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B-virus (Cercopithecine herpesvirus 1) infection in humans and macaques potential for zoonotic disease. (Synopsis).



Nonhuman primates are widely used in biomedical research because of their genetic, anatomic, and physiologic similarities to humans. In this setting, human contact directly with macaques or with their tissues and fluids sometimes occurs. 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), an alphaherpesvirus endemic in Asian macaques, is closely related to herpes simplex virus Herpes simplex virus
A virus that can cause fever and blistering on the skin, mucous membranes, or genitalia.

Mentioned in: Conjunctivitis


herpes simplex virus
 (HSV (Hue Saturation Value) A color space similar to HSB. See HSB.

HSV - hue, saturation, value
). Most macaques carry B virus without overt signs of disease. However, zoonotic Zoonotic
A disease which can be spread from animals to humans.

Mentioned in: Zoonosis
 infection with B virus in humans usually results in fatal encephalomyelitis encephalomyelitis /en·ceph·a·lo·my·eli·tis/ (en-sef?ah-lo-mi?e-li´tis) inflammation of the brain and spinal cord.

acute disseminated encephalomyelitis
 or severe neurologic impairment. Although the incidence of human infection with B virus is low, a death rate of >70% before the availability of antiviral therapy makes this virus a serious zoonotic threat. Knowledge of the clinical signs and risk factors for human B-virus disease allows early initiation of antiviral therapy and prevents severe disease or death.

**********

Of the 35 herpesviruses Herpesviruses
A family of viruses responsible for cold sores, chicken pox, and genital herpes.

Mentioned in: Skin Resurfacing
 identified in nonhuman primates, only Cercopithecine herpesvirus 1 (B virus) is known to be pathogenic for humans. Monkeys of the genus Macaca Macaca

genus of Old World monkeys very popular in zoos and for some aspects of human laboratory medicine. See macaque.
, which are widely used as animal models for biomedical research, naturally carry B virus. Infection in macaques is lifelong, with periodic, usually asymptomatic reactivation reactivation

to become active after a period of quiescence or, as in bacterial and viral infections, latency.


cross reactivation
.

Approximately 40 cases of zoonotic B-virus infection have been reported. Considering the number of people in contact with macaques, this number of cases is quite low. However, the death rate for B-virus infection before the availability of antiviral therapy was >70%. Neurologic sequelae sequelae Clinical medicine The consequences of a particular condition or therapeutic intervention  are common in survivors. Treatment with antiviral medication may decrease the death rate, but rapid diagnosis and initiation of therapy are essential in controlling the spread of the virus in the central nervous system and limiting neurologic sequelae.

Discovery of B Virus

The first documented case of human B-virus infection occurred in 1932 when a researcher (patient W.B.) was bitten on the hand by an apparently healthy rhesus macaque (Macaca mulatta) and died of progressive encephalomyelitis 15 days later. Two research groups obtained samples from patient W.B.: Gay and Holden and 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.
 and Wright (1,2). Both groups demonstrated a similar disease progression in rabbits inoculated with nerve tissue from patient W.B. and characterized the agent as a herpesvirus. Neither group was able to produce disease in rhesus macaques, presumably pre·sum·a·ble  
adj.
That can be presumed or taken for granted; reasonable as a supposition: presumable causes of the disaster.
 because the monkeys were already naturally infected with what Sabin's group named B virus (after patient W.B.).

The familiar term B virus will be used throughout this article. Many other accepted terms for this virus exist, including Herpesvirus simiae, herpes B, monkey B virus Monkey B Virus (Cercopithecine herpesvirus 1, herpesvirus simiae, (B virus)) is a rare but highly lethal alphaherpesvirus that can be fatal to humans when spread from macaque monkeys. , and herpesvirus B. The International Committee on the Taxonomy of Viruses uses the name Cercopithecine herpesvirus 1 (family: Herpesviridae, subfamily subfamily /sub·fam·i·ly/ (sub´fam-i-le) a taxonomic division between a family and a tribe.

sub·fam·i·ly
n.
A taxonomic category ranking between a family and a genus.
: Alphaherpesvirinae, genus: Simplexvirus). This designation is based on virologic characteristics and serologic se·rol·o·gy  
n. pl. se·rol·o·gies
1. The science that deals with the properties and reactions of serums, especially blood serum.

