The taxonomy of the typhus biogroup ( and []) of the genus and has been studied on the basis of the guanine plus cytosine content of the respective deoxyribonucleic acids (DNAs), the genome size, and the degree of DNA-DNA hybridization. The previously published guanine plus cytosine values for certain strains are confirmed, and the guanine plus cytosine values are described for some additional strains in each species. The genome sizes of four strains of , three strains of , and two strains of were very similar and averaged approximately 10 daltons. The various strains within the species boundaries hybridized at nearly the 100% level. The DNAs of various strains of hybridized with the DNAs of various strains of rather consistently at the level of 70 to 77%. The DNAs of two strains of hybridized with those of Breinl and Wilmington in the range of 25 to 33%.


Article metrics loading...

Loading full text...

Full text loading...


Most cited this month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error