Microorganisms in the ticks Amblyomma dissimile Koch 1844 and Amblyomma rotundatum Koch 1844 collected from snakes in Brazil.

Ogrzewalska M, et al. Med Vet Entomol. 2018.


Knowledge about ticks (Acari) and screening of ticks parasitizing various hosts are necessary to understand the epidemiology of tick-borne pathogens. The objective of this study was to investigate tick infestations on snakes (Reptilia: Squamata: Serpentes) arriving at the serpentarium at the Institute Vital Brazil, Rio de Janeiro. Some of the identified ticks were individually tested for the presence of bacteria of the genera Rickettsia (Rickettsiales: Rickettsiaceae), Borrelia (Spirochaetales: Spirochaetaceae), Coxiella (Legionellales: Coxiellaceae), Bartonella (Rhizobiales: Bartonellaceae), Ehrlichia (Rickettsiales: Anaplasmataceae), Anaplasma (Rickettsiales: Anaplasmataceae), and Apicomplexa protozoa of the genera Babesia (Piroplasmida: Babesiidae) and Hepatozoon (Eucoccidiorida: Hepatozoidae).

A total of 115 hard ticks (Ixodida: Ixodidae) were collected from 17 host individuals obtained from four Brazilian states. Two species of tick were identified: Amblyomma dissimile Koch 1844 (four larvae, 16 nymphs, 40 adults), and Amblyomma rotundatum Koch 1844 (12 nymphs, 43 adults).

Rickettsia bellii was found in A. rotundatum and A. dissimile ticks and Rickettsia sp. strain Colombianensi, Anaplasma-like and Hepatozoon sp. in A. dissimile ticks. Among the tested ticks, no DNA of Borrelia, Bartonella, Coxiella or Babesia was found. The present findings extend the geographic range of Rickettsia sp. strain Colombianensi in Brazil and provide novel tick-host associations.



Great example of how we need to expand our minds regarding ticks and the hosts they feed on.  For far too long the white footed mouse has been the sole perp blamed along with the black-legged tick.  There are many other ticks transmitting disease and many other hosts.

Please understand that researchers in their vying for dollars want to simplify and whittle things down into a narrow, confined project.  Unfortunately, nothing about Lyme/MSIDS is simple or narrow and this type of thinking has hurt patients for over 40 years.

More is coming out on the importance of birds transiting ticks everywhere:

Key quote:

“We see that infectious diseases can spread to new geographical areas and that is why it is necessary to understand the role of different animal species in the dynamics of these diseases,” says Tove Hoffman.

Lizards must be factored in as well:

And for Wisconsinites, lizards are a problem here too:

Researchers working at Fort McCoy near Sparta, as part of a multi-university project Michigan State ecologist Jean Tsao leads, have collected deer ticks from five-lined skinks and snakes.

For pictures and the geographical range of WI skinks, see (yes, they are in Dane County):