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==Diagnosis==
==Diagnosis==
The [[Gold standard (test)|reference method]] for diagnosing rabies is by performing [[polymerase chain reaction|PCR]] or [[cell culture#Viral culture methods|viral culture]] on brain samples taken after death. The diagnosis can also be reliably made from skin samples taken before death.<ref name="Dacheux2008">{{cite journal|author=Dacheux L, Reynes J-M, Buchy P, ''et al.''|year=2008 |journal=Clin Infect Dis|title=A reliable diagnosis of human rabies based on analysis of skin biopsy specimens |volume=47 |issue=11 |pages=1410–17 |doi=10.1086/592969| pmid=18937576}}</ref> It is also possible to make the diagnosis from saliva, urine and cerebrospinal fluid samples, but this is not as [[sensitive]]. Inclusion bodies called [[Negri bodies]] are 100% diagnostic for rabies infection, but are found in only about 80% of cases.<ref name=Sherris/> If possible, the animal from which the bite was received should also be examined for rabies.<ref name="Ly2009">{{cite journal |author=Ly S, Buchy P, Heng NY, ''et al.'' |title=Rabies situation in Cambodia |journal=PLoS Negl Trop Dis |volume=3 |issue=9 |pages=e511 |year=2009 |pmid=19907631 |pmc=2731168 |doi=10.1371/journal.pntd.0000511 |url=http://dx.plos.org/10.1371/journal.pntd.0000511}}</ref>
The [[Gold standard (test)|reference method]] for diagnosing rabies is by performing [[polymerase chain reaction|PCR]] or [[cell culture#Viral culture methods|viral culture]] on brain samples taken after death they also grab your dick and check if its inflamed. The diagnosis can also be reliably made from skin samples taken before death.<ref name="Dacheux2008">{{cite journal|author=Dacheux L, Reynes J-M, Buchy P, ''et al.''|year=2008 |journal=Clin Infect Dis|title=A reliable diagnosis of human rabies based on analysis of skin biopsy specimens |volume=47 |issue=11 |pages=1410–17 |doi=10.1086/592969| pmid=18937576}}</ref> It is also possible to make the diagnosis from saliva, urine and cerebrospinal fluid samples, but this is not as [[sensitive]]. Inclusion bodies called [[Negri bodies]] are 100% diagnostic for rabies infection, but are found in only about 80% of cases.<ref name=Sherris/> If possible, the animal from which the bite was received should also be examined for rabies.<ref name="Ly2009">{{cite journal |author=Ly S, Buchy P, Heng NY, ''et al.'' |title=Rabies situation in Cambodia |journal=PLoS Negl Trop Dis |volume=3 |issue=9 |pages=e511 |year=2009 |pmid=19907631 |pmc=2731168 |doi=10.1371/journal.pntd.0000511 |url=http://dx.plos.org/10.1371/journal.pntd.0000511}}</ref>


