Summary—During 2008, 49 states and Puerto Rico reported 6,841 cases of rabies in animals and 2 cases in humans to the CDC, representing a 3.1% decrease from the 7,060 cases in animals and 1 case in a human reported in 2007. Approximately 93% of the cases were in wildlife, and 7% were in domestic animals. Relative contributions by the major animal groups were as follows: 2,389 (34.9%) raccoons, 1,806 (26.4%) bats, 1,589 (23.2%) skunks, 454 (6.6%) foxes, 294 (4.3%) cats, 75 (1.1%) dogs, and 59 (0.9%) cattle. Compared with numbers of cases reported in 2007, numbers of cases reported in 2008 increased among cats, cattle, and skunks and decreased among dogs, raccoons, bats, and foxes. Numbers of rabid raccoons reported during 2008 decreased in 11 of the 20 eastern states where raccoon rabies was enzootic; overall number of rabid raccoons reported decreased by 8.6% during 2008, compared with 2007.
On a national level, the number of rabies cases involving skunks increased by 7.7% during 2008, compared with the number reported in 2007; this was the first increase in the number of reported rabid skunks since 2006. The total number of cases of rabies reported nationally in foxes decreased 1.7% in 2008, compared with 2007. The 1,806 cases of rabies reported in bats represented a 6.7% decrease, compared with the number reported in 2007. One case of rabies in a dog imported from Iraq was reported at a quarantine station in New Jersey during 2008. Follow-up of potentially exposed animals in the same shipment did not reveal any secondary transmission. The United States remained free from dog-to-dog transmission of canine rabies virus variants. Total number of rabid dogs reported decreased 19.4% in 2008, compared with 2007.
Two human rabies cases were reported from California and Missouri during 2008. The California case involved a recent immigrant from Mexico and was attributed to a newly identified rabies virus variant most likely associated with Mexican free-tailed bats. The case in Missouri was attributed to a rabies virus variant associated with eastern pipistrelle and silver-haired bats.
Summary—During 2009, 49 states and Puerto Rico reported 6,690 rabid animals and 4 human rabies cases to the CDC, representing a 2.2% decrease from the 6,841 rabid animals and 2 human cases reported in 2008. Approximately 92% of reported rabid animals were wildlife. Relative contributions by the major animal groups were as follows: 2,327 (34.8%) raccoons, 1,625 (24.3%) bats, 1,603 (24.0%) skunks, 504 (75%) foxes, 300 (4.5%) cats, 81 (1.2%) dogs, and 74 (1.1%) cattle. Compared with 2008, numbers of rabid raccoons and bats that were reported decreased, whereas numbers of rabid skunks, foxes, cats, cattle, dogs, and horses that were reported increased.
Fewer rabid raccoons, compared with 2008, were reported by 12 of the 20 eastern states where raccoon rabies is enzootic, and number of rabid raccoons decreased by 2.6% overall nationally. Despite a 10% decrease in the number of rabid bats that were reported and a decrease in the total number of bats submitted for testing, bats were the second most commonly submitted animal, behind cats, during 2009. The number of rabid skunks that were reported increased by 0.9% overall. The proportion of rabid skunks in which infection was attributed to the raccoon rabies virus variant decreased from 473% in 2008 to 40.9% in 2009, resulting in a 12.7% increase in the number of rabid skunks infected with a skunk rabies virus variant. The number of rabid foxes increased 11.0% overall from the previous year.
Four cases of rabies involving humans were reported from Texas, Indiana, Virginia, and Michigan. The Texas case represented the first presumptive abortive human rabies case, with the patient recovering after the onset of symptoms without intensive care. The Indiana and Michigan cases were associated with bat rabies virus variants. The human rabies case in Virginia was associated with a canine rabies virus variant acquired during the patient's travel to India.