2.
 cross-reactivity with other members of the genus Simplexvirus, namely HSV type 1 (HSV-1), the causative agent of oral herpetic ulcers (cold sores) in humans and HSV type 2 (HSV-2), the agent of human genital herpes (3).

Structure and Life Cycle

B virus is a large, double-stranded DNA virus with numerous open reading frames, some of which share approximately 79% amino acid sequence identity with HSV-1 and HSV-2 (4). The viral genome is G+C rich (75% G+C), the highest of any known herpesvirus (4). The B-virus genome is only partially sequenced, but thus far, is colinear co·lin·e·ar  
adj.
1. Containing elements that correspond to one another and that are arranged in the same linear sequence.

2. Collinear.



co·lin
 with that of HSV (5). Electron micrograph studies of B virus show a typical herpesvirus structure (6), including an electron dense core with viral DNA DNA: see nucleic acid.
DNA
 or deoxyribonucleic acid

One of two types of nucleic acid (the other is RNA); a complex organic compound found in all living cells and many viruses. It is the chemical substance of genes.
 inside an icosapentahedral capsid capsid /cap·sid/ (kap´sid) the shell of protein that protects the nucleic acid of a virus; it is composed of structural units, or capsomers.

cap·sid
n.
 surrounded by an amorphous tegument teg·u·ment
n.
A natural outer covering; an integument.
 protein layer and a lipid envelope studded with viral glycoproteins. Glycoproteins on the viral envelope mediate attachment to and entry into the host cell. For HSV, 11 glycoproteins are known (gB-gM), and another is predicted (gN). Of these, nine have been identified in B virus (5).

In general, alphaherpesviruses infect mucosal epithelia ep·i·the·li·a  
n.
A plural of epithelium.
 followed by one or more rounds of replication in epithelial cells. B virus likely replicates with three consecutive rounds of transcription (the [alpha], [beta], and [gamma] genes), as has been established for HSV. The infected cells are lysed, releasing virus to spread to other cells and sensory nerve endings, although direct entry into neurons without replication can occur (3). Virus can also spread from cell to cell without contacting the extracellular environment. Spread of the virus to and from the nerve ganglia ganglia /gan·glia/ (gang´gle-ah) plural of ganglion.  occurs by axonal transport, which has been demonstrated for B virus in experimentally infected mice (7). The virus establishes latency in the nerve ganglia. Latency is characterized by a lack of viral replication and limited viral transcription. Periodic reactivation from latency delivers the virus to mucosal epithelial cells, where it replicates; infectious virus is released from the mucosal epithelium. A heavy viral load in the ganglia may increase the frequency of reactivation and shedding (8). Recent findings from the study of primary and recurrent HSV2 infection indicate that most episodes of recurrent viral shedding are asymptomatic. B-virus shedding in macaques also appears to be primarily asymptomatic (9-11).

B-Virus Infection in Macaques

B-virus infection has been reported most commonly in the rhesus and cynomolgus 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.  (M. facicularis), two species used extensively in biomedical research. B virus has also been isolated from the stumptail (M. artoides), pig-tailed (M. nemestrina), Japanese (M. fuscata), bonnet (M. radiata), and Taiwan (M. cyclopis) macaque (12). Sequence comparisons and restriction fragment length polymorphism restriction fragment length polymorphism
n. Abbr. RFLP
Intraspecies variations in the length of DNA fragments generated by the action of restriction enzymes and caused by mutations that alter the sites at which these enzymes act, changing
 analysis of viral genomes have demonstrated strain differences between B-virus isolates from different macaque species (13). Research suggests that B virus from rhesus macaques may be more pathogenic for humans than B virus from other macaque species (13). Where the species of macaque is noted, cases of human B-virus infection have all been associated with direct or indirect exposure specifically to rhesus macaques (14-19). The ability of nonrhesus strains of B virus to infect humans is not well understood.