The [[differential diagnosis]] in a case of suspected human rabies may initially include any cause of [[encephalitis]], particularly infection with viruses such as [[herpesviridae|herpesviruses]], [[enteroviruses]], and [[arboviruses]] (e.g., [[West Nile virus]]). The most important viruses to rule out are [[herpes simplex virus]] type 1, [[varicella-zoster virus]], and (less commonly) enteroviruses, including [[coxsackie virus|coxsackievirus]]es, [[echovirus]]es, [[poliovirus]]es, and human [[enterovirus]]es 68 to 71.<ref>{{cite web |url=http://emedicine.medscape.com/article/220967-diagnosis |title=Rabies: Differential Diagnoses & Workup |format= |work= eMedicine Infectious Diseases | date=2008-10-03 |accessdate=2010-01-30}}</ref> In addition, consideration should be given to the local [[epidemiology]] of encephalitis caused by arboviruses belonging to several [[taxonomy|taxonomic]] groups, including eastern and western [[equine encephalitis|equine encephalitis virus]]es, [[St. Louis encephalitis]] virus, [[Powassan virus]], the [[California encephalitis virus]] serogroup, and [[La Crosse virus]].{{Citation needed|date=January 2010}}
The [[differential diagnosis]] in a case of suspected human rabies may initially include any cause of [[encephalitis]], particularly infection with viruses such as [[herpesviridae|herpesviruses]], [[enteroviruses]], and [[arboviruses]] (e.g., [[West Nile virus]]). The most important viruses to rule out are [[herpes simplex virus]] type 1, [[varicella-zoster virus]], and (less commonly) enteroviruses, including [[coxsackie virus|coxsackievirus]]es, [[echovirus]]es, [[poliovirus]]es, and human [[enterovirus]]es 68 to 71.<ref>{{cite web |url=http://emedicine.medscape.com/article/220967-diagnosis |title=Rabies: Differential Diagnoses & Workup |format= |work= eMedicine Infectious Diseases | date=2008-10-03 |accessdate=2010-01-30}}</ref> In addition, consideration should be given to the local [[epidemiology]] of encephalitis caused by arboviruses belonging to several [[taxonomy|taxonomic]] groups, including eastern and western [[equine encephalitis|equine encephalitis virus]]es, [[St. Louis encephalitis]] virus, [[Powassan virus]], the [[California encephalitis virus]] serogroup, and [[La Crosse virus]].{{Citation needed|date=January 2010}}

Revision as of 12:08, 12 May 2010

This article is about the disease. For the virus, see Rabies virus. For other uses, see Rabies (disambiguation).
Rabies
SpecialtyInfectious diseases, veterinary medicine Edit this on Wikidata

Rabies (pronounced /ˈreɪbiːz/. From Latin: rabies) is a viral disease that causes acute encephalitis (inflammation of the brain) in warm-blooded animals.[1] It is zoonotic (i.e., transmitted by animals), most commonly by a bite from an infected animal but occasionally by other forms of contact. Rabies is almost invariably fatal if post-exposure prophylaxis is not administered prior to the onset of severe symptoms.

The rabies virus travels to the brain by following the peripheral nerves. The incubation period of the disease is usually a few months in humans, depending on the distance the virus must travel to reach the central nervous system.[2] Once the rabies virus reaches the central nervous system and symptoms begin to show, the infection is effectively untreatable and usually fatal within days.

Early-stage symptoms of rabies are malaise, headache and fever, progressing to acute pain, violent movements, uncontrolled excitement, depression, and hydrophobia.[1] Finally, the patient may experience periods of mania and lethargy, eventually leading to coma. The primary cause of death is usually respiratory insufficiency.[2] Worldwide, the vast majority of human rabies cases (approximately 97%) come from dog bites.[3] In the United States, however, animal control and vaccination programs have effectively eliminated domestic dogs as reservoirs of rabies.[4] In several countries, including the United Kingdom, Australia and Japan, rabies carried by animals that live on the ground has been eradicated entirely. Concerns exist about airborne and mixed-habitat animals including bats. Bats in the U.K. and in some other countries carry European Bat Lyssavirus 1 and European Bat Lyssavirus 2. The symptoms of these viruses are similar to those of rabies and so the viruses are both known as bat rabies. An unvaccinated Scottish bat handler died from an EBLV in 2002[2].

The economic impact is also substantial, as rabies is a significant cause of death of livestock in some countries.

Signs and symptoms

Patient with rabies, 1959

The period between infection and the first flu-like symptoms is normally two to twelve weeks, but can be as long as two years. Soon after, the symptoms expand to slight or partial paralysis, cerebral dysfunction, anxiety, insomnia, confusion, agitation, abnormal behavior, paranoia, terror, hallucinations, progressing to delirium.[2][5] The production of large quantities of saliva and tears coupled with an inability to speak or swallow are typical during the later stages of the disease; this can result in hydrophobia, in which the patient has difficulty swallowing because the throat and jaw become slowly paralyzed, shows panic when presented with liquids to drink, and cannot quench his or her thirst.

