hello sir ,there is taken one test serology test.what does it mean? and it s result is .salomonella typhi o 1:20 =+ ,1:40=+ ,1:80=+ ,1:160=+,1:320= - salomonella typhi H 1:20=+ ,1:40=+, 1:80= -, 1:160= - ,1:320= - paratyphi AH 1:20=+ , 1:40=+ , , , BH , , , , . please doctor tell me what does it mean ? it s my nephew report he is 18 years old.