Little is known about the biology of B virus in its natural host. Infection is usually acquired at sexual maturity (2-4 years of age for rhesus macaques). As seen in humans with HSV, B-virus seropositivity increases with population age; seropositivity rates of 80% to 100% occur among most adult captive macaque populations (10,20,21). Oral herpetic lesions such as gingivostomatitis, oral and lingual ulcers, and 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  have been described, but are usually associated with immunosuppression immunosuppression

Suppression of immunity with drugs, usually to prevent rejection of an organ transplant. Its aim is to allow the recipient to accept the organ permanently with no unpleasant side effects.
 or stress attributable to recent importation or crowded housing conditions (12,22,23). Genital lesions have not been observed in macaques, although genital infection has been demonstrated by polymerase chain reaction polymerase chain reaction (pŏl`ĭmərās') (PCR), laboratory process in which a particular DNA segment from a mixture of DNA chains is rapidly replicated, producing a large, readily analyzed sample of a piece of DNA; the process is  (PCR PCR polymerase chain reaction.

PCR
abbr.
polymerase chain reaction


Polymerase chain reaction (PCR) 
) (9), virus isolation from the genital mucosa (10,11), and culture of the sacral ganglia (11). In general, macaques remain asymptomatic, and identification of oral herpetic lesions is sufficient grounds for euthanasia of the affected animal. The infrequent cases of disseminated B-virus disease in macaques are most often associated with immunosuppression, caused by either chemotherapy or concurrent infection as with simian type D virus (22). Although severe HSV disease is commonly observed in humans co-infected with HIV HIV (Human Immunodeficiency Virus), either of two closely related retroviruses that invade T-helper lymphocytes and are responsible for AIDS. There are two types of HIV: HIV-1 and HIV-2. HIV-1 is responsible for the vast majority of AIDS in the United States. , no cases of B-virus disease associated with simian immunodeficiency virus Simian immunodeficiency virus (SIV) is a retrovirus that is found, in numerous strains, in primates; the specific strains infecting humans are HIV-1 and HIV-2, the viruses that cause AIDS.

The origin of HIV is now generally attributed to SIV from African primates.
 infection in macaques have been reported (24).

Relatively few studies have surveyed macaques for B-virus shedding, and detection of B virus by culture is rare. Most cases of B-virus detection in asymptomatic macaques by culture or PCR are associated with breeding season stress (9,10), immunosuppression (25), or primary infection (10,11). The true frequency of B-virus shedding in macaque populations is not known but is likely to be low.

Most cases of human B-virus infection have been associated with apparently healthy macaques (i.e., no obvious herpetic lesions), which indicates asymptomatic shedding of the virus. Lack of clinical signs of recurrent infection makes identification of shedding animals difficult. People working with these animals should consider every animal a potential source of B virus and use proper protective equipment and care when handling them (21,26-28).

Human B Virus Infection

Most cases of human B-virus infection have involved direct contact with macaques, such as a bite, scratch, or mucosal contact with body fluid or tissue (12,14-16,19,27,28). Indirect contact, such as injury from a contaminated fomite fomite /fo·mite/ (fo´mit) fomes.

fo·mite
n.
An inanimate object or substance, such as clothing, furniture, or soap, that is capable of transmitting infectious organisms from one individual to
 (e.g., needle puncture or cage scratch), has also resulted in human infection. Human-to-human transmission has been documented in one case (15); however, further investigation has indicated that the risk for secondary transmission is low (18).

