) Janis Gonzalez-Martinez, ([section]) Edmundo Kraiselburd, ([section]) and Johnny Rullan ([double dagger])
* Cornell University, Ithaca, New York
For other places or objects named Ithaca, see Ithaca (disambiguation). , USA; ([dagger]) Centers for Disease Control and Prevention, Atlanta, Georgia, USA; ([double dagger]) Puerto Rico Department of Health, San Juan, Puerto Rico San Juan (IPA: [saŋ hwaŋ]) (from the Spanish San Juan Bautista, "Saint John the Baptist") is the capital and largest municipality on Puerto Rico. ; and ([section]) Caribbean Primate Research Center, Sabana Seca, Puerto Rico
Dr. Jensen practices at a small animal clinic in Key West, Florida “Key West” redirects here. For other uses, see Key West (disambiguation).
Key West is a city and an island of the same name near the southernmost tip of the Florida Keys in Monroe County, Florida, United States. . Her research interests include infectious diseases and zoonotic Zoonotic
A disease which can be spread from animals to humans.
Mentioned in: Zoonosis public health issues.
Address for correspondence: Francisco Alvarado-Ramy, Puerto Rico Department of Health, Casia St. #2, San Juan, PR 00921-3200, USA; fax: 787-773-0622; email: email@example.com