Death almost invariably results two to ten days after the first symptoms; the few humans who are known to have survived the disease were all left with severe brain damage, with one recorded exception resulting from implementation of the Milwaukee protocol.[6]

Virology

Main article: Rabies virus
TEM micrograph with numerous rabies virions (small, dark grey, rodlike particles) and Negri bodies (the larger pathognomonic cellular inclusions of rabies infection).

The rabies virus is the type species of the Lyssavirus genus, which encompasses other similar viruses. Lyssaviruses have helical symmetry, with a length of about 180 nm and a cross-sectional diameter of about 75 nm.[1] These viruses are enveloped and have a single stranded RNA genome with negative-sense. The genetic information is packaged as a ribonucleoprotein complex in which RNA is tightly bound by the viral nucleoprotein. The RNA genome of the virus encodes five genes whose order is highly conserved: nucleoprotein (N), phospholipid (P), matrix protein (M), glycoprotein (G) and the viral RNA polymerase (L).[7]

From the point of entry, the virus is neurotropic, traveling quickly along the neural pathways into the central nervous system (CNS), and then further into other organs.[2] The salivary glands receive high concentrations of the virus thus allowing further transmission.

Diagnosis

The reference method for diagnosing rabies is by performing PCR or viral culture on brain samples taken after death they also grab your dick and check if its inflamed. The diagnosis can also be reliably made from skin samples taken before death.[8] It is also possible to make the diagnosis from saliva, urine and cerebrospinal fluid samples, but this is not as sensitive. Inclusion bodies called Negri bodies are 100% diagnostic for rabies infection, but are found in only about 80% of cases.[1] If possible, the animal from which the bite was received should also be examined for rabies.[9]

The differential diagnosis in a case of suspected human rabies may initially include any cause of encephalitis, particularly infection with viruses such as herpesviruses, enteroviruses, and arboviruses (e.g., West Nile virus). The most important viruses to rule out are herpes simplex virus type 1, varicella-zoster virus, and (less commonly) enteroviruses, including coxsackieviruses, echoviruses, polioviruses, and human enteroviruses 68 to 71.[10] In addition, consideration should be given to the local epidemiology of encephalitis caused by arboviruses belonging to several taxonomic groups, including eastern and western equine encephalitis viruses, St. Louis encephalitis virus, Powassan virus, the California encephalitis virus serogroup, and La Crosse virus.[citation needed]

New causes of viral encephalitis are also possible, as was evidenced by the recent outbreak in Malaysia of some 300 cases of encephalitis (mortality rate, 40%) caused by Nipah virus, a newly recognized paramyxovirus.[11] Similarly, well-known viruses may be introduced into new locations, as is illustrated by the recent outbreak of encephalitis due to West Nile virus in the eastern United States.[12] Epidemiologic factors (e.g., season, geographic location, and the patient’s age, travel history, and possible exposure to animal bites, rodents, and ticks) may help direct the diagnostic workup.

Cheaper rabies diagnosis will be possible for low-income settings: accurate rabies diagnosis can be done at a tenth of the cost of traditional testing using basic light microscopy techniques.[13]

Prevention

Main article: Rabies vaccine

All human cases of rabies were fatal until a vaccine was developed in 1885 by Louis Pasteur and Émile Roux. Their original vaccine was harvested from infected rabbits, from which the nerve tissue was weakened by allowing it to dry for five to ten days.[14] Similar nerve tissue-derived vaccines are still used in some countries, as they are much cheaper than modern cell culture vaccines.[15] The human diploid cell rabies vaccine was started in 1967; however, a new and less expensive purified chicken embryo cell vaccine and purified vero cell rabies vaccine are now available.[9] A recombinant vaccine called V-RG has been successfully used in Belgium, France, Germany and the United States to prevent outbreaks of rabies in wildlife.[16] Currently pre-exposure immunization has been used in both human and non-human populations, whereas in many jurisdictions domesticated animals are required to be vaccinated.[17]

In the U.S., since the widespread vaccination of domestic dogs and cats and the development of effective human vaccines and immunoglobulin treatments, the number of recorded deaths from rabies has dropped from one hundred or more annually in the early twentieth century, to 1–2 per year, mostly caused by bat bites, which may go unnoticed by the victim and hence untreated.[4]