Human B-virus disease generally occurs within 1 month of exposure (21), commonly with an incubation period of a few days to a week. The development and progression of disease depend on the site of exposure and the amount of virus inoculated. 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.
 lesions have not been consistently found at the site of exposure (12,14-19). Disease often starts with general influenzalike symptoms of fever, muscle aches, fatigue, and headache (12,14). Other variable symptoms include lymphadenitis Lymphadenitis Definition

Lymphadenitis is the inflammation of a lymph node. It is often a complication of a bacterial infection of a wound, although it can also be caused by viruses or other disease agents.
 and lymphangitis lymphangitis /lym·phan·gi·tis/ (lim?fan-ji´tis) inflammation of a lymphatic vessel or vessels.lymphangi´tic

lym·phan·gi·tis or lym·phan·gi·i·tis
n.
Inflammation of the lymphatic vessels.
, nausea and vomiting Nausea and Vomiting Definition

Nausea is the sensation of being about to vomit. Vomiting, or emesis, is the expelling of undigested food through the mouth.
, abdominal pain, and hiccups (12,14). Neurologic signs develop when the virus spreads to the central nervous system and vary with the part of the brain or spinal cord affected. Hyperesthesias, 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. , diplopia diplopia /di·plo·pia/ (di-plo´pe-ah) the perception of two images of a single object.

binocular diplopia
, agitation, and ascending flaccid paralysis have been described after virus spread to the brain (12,14-19). Virus spread to the central nervous system is an ominous sign; even with antiviral therapy and supportive care, most patients die, and those who survive often have serious neurologic sequelae. Deaths are often attributed to respiratory failure associated with ascending paralysis.

The possibility of asymptomatic or mild B-virus infection in humans has been suggested (2,29). A carefully controlled study of B-virus antibodies in persons with macaque contact and controls without contact showed no evidence of asymptomatic human infection or a carrier state for B virus (29). Although HSV antibodies can neutralize the virus in vitro, antibody titers to HSV are not protective in human cases of B-virus exposure or infection (21,29) and can confound diagnostic testing because of cross-reactivity. Asymptomatic human infection with B virus appears exceedingly rare if it occurs at all.

With the discovery of simian immunodeficiency virus and its identification as a model for HIV infection, the number of macaques used in research has increased, as has the number of human B-virus cases. Guidelines for reducing and controlling exposure were first published in 1987 (26) by a group of veterinarians, physicians, and research scientists called the B Virus working Group. Guidelines were again published in 1995 (21) by a new B Virus Working Group to include new information and provide protocols for handling exposures. Further recommendations were made in 1998 to emphasize the need for limiting mucosal exposure to potential sources of B virus (19,28). New guidelines by another B Virus Working Group have recently been published (30).

Treatment of B-Virus Infection in Humans

The 2002 B Virus Working Group guidelines address issues to be considered in cases of possible exposure to or infection with the virus (30) and reflect consensus of opinion at the time the guidelines were written. In cases of exposure, an established and frequently updated protocol should be used based on these guidelines and on current literature regarding human cases of B-virus infection. Additional information and contacts are available from: URL URL
 in full Uniform Resource Locator

Address of a resource on the Internet. The resource can be any type of file stored on a server, such as a Web page, a text file, a graphics file, or an application program.
: http://www.cdc.gov/niosh/ hid5.html, http://www.haz-map.com/Macaque.htm.

According to the guidelines, the most important action in a case of potential exposure to B virus is to rapidly and thoroughly cleanse the wound or exposure site. HSV can enter sensory nerve endings within 5 minutes of exposure, and B virus is likely to infect just as rapidly. Bite wounds, scratches, or puncture wounds of nonmucosal surfaces should be cleansed with soap or detergent for at least 15 min (30). The time spent mechanically cleansing the area is more important than the type of cleansing solution used. Mucosal surfaces should be rinsed with sterile saline or running water for 15 min. Immediate cleansing or rinsing can inactivate in·ac·ti·vate
v.
1. To render nonfunctional.

2. To make quiescent.



in·acti·va
 and wash away virus present in the exposure site. After immediately cleansing the wound or exposure area, the person should seek medical attention, specifically from a physician identified in the facility's protocol as someone familiar with treating these B-virus exposure cases.

