How to [constantly] read the last line of a file?

I have client filtering out data from an live MQTT stream which writes the data into a myfile.csv file, here are the last four lines:

1426134425,m,NWRL,MSV,001,d,SVlts,139,1840343,26089,28529,15987
1426134444,m,NWRL,MSV,001,d,status,139,1859000,23911,-33.836465,151.051189
1426134834,m,gf,TMX6BP,075,d,SVlts,216,1243746,27209,27409,17106
1426134845,m,gf,TMX6BP,075,d,status,216,1254000,179583,-33.836465,151.051189

This file constantly gets updated. So the last line of the csv file would constantly be changing however it would still be in the same format. __Q:__ How can I read the last line where the 7th value is 'status' not 'SVlts' of the myfile.csv file with bash? Once read how can I assign the 4th, 5th and 10th value to a 3 different variables? I will be pushing these values out to update a MySQL table. So the output can be something as follows:

variable_1=TMX6BP
variable_2=075
variable_3=179583

As mentioned these three variables will be pushed/sent out to update a MySQL table (which needs these three variables in order to update itself) until the next line is printed in to the myfile.csv. And this will happen over and over again.