September 28 is World Rabies Day, which promotes information on, and prevention and elimination of the disease.[18]

Management

Post-exposure prophylaxis

Treatment after exposure, known as post-exposure prophylaxis (PEP), is highly successful in preventing the disease if administered promptly, generally within ten days of infection.[1] Thoroughly washing the wound as soon as possible with soap and water for approximately five minutes is very effective at reducing the number of viral particles. “If available, a virucidal antiseptic such as povidone-iodine, iodine tincture, aqueous iodine solution or alcohol (ethanol) should be applied after washing...Exposed mucous membranes such as eyes, nose or mouth should be flushed well with water.”[19]

In the United States, the Centers for Disease Control and Prevention (CDC) recommend patients receive one dose of human rabies immunoglobulin (HRIG) and four doses of rabies vaccine over a fourteen day period. The immunoglobulin dose should not exceed 20 units per kilogram body weight. HRIG is very expensive and constitutes the vast majority of the cost of post-exposure treatment, ranging as high as several thousand dollars. As much as possible of this dose should be infiltrated around the bites, with the remainder being given by deep intramuscular injection at a site distant from the vaccination site.[20] The first dose of rabies vaccine is given as soon as possible after exposure, with additional doses on days three, seven and fourteen after the first. Patients who have previously received pre-exposure vaccination do not receive the immunoglobulin, only the post-exposure vaccinations on day 0 and 2.

Modern cell-based vaccines are similar to flu shots in terms of pain and side effects. The old nerve-tissue-based vaccinations that require multiple painful injections into the abdomen with a large needle are cheap, but are being phased out and replaced by affordable WHO ID (intradermal) vaccination regimens.[9]

Intramuscular vaccination should be given into the deltoid, not gluteal area which has been associated with vaccination failure due to injection into fat rather than muscle. In infants the lateral thigh is used as for routine childhood vaccinations.

Finding a bat in the room of a sleeping infant is regarded as an indication for post-exposure prophylaxis. The recommendation for the precautionary use of post-exposure prophylaxis in occult bat encounters where there is no recognized contact has been questioned in the medical literature based on a cost-benefit analysis.[21] However, recent studies have further confirmed the wisdom of maintaining the current protocol of precautionary administering of PEP. In cases where a child or mentally compromised individual has been left alone with a bat, especially in sleep areas (where a bite/or exposure may occur while the victim is asleep and unaware or awake and unaware that a bite occurred). This is illustrated by the September 2000 case of a nine-year old boy from Quebec who died an agonizing death (over a 14 day period) from rabies 4 weeks after being in the presence of a sick bat, even though there was no apparent report of a bite; as shown in the following conclusion made by the doctors involved in the case:

Despite recent criticism (45), the dramatic circumstances surrounding our patient's history, as well as increasingly frequent reports of human rabies contracted in North America, support the current Canadian guidelines which state that RPEP [PEP] is appropriate in cases where a significant contact with a bat cannot be excluded (45). The notion that a bite or an overt break in the skin needs to be seen or felt for rabies to be transmitted by a bat is a myth in many cases.[22]

It is highly recommended that PEP be administered as soon as possible. Begun with little or no delay, PEP is 100% effective against rabies.[6] In the case in which there has been a significant delay in administering PEP, the treatment should be administered regardless of that delay, as it may still be effective.[20] If there has been a delay between exposure and attempts at treatment, such that the possibility exists that the virus has already penetrated the nervous system, the possibility exists that amputation of the affected limb might thwart rabies, if the bite or exposure was on an arm or leg. This treatment should be combined with an intensive PEP regimen.[citation needed]

Blood-brain barrier

Some recent works have shown that during lethal rabies infection, the blood-brain barrier (BBB) does not allow anti-viral immune cells to enter the brain, the primary site of rabies virus replication.[23] This aspect contributes to the pathogenicity of the virus and artificially increasing BBB permeability promotes viral clearance.[24] Opening the BBB during rabies infection has been suggested as a possible novel approach to treat the disease, even though no attempts have yet been made to determine whether or not this treatment could be successful.[citation needed]