A physician with a patient who has potentially been exposed to B virus faces a conundrum. Before onset of neurologic symptoms, antiviral therapy is successful. However, few cases of potential exposure lead to infection. Prophylactic treatment is unnecessary in most cases of potential exposure because treatment can confound diagnostic testing by interfering with the humoral immune response humoral immune response  

The immune response involving the transformation of B cells into plasma cells that produce and secrete antibodies to a specific antigen. See Note at antibody.

Noun 1.
 (21). However, the 2002 B Virus Working Group viewed prophylactic treatment more favorably in light of the efficacy of postexposure prophylaxis for nosocomial nosocomial /noso·co·mi·al/ (nos?o-ko´me-il) pertaining to or originating in a hospital.

nos·o·co·mi·al
adj.
1. Of or relating to a hospital.

2.
 HIV exposure and the availability of new antiherpes drugs, such as valacyclovir, that achieve higher serum levels with a more reasonable dosing schedule (30). Although severity of injury may prompt use of antiviral therapy, the amount of inoculated virus determines if infection is likely to occur. In some cases, minor scratches or needle-sticks have transmitted B virus, while bites with severe tissue laceration laceration /lac·er·a·tion/ (las?er-a´shun)
1. the act of tearing.

2. a torn, ragged, mangled wound.


lac·er·a·tion
n.
1. A jagged wound or cut.

2.
 have healed without infection. The primary factor to consider is whether cleansing (or rinsing, if it is a mucosal surface) was initiated immediately and performed for the recommended 15 min (21). Inadequate cleansing of the wound or exposed area in a timely manner could warrant prophylactic antiviral therapy. Other indications for immediate initiation of antiviral treatment include the identification of herpetic lesions in the source animal, injuries involving the head or neck, and mucosal exposure to macaque fluid. Because of the prevalence of asymptomatic B-virus shedding in macaques, the clinical appearance of the monkey involved (if the animal is identified) may not be helpful in evaluating the possibility of transmission.

In addition to working closely with a physician trained to handle cases of B-virus exposure and infection, taking samples from the exposed person and the source animal is important for virus culture and serologic testing. A list of recommended swabs for virus culture and serum samples is available from: URL: http://www.gsu.edu/~wwwvir/index.html.

Detection of B Virus

Early suspicion and rapid diagnosis of B-virus infection are critical to the control of human infection. The extreme cross-reactivity of primate alphaherpesviruses has required the development of diagnostic methods that can differentiate between HSV and B-virus infection. Despite the inherent risk for exposure, direct culture of B virus has been the standard for diagnosis of infection. Culture of B virus requires a special containment facility since the virus is a biosafety level 4 pathogen (31). Serologic methods for the detection of B-virus infection have also involved propagation of the virus in tissue culture to produce antigen. However, the substitution of related antigens appears to work well for serologic tests. The most promising of these antigens is herpesvirus papio 2, an alphaherpesvirus of baboons that is as closely related to B virus as HSV-1 and HSV-2 are to each other (32,33). Serologic methods are useful only for retrospective analysis, not for therapeutic decisions, which need to be made rapidly in cases of potential human infection.

More recently, PCR methods have allowed direct demonstration of B-virus infection without the risk of working with virus cultures (9,34,35). PCR methods have been hampered by the close genetic relationship between primate alphaherpesviruses; many require post-PCR techniques to definitively differentiate between HSV and B virus. To specifically detect B virus, we developed a method using quantitative real-time PCR, whose potential application for human clinical samples in cases of exposure warrants further study (9). Samples to be tested by PCR may contain B virus and must be handled accordingly (31).

