A biovar is a variant prokaryotic strain that differs physiologically or biochemically from other strains in a particular species. Morphovars (or morphotypes) are those strains that differ morphologically. Serovars (or serotypes) are those strains that have antigenic properties that differ from other strains. List of biovars This is a list of biovars and strains of biovars listed at the NCBI Taxonomy database: Acinetobacter calcoaceticus biovar anitratus, a homotypic synonym for Acinetobacter calcoaceticus subsp. anitratus Actinobacillus anseriformium biovar 1 Actinobacillus anseriformium biovar 2 Aeromonas veronii bv. sobria Aeromonas veronii bv. veronii Agrobacterium biovar 1, a synonym for Agrobacterium tumefaciens complex Agrobacterium biovar 2, a synonym for Agrobacterium rhizogenes Agrobacterium biovar 3, a synonym for Agrobacterium vitis Bacillus cereus biovar anthracis Bacillus cereus biovar anthracis str. CI Bacillus thuringiensis biovar tenebrionis, a synonym for Bacillus thuringiensis serovar tenebrionis Bacillus cereus biovar toyoi, a synonym for Bacillus toyonensis Bacillus wiedmannii bv. thuringiensis Pasteurella haemolytica biovar T, synonym of Bibersteinia trehalosi Bifidobacterium longum bv. Suis, homotypic synonym of Bifidobacterium longum subsp. suis Bisgaard taxon 3 biovar 1 Bradyrhizobium retamae bv. lupini Bradyrhizobium valentinum bv. lupini Brucella melitensis biovar Abortus, a synonym for Brucella abortus Brucella melitensis biovar Abortus 2308, a synonym for Brucella abortus 2308 Brucella abortus bv. 1 Brucella abortus bv. 1 str. 9-941 Brucella abortus bv. 2 Brucella abortus bv. 3 Brucella abortus bv. 4 Brucella melitensis biovar Canis, a synonym for Brucella canis Brucella melitensis biovar Melitensis Brucella melitensis bv. 1 Brucella melitensis bv. 2 Brucella melitensis bv. 3 Brucella melitensis biovar Neotomae, synonym for Brucella neotomae Brucella melitensis biovar Ovis, synonym for Brucella ovis Brucella melitensis biovar Suis, synonym for Brucella suis Brucella melitensis biovar Suis str. 1330, synonym for Brucella suis 1330 Brucella suis bv. 1 Brucella suis bv. 2 Campylobacter sputorum biovar faecalis Campylobacter sputorum biovar paraureolyticus Campylobacter sputorum biovar sputorum Candidatus Streptomyces philanthi bv. albopilosus Candidatus Streptomyces philanthi bv. barbiger Candidatus Streptomyces philanthi bv. basilaris Candidatus Streptomyces philanthi bv. bicinctus Candidatus Streptomyces philanthi bv. bilunatus Candidatus Streptomyces philanthi bv. capensis Candidatus Streptomyces philanthi bv. coarctatus Candidatus Streptomyces philanthi bv. crabroniformis Candidatus Streptomyces philanthi bv. crotoniphilus Candidatus Streptomyces philanthi bv. elongatus Candidatus Streptomyces philanthi bv. fuscipennis Candidatus Streptomyces philanthi bv. gibbosus Candidatus Streptomyces philanthi bv. gloriosus Candidatus Streptomyces philanthi bv. histrio Candidatus Streptomyces philanthi bv. inversus Candidatus Streptomyces philanthi bv. lepidus Candidatus Streptomyces philanthi bv. loefflingi Candidatus Streptomyces philanthi bv. multimaculatus Candidatus Streptomyces philanthi bv. pacificus Candidatus Streptomyces