Induced coma

See also: Milwaukee protocol

In 2005, American teenager Jeanna Giese survived an infection of rabies unvaccinated. She was placed into an induced coma upon onset of symptoms and given ketamine, midazolam, ribavirin, and amantadine. Her doctors administered treatment based on the hypothesis that detrimental effects of rabies were caused by temporary dysfunctions in the brain and could be avoided by inducing a temporary partial halt in brain function that would protect the brain from damage while giving the immune system time to defeat the virus. After thirty-one days of isolation and seventy-six days of hospitalization, Giese was released from the hospital.[25] She survived with almost no permanent sequelae and as of 2009 was starting her third year of university studies.[26]

Giese's treatment regimen became known as the "Milwaukee protocol", which has since undergone revision (the second version omits the use of ribavirin). There were 2 survivors out of 25 patients treated under the first protocol. A further 10 patients have been treated under the revised protocol and there have been a further 2 survivors.[27] The anesthetic drug ketamine has shown the potential for rabies virus inhibition in rats,[28] and is used as part of the Milwaukee protocol.

On April 10, 2008 in Cali, Colombia, an eleven year-old boy was reported to survive rabies and the induced coma without noticeable brain damage.[29]

Prognosis

In unvaccinated humans, rabies is almost always fatal after neurological symptoms have developed, but prompt post-exposure vaccination may prevent the virus from progressing. Rabies kills around 55,000 people a year, mostly in Asia and Africa.[30] There are only six known cases of a person surviving symptomatic rabies, and only one known case of survival in which the patient received no rabies-specific treatment either before or after illness onset.[31][32][33]

The most current survival data using the Milwaukee protocol is available from the rabies registry.[34]

Epidemiology

Rabies-free countries as of 2010

Transmission

Main article: Rabies transmission

Any warm-blooded animal (including humans) may become infected with the rabies virus and develop symptoms (though birds have only been known to be experimentally infected[35]). Indeed the virus has even been adapted to grow in cells of poikilothermic vertebrates[36][37] though natural transmission has only been documented among mammals.[citation needed] Most animals can be infected by the virus and can transmit the disease to humans. Infected bats, monkeys, raccoons, foxes, skunks, cattle, wolves, coyotes, dogs, mongoose (normally yellow mongoose)[38] or cats present the greatest risk to humans. Rabies may also spread through exposure to infected domestic farm animals, groundhogs, weasels, bears and other wild carnivores. Rodents (mice, squirrels etc) are seldom infected.[39]

The virus is usually present in the nerves and saliva of a symptomatic rabid animal.[40][41] The route of infection is usually, but not always, by a bite. In many cases the infected animal is exceptionally aggressive, may attack without provocation, and exhibits otherwise uncharacteristic behavior.[42]

Transmission between humans is extremely rare. A few cases have been recorded through transplant surgery.[43]

After a typical human infection by bite, the virus enters the peripheral nervous system. It then travels along the nerves towards the central nervous system.[44] During this phase, the virus cannot be easily detected within the host, and vaccination may still confer cell-mediated immunity to prevent symptomatic rabies. When the virus reaches the brain, it rapidly causes encephalitis. This is called the prodromal phase, and is the beginning of the symptoms. Once the patient becomes symptomatic, treatment is almost never effective and mortality is over 99%. Rabies may also inflame the spinal cord producing transverse myelitis.[45][46]

Prevalence

Main article: Prevalence of rabies

The rabies virus survives in widespread, varied, rural fauna reservoirs. It is present in the animal populations of almost every country in the world, except in New Zealand.[47] In some countries like those in western Europe and Oceania, rabies is considered to be prevalent among bat populations only.

