Changes

*Group A is transmitted between cats and is monotypic: one vaccine covers all isolates. Infection with this viral subgroup leads to '''[[Lymphoma|lymphosarcoma]]'''.

*Group A is transmitted between cats and is monotypic: one vaccine covers all isolates. Infection with this viral subgroup leads to '''[[Lymphoma|lymphosarcoma]]'''.

*Group B is recombinant with transmissible FeLV-A; infection with viruses of this subgroup increases the chance of developing '''thymic tumors'''.

*Group B is recombinant with transmissible FeLV-A; infection with viruses of this subgroup increases the chance of developing '''thymic tumors'''.

*Group C is a mutant of subgroup A. Isolates are rare, and occur as A+C mixtures, leading to  an increased chance of developing '''anemia'''.

*Group C is a mutant of subgroup A. Isolates are rare, and occur as A+C mixtures, leading to  an increased chance of developing '''[[Regenerative and Non-Regenerative Anaemias|anemia]]'''.

==Diagnosis==

==Diagnosis==