Here's a rough bass tab of Superbug from Infest the Rats' Nest, I'm aware it's not 100% accurate
[Intro]
[Guitar Intro] 0:00 - 0:16
  
0:16
[Intro]
G|--------------------------------------------|
D|--------------------------------------------|
A|-9------------9-------------9-----9----9----|    Repeat x3
E|---11--9--11-----11--9--11----11---11---11--|
On third time:
G|---------------------------------------------------|
D|---------------------------------------11----------|
A|-9------------9-------------9--11--13------13--11--|    
E|---11--9--11-----11--9--11-------------------------|
    
[Verse 1]                                                      
  
G|-----------|                G|------------|                    
D|-----------|                D|------------|
A|-----------| x14   and then A|-(11)-(13)--|                      
E|--11-11-11-|                E|--9----11---|                       
                                                                     
Superbug coming up...
G|-----------|                G|------------|   
D|-----------|                D|------------|
A|-----------| x8    and then A|-(11)-(13)--|
E|--11-11-11-|                E|--9----11---|
Should'a used phages...
G|-----------|                G|------------|   
D|-----------|                D|------------|
A|-----------| x8    and then A|-(11)-(13)--|
E|--11-11-11-|                E|--9----11---|
Superbug gave a shrug... 
G|-----------|                G|------------|   
D|-----------|                D|------------|
A|-----------| x12   and then A|-(11)-(13)--|
E|--11-11-11-|                E|--9----11---|
Deadly contagious
G|-----------|                G|------------|   
D|-----------|                D|------------|
A|-----------| x16   and then A|-(11)-(13)--|
E|--11-11-11-|                E|--9----11---|

             
[Pre-Chorus 1]
(These are just root notes, Joey plays with some scales)
Pony up...
G|--------------------------|
D|--------------------------|
A|-----------------11~------|
E|--11~--13~--14~------10~--|    
G|-----------------------|
D|-----------------------|
A|-----------------------| 
E|--12h11--11--11--11----|                                  
(repeat a few times, only play 2 Eb notes after a bar or two)
        
[Chorus]
                    
Superbug in my blood
G|-----------------------|
D|-----------------------|
A|-----------------------| see above
E|--12h11--11--11--11----|                      
                                     
...disturbing stuff
G|-----|
D|-----|
A|-----| 
E|--9~-|             
Repeat that x2

  [Intro]
  [Verse 1]
  [Pre-Chorus 1]
  [Chorus]
                  
Later on the band comes in with a more driving section, repeat this riff throughout it,
Also repeat through the guitar solo       
G|---------------------------------------------------|
D|---------------------------------------11----------|
A|-9------------9-------------9--11--13------13--11--|    
E|---11--9--11-----11--9--11-------------------------|
  
 
[Chorus]