Ehrlichia[ edit ] Ehrlichia is a rickettsial bacteria belonging to the family Ehrlichiaceae. There are several species of Ehrlichia, but the one that most commonly affects dogs and causes the most severe clinical signs is Ehrlichia canis. This species infects monocytes in the peripheral blood. The brown dog tick, or Rhipicephalus sanguineous , that passes the organism to the dog is prevalent throughout most of the United States , but most cases tend to occur in the Southwest and Gulf Coast regions where there is a high concentration of the tick. Ehrlichia is found in many parts of the world and was first recognized in Algeria in During the Vietnam War ehrlichiosis became well known as a dog disease due to the infection and death of many military working dogs.
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Types[ edit ] Five see note below species have been shown to cause human infection:  Anaplasma phagocytophilum causes human granulocytic anaplasmosis. Ehrlichia ewingii causes human ewingii ehrlichiosis. Ehrlichia chaffeensis causes human monocytic ehrlichiosis. Neorickettsia sennetsu The latter two infections are not well studied. Until then, human ehrlichiosis was thought to be very rare or absent in both states. A rash may occur, but is uncommon.
Ehrlichiosis can also blunt the immune system by suppressing production of TNF-alpha , which may lead to opportunistic infections such as candidiasis. Some cases can present with purpura and in one such case, the organisms were present in such overwhelming numbers that in , Dr.
Aileen Marty of the AFIP was able to demonstrate the bacteria in human tissues using standard stains, and later proved that the organisms were indeed Ehrlichia using immunoperoxidase stains. Tick control is the main preventive measure against the disease.
However, in late , a breakthrough in the prevention of canine monocytic ehrlichiosis was announced when a vaccine was accidentally discovered by Prof.
For people allergic to antibiotics of the tetracycline class, rifampin is an alternative. Cases have been reported in every month of the year, but most cases are reported during April—September. From , the average yearly incidence of ehrlichiosis was 3. This is more than twice the estimated incidence for Children less than 10 years and adults aged 70 years and older have the highest case-fatality rates.
Ehrlichiosis and Related Infections
Cuando las garrapatas extrae la sangre de un perro infectado adquiere la Ehrlichia Canis en estado de larva o de ninfa y la transmite a otro perro, en forma de ninfa o en estado ya adulto, por medio de la saliva de dicha garrapata. Es decir, la garrapata chupa la sangre de un perro lobo, zorro o coyote infestado, adquiere la E. Las garrapatas pueden inocular al mismo tiempo distintas enfermedades como Babesiosis, Borreliosis, Leishmaniasis o hepatozoonosis. Del mismo modo puede suceder en perros ancianos o enfermos. Se producen porque la E.
Puedes encontrar una garrapata en la parte trasera de tus rodillas, en la ingle, las axilas, las orejas, la parte trasera del cuello y en cualquier otro lugar del cuerpo. Si bien es posible que no puedas evitar recorrer zonas donde hay garrapatas, estas sugerencias pueden ayudarte a encontrar y a quitar las garrapatas antes de que se prendan a tu piel: Usa ropa de colores claros. Las garrapatas son de color oscuro. La ropa clara ayuda a detectar las garrapatas antes de que puedan prenderse a la piel.