Summary—During 2006, 49 states and Puerto Rico reported 6,940 cases of rabies in animals and 3 cases in humans to the CDC, representing an 8.2% increase from the 6,417 cases in animals and 1 case in a human reported in 2005. Approximately 92% of the cases were in wildlife, and 8% were in domestic animals. Relative contributions by the major animal groups were as follows: 2,615 raccoons (37.7%), 1,692 bats (24.4%), 1,494 skunks (21.5%), 427 foxes (6.2%), 318 cats (4.6%), 82 cattle (1.2%), and 79 dogs (1.1%). Compared with numbers of reported cases in 2005, cases in 2006 increased among all groups except cattle. Increases in numbers of rabid raccoons during 2006 were reported by 11 of the 20 eastern states where raccoon rabies was enzootic, and reported cases increased by 3.2% overall, compared with 2005.
On a national level, the number of rabies cases in skunks during 2006 increased by 6.1% from the number reported in 2005. Once again, Texas reported the greatest number (n = 351) of rabid skunks and the greatest overall state total of animal rabies cases (889). No cases of rabies associated with the dog/coyote rabies virus variant were reported. The last identified case of this canine rabies virus variant was identified in March 2004, along the US/Mexi-co border. With 2006 marking the second year of no apparent transmission of the dog/coyote variant, these findings from surveillance data support the contention that the canine rabies virus variant is no longer in circulation in the United States. Total number of cases of rabies reported nationally in foxes increased 13.6%, compared with 2005. Increases in the number of reported rabid foxes were attributable to greater numbers of foxes reported with the Arctic fox rabies virus variant in Alaska, the Texas gray fox rabies virus variant in Texas, and the raccoon rabies virus variant in Virginia. The 1,692 cases of rabies reported in bats represented a 14.5% increase, compared with numbers reported in 2005, making bats the second most reported rabid animal behind raccoons. Cases of rabies in cats, dogs, horses and mules, and sheep and goats increased 18.2%, 3.9%, 12.8%, and 22.2%, respectively, whereas cases reported in cattle decreased 11.8%. In Puerto Rico, reported cases of rabies in mongooses increased 9.2%, and rabies in domestic animals, presumably attributable to spillover infection from mongooses, increased 20%.
Three cases of human rabies were reported from Texas, Indiana, and California during 2006. The cases in Indiana and Texas were attributed to bat rabies virus variants, whereas the case in California was attributed to an exposure to a dog in the Philippines.
Summary—During 2011, 49 states and Puerto Rico reported 6,031 rabid animals and 6 human rabies cases to the CDC, representing a 1.9% decrease from the 6,153 rabid animals and 2 human cases reported in 2010. Approximately 92% of reported rabid animals were wildlife. Relative contributions by the major animal groups were as follows: 1,981 raccoons (32.8%), 1,627 skunks (27.0%), 1,380 bats (22.9%), 427 foxes (7.1%), 303 cats (5.0%), 65 cattle (1.1%), and 70 dogs (1.2%). Compared with 2010, there was a substantial increase in the number of rabid skunks reported. Six cases of rabies involving humans were reported from California, Massachusetts, New Jersey, New York, and South Carolina. Three cases reported from Massachusetts, New Jersey, and New York were determined to be a result of canine rabies virus variants acquired outside the United States.
Summary—During 2010, 48 states and Puerto Rico reported 6,154 rabid animals and 2 human rabies cases to the CDC, representing an 8% decrease from the 6,690 rabid animals and 4 human cases reported in 2009. Hawaii and Mississippi did not report any laboratory-confirmed rabid animals during 2010. Approximately 92% of reported rabid animals were wildlife. Relative contributions by the major animal groups were as follows: 2,246 raccoons (36.5%), 1,448 skunks (23.5%), 1,430 bats (23.2%), 429 foxes (6.9%), 303 cats (4.9%), 71 cattle (1.1 %), and 69 dogs (1.1 %). Compared with 2009, number of reported rabid animals decreased across all animal types with the exception of a 1 % increase in the number of reported rabid cats.
Two cases of rabies involving humans were reported from Louisiana and Wisconsin in 2010. Louisiana reported an imported human rabies case involving a 19-year-old male migrant farm worker who had a history of a vampire bat (Desmodus rotundus) bite received while in Mexico. This represents the first human rabies case reported in the United States confirmed to have been caused by a vampire bat rabies virus variant. Wisconsin reported a human rabies case involving a 70-year-old male that was confirmed to have been caused by a rabies virus variant associated with tri-colored bats (Perimyotis subflavus).
