Index: DGDefs.h
===================================================================
diff -u -r7478e582478c060395a0ae48da55f454c9cc9752 -r5e5378064b7d047c4257c003ca4ba681f560ccac
--- DGDefs.h	(.../DGDefs.h)	(revision 7478e582478c060395a0ae48da55f454c9cc9752)
+++ DGDefs.h	(.../DGDefs.h)	(revision 5e5378064b7d047c4257c003ca4ba681f560ccac)
@@ -305,6 +305,9 @@
     DG_HEAT_DISINFECT_STATE_CANCEL_BASIC_PATH,                  ///< Heat disinfect, cancel mode basic path state
     DG_HEAT_DISINFECT_STATE_CANCEL_WATER_PATH,                  ///< Heat disinfect, cancel mode water path state
     DG_HEAT_DISINFECT_STATE_COMPLETE,                           ///< Heat disinfect, complete state
+#ifndef _RELEASE_
+    DG_NELSON_HEAT_DISINFECT_STATE_FILL_R1_WITH_WATER,
+#endif
     NUM_OF_DG_HEAT_DISINFECT_STATES                             ///< Number of heat disinfect mode states
 };
 typedef enum DG_Heat_States DG_HEAT_DISINFECT_STATE_T;          ///< Type for DG heat disinfect states enumeration
@@ -337,6 +340,7 @@
     F32 R1FillLevel;                                            ///< Reservoir 1 level upon starting the heat disinfect.
     F32 R2FillLevel;                                            ///< Reservoir 2 level upon starting the heat disinfect.
     U32 heatDisinfectUIState;                                   ///< Heat disinfect UI state.
+    U32 nelsonSupportMode;                                      ///< Nelson support mode.
 } MODE_HEAT_DISINFECT_DATA_T;
 #endif
 
@@ -413,6 +417,7 @@
     F32 R1FillLevel;                                            ///< Reservoir 1 level upon starting the chemical disinfect.
     F32 R2FillLevel;                                            ///< Reservoir 2 level upon starting the chemical disinfect.
     U32 chemDisinfectUIState;                                   ///< Chemical disinfect UI state.
+    U32 nelsonSupportMode;                                      ///< Nelson support mode.
 } MODE_CHEMICAL_DISINFECT_DATA_T;
 #endif
 
@@ -631,6 +636,21 @@
     NUM_OF_HEATERS_STATE,                                               ///< Number of heaters state.
 } HEATERS_STATE_T;
 
+#ifndef _RELEASE_
+/// Nelson lab disinfect efficacy support
+typedef enum Nelson_States
+{
+    NELSON_NONE = 0,                                                    ///< Nelson none.
+    NELSON_INOCULATE,                                                   ///< Nelson inoculate.
+    NELSON_HEAT_DISINFECT,                                              ///< Nelson heat disinfect.
+    NELSON_POS_CONTROL_CHEM_DISINFECT,                                  ///< Nelson positive control chemical disinfect.
+    NELSON_POS_CONTROL_HEAT_DISINFECT,                                  ///< Nelson positive control heat disinfect.
+    NELSON_CHEM_DISINFECT,                                              ///< Nelson chemical disinfect.
+    NELSON_DRAIN_SAMPLES,                                               ///< Nelson drain sample.
+    NUM_OF_NELSON_SUPPORT                                               ///< Number of Nelson supports.
+} NELSON_SUPPORT_T;
+#endif
+
 /**@}*/
 
 #endif