Novel spotted fever group rickettsiae infecting Amblyomma dubitatum in northeastern Argentina.

MONJE LD, NAVA S, EBERHARDT A, CORREA A, GUGLIELMONE AA, BELDOMÉNICO PM.

Congreso; III Congreso Panamericano de Zoonosis.; 2014

Cases of rickettsioses produced by the genus Rickettsia have been described in several countries of South America in the last 20 years. In Argentina, sevenRickettsia have been described in several countries of South America in the last 20 years. In Argentina, seven Rickettsia species have been reported: Rickettsia rickettsii, Rickettsia parkeri, Rickettsia massiliae, Rickettsia bellii, ?Candidatus Rickettsia amblyommii?, and ?Candidatus Rickettsia andeanae´, all associated with ticks, and Rickettsia felis associated with fleas. Of these, R. rickettsii and R. parkeri are the etiological agents of Rocky Mountain spotted fever and eschar-associated spotted fever, respectively; which are transmitted in Argentina by the ticks Amblyoma cajennense sensu lato and Amblyomma triste. In the past few years, new strains of Rickettsia, some of them closely related to R. parkeri, were described in Brazil infecting Amblyomma nodosum (strain NOD), Amblyomma ovale (strain Atlantic rainforest) and Amblyomma dubitatum (strains COOPERI and Pampulha) ticks. Of these new strains, only Rickettsia sp. strain Atlantic rainforest has been reported as a human pathogen.species have been reported: Rickettsia rickettsii, Rickettsia parkeri, Rickettsia massiliae, Rickettsia bellii, ?Candidatus Rickettsia amblyommii?, and ?Candidatus Rickettsia andeanae´, all associated with ticks, and Rickettsia felis associated with fleas. Of these, R. rickettsii and R. parkeri are the etiological agents of Rocky Mountain spotted fever and eschar-associated spotted fever, respectively; which are transmitted in Argentina by the ticks Amblyoma cajennense sensu lato and Amblyomma triste. In the past few years, new strains of Rickettsia, some of them closely related to R. parkeri, were described in Brazil infecting Amblyomma nodosum (strain NOD), Amblyomma ovale (strain Atlantic rainforest) and Amblyomma dubitatum (strains COOPERI and Pampulha) ticks. Of these new strains, only Rickettsia sp. strain Atlantic rainforest has been reported as a human pathogen., Rickettsia bellii, ?Candidatus Rickettsia amblyommii?, and ?Candidatus Rickettsia andeanae´, all associated with ticks, and Rickettsia felis associated with fleas. Of these, R. rickettsii and R. parkeri are the etiological agents of Rocky Mountain spotted fever and eschar-associated spotted fever, respectively; which are transmitted in Argentina by the ticks Amblyoma cajennense sensu lato and Amblyomma triste. In the past few years, new strains of Rickettsia, some of them closely related to R. parkeri, were described in Brazil infecting Amblyomma nodosum (strain NOD), Amblyomma ovale (strain Atlantic rainforest) and Amblyomma dubitatum (strains COOPERI and Pampulha) ticks. Of these new strains, only Rickettsia sp. strain Atlantic rainforest has been reported as a human pathogen.´, all associated with ticks, and Rickettsia felis associated with fleas. Of these, R. rickettsii and R. parkeri are the etiological agents of Rocky Mountain spotted fever and eschar-associated spotted fever, respectively; which are transmitted in Argentina by the ticks Amblyoma cajennense sensu lato and Amblyomma triste. In the past few years, new strains of Rickettsia, some of them closely related to R. parkeri, were described in Brazil infecting Amblyomma nodosum (strain NOD), Amblyomma ovale (strain Atlantic rainforest) and Amblyomma dubitatum (strains COOPERI and Pampulha) ticks. Of these new strains, only Rickettsia sp. strain Atlantic rainforest has been reported as a human pathogen.and R. parkeri are the etiological agents of Rocky Mountain spotted fever and eschar-associated spotted fever, respectively; which are transmitted in Argentina by the ticks Amblyoma cajennense sensu lato and Amblyomma triste. In the past few years, new strains of Rickettsia, some of them closely related to R. parkeri, were described in Brazil infecting Amblyomma nodosum (strain NOD), Amblyomma ovale (strain Atlantic rainforest) and Amblyomma dubitatum (strains COOPERI and Pampulha) ticks. Of these new strains, only Rickettsia sp. strain Atlantic rainforest has been reported as a human pathogen.Amblyoma cajennense sensu lato and Amblyomma triste. In the past few years, new strains of Rickettsia, some of them closely related to R. parkeri, were described in Brazil infecting Amblyomma nodosum (strain NOD), Amblyomma ovale (strain Atlantic rainforest) and Amblyomma dubitatum (strains COOPERI and Pampulha) ticks. Of these new strains, only Rickettsia sp. strain Atlantic rainforest has been reported as a human pathogen.Rickettsia, some of them closely related to R. parkeri, were described in Brazil infecting Amblyomma nodosum (strain NOD), Amblyomma ovale (strain Atlantic rainforest) and Amblyomma dubitatum (strains COOPERI and Pampulha) ticks. Of these new strains, only Rickettsia sp. strain Atlantic rainforest has been reported as a human pathogen.Amblyomma nodosum (strain NOD), Amblyomma ovale (strain Atlantic rainforest) and Amblyomma dubitatum (strains COOPERI and Pampulha) ticks. Of these new strains, only Rickettsia sp. strain Atlantic rainforest has been reported as a human pathogen.Amblyomma dubitatum (strains COOPERI and Pampulha) ticks. Of these new strains, only Rickettsia sp. strain Atlantic rainforest has been reported as a human pathogen.Rickettsia sp. strain Atlantic rainforest has been reported as a human pathogen. Amblyomma dubitatum feeds typically on capybaras (Hydrochoerus hydrochaeris), which are present at high densities in northeastern Argentina. In this region A. cajennense does not occur, and capybaras are found infested mainly by A. dubitatum. Herein we report for the first time in Argentina the presence of Rickettsia sp. strain Atlantic rainforest and describefeeds typically on capybaras (Hydrochoerus hydrochaeris), which are present at high densities in northeastern Argentina. In this region A. cajennense does not occur, and capybaras are found infested mainly by A. dubitatum. Herein we report for the first time in Argentina the presence of Rickettsia sp. strain Atlantic rainforest and describeA. cajennense does not occur, and capybaras are found infested mainly by A. dubitatum. Herein we report for the first time in Argentina the presence of Rickettsia sp. strain Atlantic rainforest and describeA. dubitatum. Herein we report for the first time in Argentina the presence of Rickettsia sp. strain Atlantic rainforest and describeRickettsia sp. strain Atlantic rainforest and describe A. dubitatum as a new vector of this pathogen. In addition, we report the presence ofas a new vector of this pathogen. In addition, we report the presence of Rickettsia sp. strain COOPERI in northeastern Argentinasp. strain COOPERI in northeastern Argentina