B - organism

- B abortus - B afzelii - B anthracis - B atrophaeus - B avium - B bovis - B bronchiseptica - B burgdorferi - B cepacia - B cereus - B coagulans - B coli - B divergens - B fragilis - B garinii - B hermsii - B holmesii - B hominis - B malayi - B mandrillaris - B mayonii - B microti - B miyamotoi - B parapertussis - B pertussis - B procyonis - B pullicaecorum - B recurrentis - B species wa-1 - B species wa1 - B subtilis - B timori - B valaisiana - B wa-1 - B wadsworthia - B. cepacia - B. pertussis - Babesia bovis - Babesia divergens - Babesia duncani WA1 - Babesia microti - Babesia species wa1 - Babesia wa1 - bacilli - Bacillus anthracis - Bacillus atrophaeus - Bacillus cereus - Bacillus coagulans - Bacillus fragilis - Bacillus subtilis - bacteriophage - Bacteroides - Bacteroides fragilis - Bacteroidetes - Balamuthia - Balamuthia mandrillaris - Balantidiasis - Balantidium coli - Barmah Forest virus - Barnesiella - Bartonella - Bartonella bacilliformis - Bartonella henselae - Bartonella quintana - Bartonella vinsonii - Baylisascaris - Baylisascaris procyonis - bedbug - beef tapeworm - Beta hemolytic streptococci - Beta streptococci - Beta streptococcus - beta-hemolytic streptococcus - Bifidobacterium - Bilophila wadsworthia - Bird flu - Bk polyomavirus - BK virus - black flies - black widow spider - Blastocystis hominis - Blomia (house dust mite) - Bocavirus - body louse - Bordetella avium - Bordetella bronchiseptica - Bordetella holmesii - Bordetella parapertussis - Bordetella pertussis - Borna disease virus - Borrelia - Borrelia afzelii - Borrelia burgdorferi - Borrelia garinii - Borrelia hermsii - Borrelia mayonii - Borrelia miyamotoi - Borrelia recurrentis - Borrelia valaisiana - Bourbon virus - Brachyspira - Branhamella catarrhalis - Brevibacteria - Brevibacterium - brown recluse spider - Brucella - Brucella abortus - Brugia malayi - Brugia timori - bunyaviridae - Burkholderia cepacia - Burkholderia mallei - Burkholderia pseudomallei - Butyricicoccus - Butyricicoccus pullicaecorum