In Asia, parts of the Americas and large parts of Africa, dogs remain the principal host. Mandatory vaccination of animals is less effective in rural areas. Especially in developing countries, pets may not be privately kept and their destruction may be unacceptable. Oral vaccines can be safely distributed in baits, and this has successfully reduced rabies in rural areas of France, Ontario, Texas, Florida and elsewhere, like the City of Montréal, Québec, where baits are successfully used on raccoons in the Mont-Royal park area. Vaccination campaigns may be expensive, and a cost-benefit analysis can lead those responsible to opt for policies of containment rather than elimination of the disease.

There are an estimated 55,000 human deaths annually from rabies worldwide, with about 31,000 in Asia, and 24,000 in Africa.[30] One of the sources of recent flourishing of rabies in East Asia is the pet boom. China introduced in the city of Beijing the “one-dog policy” in November 2006 to control the problem.[48] India has been reported as having the highest rate of human rabies in the world, primarily because of stray dogs.[49] As of 2007, Vietnam had the second-highest rate, followed by Thailand; in these countries too the virus is primarily transmitted through canines (feral dogs and other wild canine species). Recent reports suggest that wild rabid dogs are roaming the streets. Because much cheaper pre-vaccination is not commonly administered in places like Thailand, the expense for lack of preparation with far more costly post-exposure prophylaxis can hit families hard.[50]

Rabies was once rare in the United States outside the Southern states [citation needed], but as of 2006, raccoons in the mid-Atlantic and northeast United States had been suffering from a rabies epidemic since the 1970s, which was moving westwards into Ohio.[51] In the midwestern United States, skunks are the primary carriers of rabies, comprising 134 of the 237 documented non-human cases in 1996.

History

Etymology

The term is derived from the Latin rabies, "madness".[52] This, in turn, may be related to the Sanskrit rabhas, "to do violence". The Greeks derived the word "lyssa", from "lud" or "violent"; this root is used in the name of the genus of rabies lyssavirus.[53]

Impact

Because of its potentially violent nature, rabies has been known since c.2000 B.C.[54] The first written record of rabies is in the Codex of Eshnunna (ca. 1930 BC), which dictates that the owner of a dog showing symptoms of rabies should take preventive measure against bites. If another person was bitten by a rabid dog and later died, the owner was fined heavily.[55]

Rabies was considered a scourge for its prevalence in the 19th century. Fear of rabies related to methods of transmissions was almost irrational;[53] however, this gave Louis Pasteur ample opportunity to test post-exposure treatments from 1885.[56]

In other animals

Main article: Rabies in animals

Rabies is infectious to mammals. Three stages of rabies are recognized in dogs and other animals. The first stage is a one- to three-day period characterized by behavioral changes and is known as the prodromal stage. The second stage is the excitative stage, which lasts three to four days. It is this stage that is often known as furious rabies for the tendency of the affected dog to be hyperreactive to external stimuli and bite at anything near. The third stage is the paralytic stage and is caused by damage to motor neurons. Incoordination is seen owing to rear limb paralysis and drooling and difficulty swallowing is caused by paralysis of facial and throat muscles. Death is usually caused by respiratory arrest.[57]

As recently as 2004, a new symptom of rabies has been observed in foxes. Probably at the beginning of the prodromal stage, foxes, which are extremely cautious by nature, seem to lose this instinct. Foxes will come into settlements, approach people, and generally behave as if tame. How long such "euphoria" lasts is not known. But even in this state such animals are extremely dangerous, as their saliva and excretions still contain the virus and they remain very unpredictable.[58]