B Virus Outside the Research Setting

The cases of human B-virus infection that have been described have all occurred in relation to contact with macaques in a biomedical research setting. However, this setting is not the only one in which humans have contact with macaques. The Woburn Safari Park Woburn Safari Park is a safari park located in Woburn, Bedfordshire in the UK. Visitors to the park can drive through the large animal exhibits, which contain species such as White Rhinos, Elephants, Tigers and Black Bears.  in the U.K. recently culled all B-virus-positive macaques from its facility (36). No cases of human infection have been documented despite contact between macaques and humans driving through the park, but the risk perceived by this situation warranted the action. B virus is also prevalent in free-ranging macaques native to Southeast Asia (12,37). A recent survey of workers at a Balinese Hindu temple that is a refuge for free-ranging macaques and a tourist attraction showed that contact between humans and macaques sufficient to transmit B virus commonly occurred. A serosurvey of 38 macaques in the area showed that 31 (81.6%) were B-virus seropositive seropositive /se·ro·pos·i·tive/ (-poz´i-tiv) showing positive results on serological examination; showing a high level of antibody.

se·ro·pos·i·tive
adj.
. No cases consistent with B-virus disease in humans have been described in this area of Bali or in other areas of Southeast Asia where humans are in contact with free-ranging macaques. However, in cases of encephalitis, B virus may not be considered.

In other situations, particularly when potentially seropositive macaques have been domesticated do·mes·ti·cate  
tr.v. do·mes·ti·cat·ed, do·mes·ti·cat·ing, do·mes·ti·cates
1. To cause to feel comfortable at home; make domestic.

2. To adopt or make fit for domestic use or life.

3.
a.
 as pets, opportunities for exposure to B virus are frequent. One report documented many instances of potential exposures from bites, scratches, food sharing, close physical contact, and even shared chewing gum (38). This study also found that children were three times more likely than adults to be bitten by pet macaques. Although the number of macaques kept as pets is probably small, the risk of B-virus infection is increased because of the lack of precautions and the extent of contact between monkey and owner. The risk of B-virus infection is low, but the risk for death is high.

Specific Pathogen-Free Colony Development

In 1989, the National Institutes of Health's 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.  started funding specific pathogen-free macaque colony development. The timing and local nature of B-virus reactivation and shedding make detecting infection in an animal difficult. Therefore, serologic methods are used to screen and monitor animals for consideration as pathogen-free. Numerous negative serologic results are necessary to determine a macaque's B-virus status. Although specific pathogen-free status reduces the likelihood of infection, this status does not eliminate the risk for infection entirely. Full protective equipment should be used for working with all macaques regardless of their pathogen status. While population numbers in these specific pathogen-free colonies are increasing, the demand for pathogen-free animals will continue to exceed the supply for some time (24).

B-Virus Vaccine Development

While antiviral therapy has substantially improved the survival rate for human B-virus infection, fatal cases still occur (19,28). The ability of the virus to modulate and evade the immune response has stymied vaccine development for most herpesvirus infections. A vaccine for use in rhesus macaques could reduce transmission of the virus and, over time, reduce the prevalence of infection in captive macaque populations. Given the lack of an effective vaccine for HSV after years of research effort and clinical trials, development of a B-virus vaccine presents a challenge.

A formalin-inactivated B-virus vaccine was developed and tested in the 1960s (39). Although this vaccine did induce an antibody response, antibody titers were low, and frequent boosters (every 3 months) were required (39). Recently, successful use of a vaccinia vac·cin·i·a
n.
1. See cowpox.

2. An infection induced in humans by inoculation with the vaccinia virus in order to confer resistance to smallpox; it is usually limited to the site of inoculation.
 vector to deliver the gD gene of B virus was demonstrated in rabbits with protection of 10 (91%) of 11 animals from B-virus challenge (40). A DNA vaccine against B virus has also recently been described (41). Glycoprotein B of B virus delivered in a plasmid vector induced a humoral hu·mor·al
adj.
1. Relating to body fluids, especially serum.

2. Relating to or arising from any of the bodily humors.


Humoral
Pertaining to or derived from a body fluid.
 response in both mice and rhesus macaques. Although no challenge experiments were performed in monkeys, an anamnestic-like response upon boosting was noted. While the ability of a B-virus antibody response to protect from infection is not known, studies of HSV suggest that an antibody response alone is not protective. Both the vaccinia and DNA vaccine approaches described above are likely to induce cellular immunity to B virus, although the cellular response was not studied by either group (40,41). As clinical trials of candidate HSV vaccines progress, the development of a B-virus vaccine for use in macaques or humans at risk for exposure should be considered.

