Also, it is suggested that cholesterol is acquired from the host and incorporated into the outer cell membrane to compensate for the lack of stability due to absence of peptidoglycans. Structural stability of its outer membranes are probably based on covalent and noncovalent associations between outer membrane proteins. 
The enzymes required for the tricarboxylic acid pathway, along with the enzymes needed for transfer of amino acids to the pathway, are all present in the metabolism of E. canis. Both a gluconeogenesis pathway and a nonoxidative pentose-phosphate pathway exist as well. Biosynthetic pathways for aspartate, lysine, arginine, proline, glutamate, and glutamine are also found in E. canis.>>>>
Meaning what exactly?
One place said:
>>>Certain other laboratory tests can suggest a diagnosis of ehrlichiosis. These include a low white blood cell count, low blood sodium level and certain elevated liver function tests.
>>>Other laboratory findings indicative of ehrlichiosis include low white blood cell count, low platelet count, and elevated liver enzymes.
And, everything my grandma and mom did wrong in removing it (plus drowned it with aqua velva after shave- and left the head in after it died and they pulled it off)
Note: Folklore remedies such as petroleum jelly or hot matches do little to encourage a tick to detach from skin. In fact, they may make matters worse by irritating the tick and stimulating it to release additional saliva, increasing the chances of transmitting the pathogen.