Well not too sure I would take Yahoo Health all that seriously when it comes to life and death illnesses....
I believe having lived through Rocky Mountain Spotted Fever personally and consulting with multiple health care professionals including a Rocky Mountain specialist for infectious diseases, that there is alot of conflicting info on the internet and trying to manage your health care on your own using info found on the net can be very dangerous.
As I was told by more than one specialist, there are some ticks that at times to a "Bite & Drop" this means they bite you, feed and then drop off on their own for whatever reason. Now since tick bites are painless as they possess a type of natural anesthetic in their saliva, you will never feel the bite and thus never even know you were bitten if a "Bite & Drop" happens to you. This is exactly what happened to me. The tick could not have been on me very long because I was only outside in the yard for about an hour max and when I came in there was no ticks on me at all. As the Dr's told me, the bacteria for RMSF within the tick, only has to be present in the ticks saliva to infect you. Other things like Lyme disease, generally takes longer for it to travel from the ticks stomach to its saliva, but there are alot of variables as to when the tick bit last and such before biting you.
I think it is imperative that anyone who thinks they may have been bitten by a tick, consult with their Dr. if they show any symptoms. DO NOT use internet medical advice as a means to rule anything out when it comes to this disease, it could cost you your life.
Read about it and absorb what you can, but don't rely on the info as fact because alot of the info out there is both old and not accurate for every scenario or disease. For example below are a couple of links, one of which is the CDC (Little more reliable than Yahoo medical) and it clearly states that some people never remember being bitten like me. Yet they still get infected. Anyway the real myths to debunk IMO are its safe to rely on internet medical info... Please consult your Dr if you feel bad after a tick bite or it may cost you alot more than you think.
Diseases: Rocky Mountain Spotted Fever | CDC Healthy Pets Healthy People
This site below says the tick must be attached only several hours, while other say 24 and yet other sites say 6 hours and yet some infectious disease specialists who routinely treat Rocky mount fever say immediate infection is not only possible but has been studied recently.... You decide what your willing to bet your life on....
http://www.afpmb.org/sites/default/files/pubs/techguides/TG26/files/RMSJusttheFactsApril2006.pdf