Thanks for the query to H.C.M. Forum.
Causative organisms of nasal pneumonia
present or not present only blood culture
But for joints pain you have to take treatment and causes of joints may be,
1 Rheumatoid arthritis
, ( as many joints involved ), write down if pain of joints are migratory or localizes to 2-3 joints.
3 Infective gout
Consult an Orthopaedician / one more physician ( for 2nd opinion for nasal infection
Get in blood for C B C, E S R, R A factor.
Hope I have answered your question.
If further any question I will help.