See also

References

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  2. ^ a b c d Cotran RS, Kumar V, Fausto N; et al. (2005). Robbins and Cotran Pathologic Basis of Disease (7th ed.). St. Louis: Elsevier/Saunders. p. 1375. ISBN 0-7216-0187-1. {{cite book}}: Explicit use of et al. in: |author= (help)CS1 maint: multiple names: authors list (link)
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  32. ^ Jordan Lite (2008-10-08). "Medical Mystery: Only One Person Has Survived Rabies without Vaccine—But How?". Scientific American. p. 4. Retrieved 2008-10-16.
  33. ^ "Teenager survives case of Rabies in Recife, Brasil(Portuguese)". 2009-09-18. p. 1.
  34. ^ "Rabies Registry". Medical College of Wisconsin. Retrieved 29 December 2009.
  35. ^ Gough,Patricia M.;Jorgenson,Richard D. (July 1976). "Rabies Antibodies in Sera of Wild Birds" (PDF). Journal of Wildlife Diseases Vol. 12. Retrieved 19 mar 2009. {{cite web}}: Check date values in: |accessdate= (help)CS1 maint: multiple names: authors list (link)
  36. ^ Wong, Derek. "Rabies". Wong's Virology. Retrieved 19 mar 2009. {{cite web}}: Check date values in: |accessdate= (help)
  37. ^ Campbell,James B.;Charlton,K.M. (1988). Developments in Veterinary Virology: Rabies. Kluwer Academic Publishers: Springer. p. 48. ISBN 0898383900, 9780898383904. {{cite book}}: Check |isbn= value: invalid character (help)CS1 maint: multiple names: authors list (link)
  38. ^ Taylor PJ (1993). "A systematic and population genetic approach to the rabies problem in the yellow mongoose (Cynictis penicillata)". The Onderstepoort Journal of Veterinary Research. 60 (4): 379–87. PMID 7777324. {{cite journal}}: Unknown parameter |month= ignored (help)
  39. ^ "Types of Exposure - CDC Rabies". 1600 Clifton Rd, Atlanta, GA 30333, USA: Centers for Disease Control and Prevention. 2007-09-03. Retrieved 2008-02-12. {{cite web}}: Cite has empty unknown parameters: |month=, |dateformat=, and |coauthors= (help)CS1 maint: location (link)
  40. ^ The Merck Manual, Eleventh Edition (1983), p. 183
  41. ^ The Merck manual of Medical Information. Second Home Edition, (2003), p. 484.
  42. ^ Turton, Jenny (2000). "Rabies: a killer disease". National Department of Agriculture.
  43. ^ Srinivasan A, Burton EC, Kuehnert MJ, et al.. Transmission of rabies virus from an organ donor to four transplant recipients. N Engl J Med (abstract) (pdf) (accessed 12 January 2009)
  44. ^ Alan C. Jackson, William H. Wunner (2002) Rabies Academic Press, p. 290, ISBN 0123790778
  45. ^ Joanne Lynn, M.D. (October 1997) Transverse Myelitis: Symptoms, Causes and Diagnosis The Transverse Myelitis Association
  46. ^ Larry Ernest Davis, Molly K. King, Jessica L. Schultz (2005) Fundamentals of neurologic disease Demos Medical Publishing, LLC, p.73 ISBN 1888799846
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  50. ^ Biomed.com: Transmission dynamics of rabies virus in Thailand: Implications for disease control
  51. ^ National Association of State Public Health Veterinarians, Inc. (NASPHV) (2006). "Compendium of animal rabies prevention and control, 2006". MMWR Recomm Rep. 55 (RR-5): 1–8. PMID 16636647.
  52. ^ Simpson DP (1979). Cassell's Latin Dictionary (5 ed.). London: Cassell Ltd. p. 883. ISBN 0-304-52257-0.
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  54. ^ Adamson PB (1977). "The spread of rabies into Europe and the probable origin of this disease in antiquity". Journal of the Royal Asiatic Society of Great Britain & Ireland. Royal Asiatic Society of Great Britain and Ireland. 2: 140–4. PMID 11632333.
  55. ^ Dunlop, Robert H. (1996). Veterinary Medicine: An Illustrated History. Mosby. ISBN 0-8016-3209-9. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)
  56. ^ "The Life and Times of Louis Pasteur"
  57. ^ Ettinger, Stephen J.; Feldman, Edward C. (1995). Textbook of Veterinary Internal Medicine (4th ed.). W.B. Saunders Company. ISBN 0-7216-6795-3.{{cite book}}: CS1 maint: multiple names: authors list (link)
  58. ^ Dmitry Iljin "Cautiously foxes. About epidemic of rabies among foxes on the average of river Volga." http://dimas.sk6.ru/blog/our-pages/
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