ABSTRACT
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ABSTRACT
Zika virus (ZIKV) is a mosquito-borne pathogen, and Aedes aegypti has been identified as the main vector of the disease. Other mosquito species in the Aedes and Culex genera have been suggested to have the potential for being competent vectors based on experimental exposition of mosquitoes to an infectious blood meal containing ZIKV. Here, we report the isolation in cell culture of ZIKV obtained from different body parts of wild-caught female mosquitoes (Ae. aegypti, Ae. vexans, Cx. quinquefasciatus, Cx. coronator, and Cx. tarsalis) and whole male mosquitoes (Ae. aegypti and Cx. quinquefasciatus) in Mexico. Importantly, this is the first report that shows the presence of the virus in the salivary glands of the wild-caught female mosquitoes species, Cx. coronator, Cx. tarsalis, and Ae. vexans. Our findings strongly suggest that all the species reported herein are potential vectors for ZIKV.
Subject(s)
Aedes/virology , Culex/virology , Mosquito Vectors/virology , Zika Virus/isolation & purification , Animals , Female , Male , Mexico , Salivary Glands/virology , Virus CultivationABSTRACT
Real-time PCR of Amblyomma imitator tick egg masses obtained in Nuevo Leon State, Mexico, identified a Rickettsia species. Sequence analyses of 17-kD common antigen and outer membrane protein A and B gene fragments showed to it to be R. rickettsii, which suggested a potential new vector for this bacterium.
Subject(s)
Insect Vectors/microbiology , Rickettsia rickettsii/isolation & purification , Rocky Mountain Spotted Fever/transmission , Ticks/microbiology , Animals , Bacterial Outer Membrane Proteins/chemistry , Bacterial Outer Membrane Proteins/genetics , Base Sequence , DNA, Bacterial/chemistry , DNA, Bacterial/genetics , Female , Humans , Insect Vectors/ultrastructure , Male , Mexico , Microscopy, Electron , Molecular Sequence Data , Polymerase Chain Reaction , Rickettsia rickettsii/genetics , Sequence Analysis, DNA , Ticks/ultrastructureABSTRACT
We developed a typing method that can differentiate 8 strains of Rickettsia prowazekii into 7 genotypes. This method can be used to type and trace the origin of R. prowazekii isolated from samples collected during epidemics after a bioterrorism attack.
Subject(s)
Genotype , Rickettsia prowazekii/genetics , Base Sequence , DNA, Bacterial/genetics , PhylogenyABSTRACT
The state of Nuevo Leon, Mexico has had outbreaks of typhus group rickettsiosis, most recently recognized in 1997. Evaluation of the sera of 345 patients with a dengue-like illness revealed that 25.5% had antibodies reactive with typhus group rickettsiae and 16% had antibodies to Rickettsia parkeri. Rickettsiae were detected by PCR and shell-vial isolations in the field-collected Amblyomma ticks. Molecular characterization by DNA sequence analysis of the gltA, ompB, and 17-kDa gene identified the organisms to be R. prowazekii.