Conclusion

The potential for fatal human infection with B virus is a constant concern because frequent exposures occur to humans in the course of caring for and using macaques in a research setting. Personal protective equipment and safe handling procedures have limited the incidence of human disease. However, little is known about the biology of B virus in the natural macaque host. A clear understanding of the real risk for B-virus shedding in its natural host will help identify opportunities to prevent or limit zoonotic B-virus disease.

References

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1. inflammation of the spinal cord; often expanded to include noninflammatory spinal cord lesions.

2. inflammation of the bone marrow (osteomyelitis).
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mu·co·cu·ta·ne·ous
adj.
Of or relating to the skin and a mucous membrane.
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Study of bacteria. Modern understanding of bacterial forms dates from Ferdinand Cohn's classifications. Other researchers, such as Louis Pasteur, established the connection between bacteria and fermentation and disease.
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(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.
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Health and Human Services, HHS
, PHS (Personal Handyphone System) A TDMA-based cellular phone system introduced in Japan in mid-1995. Operating in the 1880-1930 MHz band, PHS uses microcells that cover an area only 100 to 500 meters in diameter, resulting in lower equipment costs but requiring more base , Centers for Disease Control and Prevention, National Institutes of Health. Biosafety in microbiological and biomedical laboratories. 4th ed. Washington: U.S. Government Printing Office; 1999.

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(36.) Monkeys with herpes B virus culled at a safari park. Commun Dis Rep CDR (1) See CD-R and extension.

(2) (Call Detail Reporting) See call accounting.

(3) (Common Data Rate) A standard sampling rate for digital video for 480i and 576i systems. The rate is 13.5 MHz. See ITU-R BT.
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(41.) Loomis-Huff JE, Eberle R, Lockridge KM, Rhodes G, Barry PA. Immunogenicity immunogenicity /im·mu·no·ge·nic·i·ty/ (-je-nis´it-e) the property enabling a substance to provoke an immune response, or the degree to which a substance possesses this property.  of a DNA vaccine against herpes B virus in mice and rhesus macaques. Vaccine 2001;19:4865-73.

Address for correspondence: Jennifer L. Huff, Department of Medical Microbiology and Immunology, University of California, Davis The University of California, Davis, commonly known as UC Davis, is one of the ten campuses of the University of California, and was established as the University Farm in 1905. , CA 95616, USA; fax: (530) 752-8692; e-mail: jlmshuff@ucdavis.edu

Jennifer L. Huff * and Peter A. Barry *

* University of California The University of California has a combined student body of more than 191,000 students, over 1,340,000 living alumni, and a combined systemwide and campus endowment of just over $7.3 billion (8th largest in the United States). , California, USA

Dr. Huff's dissertation research was supported by a Comparative Medicine Training Grant from the NIH "Not invented here." See digispeak.

NIH - The United States National Institutes of Health.
 (RR07038) and a grant from the American College of Laboratory Animal Medicine.

Dr. Huff is a postdoctoral fellow at the University of California, Davis. This review stems from her dissertation work performed with Peter A. Barry at the Center for Comparative Medicine. Dr. Huff studies infectious diseases in the rhesus macaque model system.

Dr. Barry is an associate professor in the Center for Comparative Medicine and Department of Medical Pathology at the University of California, Davis, and a staff scientist at the California National Primate Research Center The California National Primate Research Center (CNPRC) is a United States federal government funded biomedical research facility, dedicated to improving human and animal health, and located on the University of California, Davis campus in Davis, California.  (CNPRC CNPRC California National Primate Research Center ). Dr. Barry's primary research addresses the mechanisms of rhesus cytomegalovims persistence and pathogenesis. He is also working to improve B-virus diagnostics and understand B-virus pathogenesis in the CNPRC macaque colony.
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Date:Feb 1, 2003
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