Objective—To evaluate postexposure prophylaxis
(PEP) in dogs experimentally infected with rabies.
Procedure—Dogs were sedated and inoculated in
the right masseter muscle with a salivary gland
homogenate from a naturally infected rabid dog (day
0). Six hours later, 5 dogs were treated by administration
of 2 murine anti-rabies glycoprotein monoclonal
antibodies (mAb) and commercial vaccine; 5 received
mAb alone; 5 received purified, heat-treated, equine
rabies immune globulin (PHT-ERIG) and vaccine; 5
received PHT-ERIG alone; 4 received vaccine alone;
and 5 control dogs were not treated. The mAb or PHTERIG
was administered at the site of rabies virus inoculation.
Additional vaccine doses for groups mAb plus
vaccine, PHT-ERIG plus vaccine, and vaccine alone
were administered IM in the right hind limb on days
3, 7, 14, and 35.
Results—All control dogs and dogs that received only
vaccine developed rabies. In the PHT-ERIG and vaccine
group, 2 of 5 dogs were protected, whereas
none were protected with PHT-ERIG alone. Use of
mAb alone resulted in protection in 4 of 5 dogs.
Administration of mAb in combination with vaccine
provided protection in all 5 dogs.
Conclusions and Clinical Relevance—Current
national guidelines recommend euthanasia or a 6-
month quarantine for unvaccinated animals exposed
to rabies. Findings from this study document that vaccine
alone following severe exposure was unable to
provide protection from rabies. However, vaccine
combined with mAb resulted in protection in all treated
dogs, revealing the potential use of mAb in PEP
against rabies in naïve dogs. (Am J Vet Res
Summary—During 2003, 49 states and Puerto Rico reported 7,170 cases of rabies in nonhuman animals and 3
cases in human beings to the CDC. This represents a 10% decrease from the 7,967 cases in nonhuman animals and
3 cases in human beings reported in 2002. More than 91% (n = 6,556) were in wild animals, and 8.6% (614) were
in domestic species (compared with 92.5% in wild animals and 7.4% in domestic species in 2002). The relative contributions
of the major groups of animals were as follows: 2,635 raccoons (36.7%), 2,112 skunks (29.4%), 1,212 bats
(16.9%), 456 foxes (6.4%), 321 cats (4.5%), 117 dogs (1.6%), and 98 cattle (1.4%). Compared with cases reported
in 2002, the number of cases reported in 2003 decreased among all reporting groups with the exception of cats,
dogs, equids, and swine. Ten of the 19 states with enzootic rabies in raccoons, the District of Columbia, and New
York City reported decreases in the numbers of rabid raccoons during 2003. Tennessee reported 4 cases of indigenous
rabies in raccoons during 2003, becoming the 20th state where rabies in raccoons is known to be enzootic.
On a national level, the number of rabies cases in skunks during 2003 decreased by 13.2% from those reported
in 2002. Texas again reported the greatest number (n = 620) of rabid skunks during 2003, as well as the greatest
overall state total of rabies cases (909). As in 2002, Texas did not report any cases of rabies associated with the
dog/coyote variant of the rabies virus, but did report 61 cases associated with the gray fox variant of the virus (compared
with 65 cases in 2002). The 1,212 cases of rabies reported in bats during 2003 represented a decline of nearly
12% from the previous year's record high of 1,373 cases for this group of mammals. Cases of rabies reported in
foxes and raccoons declined 10.2% and 8.9%, respectively, during 2003. Rabies among sheep and goats decreased
from 15 cases in 2002 to 12 cases in 2003, whereas cases reported in cats, dogs, and equids increased 7.4%,
18.2%, and 8.6%, respectively. In Puerto Rico, reported cases of rabies in mongooses and dogs decreased 26.9%
and 35.7%, respectively, from those reported in 2002.
Three cases of rabies in human beings were reported in California, Virginia, and Puerto Rico during 2003. The
Virginia case was the first reported occurrence of rabies in a human being infected with the raccoon rabies virus
variant; however, the exposure history was unknown. The California and Puerto Rico cases were the result of infections
with bat and dog/mongoose rabies virus variants, respectively, and each patient had a history of a bite.