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Opposition to the Proposal to Replace the Family Name Enterobacteriaceae F DON J

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Opposition to the Proposal to Replace the Family Name Enterobacteriaceae F DON J INTERNATIONALJOURNAL OF SYSTEMATICBACTERIOLOGY, Oct. 1983, p. 892-895 Vol. 33. No. 4 0020-7713/83/040892-04$02.00/0 Opposition to the Proposal to Replace the Family Name Enterobacteriaceae f DON J. BRENNER Molecular Biology Laboratory, Division of Bacterial Diseuses, Centers for Infectious Diseuses, Centers for Diseuse Cont rol, A tla nt a , Georgia 30333 The Subcommittee on the Taxonomy of Enterohacteriuceae unanimously recommends that the proposal to replace the family name Enterobacteriaceae with Escherichiaceae be rejected by the Judicial Commission. The arguments in support of this recommendation are as follows: (i) Enterohacteriaceae is a legitimate name that has been specifically conserved as an exception to Rule 9 of the International Code of Nomenclature of Bacteria; (ii) the continued use of this name satisfies Principle 1 of the Bacteriological Code (to “aim at stability of names; avoid or reject the use of names which may cause error or confusion; and avoid the useless creation of names”); and (iii) Enterohacteriaceae is also specifically in accord with General Consideration 6, Principles 1, 8, and 9, Rules 21b, 23a, and 56b, and Opinion 15 of the Bacteriologicul Code, whereas the proposal to use Escherichiaceae violates each of these portions of the Bacterio- logical Code. Goodfellow and Triiper proposed the name A brief historical look at the name Enterohuc- Escherichiaceae to replace the family name En- teriacetie should be helpful. The family name terobacteriaceae (7). These authors argued that Enterobacteriuceae was proposed by Rahn in “Enterobacteriaceae is not formed in accord 1937 (13). This family had one genus, Entero- with the rules of bacteriological nomenclature,” hacter, which included species that had previ- that “Enterobacteriaceae is the only exception ously been in the genera “Aerobacter,” to the rule stating how family names should be “Eherthella, ” Erwinia, Escherichia, Klebsiella, formed,” and that this exception is maintained Proteus, Salmonella, Serratia, and Shigella, as for “merely historical reasons.” In this report, well as strains of Achromobacter, Flavobacteri- the Subcommittee on the Taxonomy of Entero- um, and Pseudomonas. A description was not bacteriaceae (Enterohacteriaceae Subcommit- given for the family or for the genus, and a type tee) goes on record against the proposal of what strain was not designated (4, 13). When the first is, in our opinion, the illegitimate name Escheri- International Bacteriological Code of Nomen- chiaceae and recommends the continued use of clature was adopted in 1948 (l),both Enterobac- the legitimate and conserved name Enterobac- teriaceae Rahn 1937 and Enterohacter Rahn teriaceae. became illegitimate because they were not in In June 1979, a similar proposal-to change accord with all of the rules, which were retroac- the family name Enterohacteriaceae to “Entero- tive. bacteraceae”-was made by Lapage (10). The In 1957, a formal proposal was made to the Judicial Commission denied this request (14). Judicial Commission to conserve the family Detailed opposition to the Lapage proposal was name Enterobacteriaceae and to make Esche- published (5, 6), and much of the rebuttal to the richia its type genus and Escherichia coli its type Lapage proposal applies equally well to the species (2). This proposal was approved in Opin- proposal of Goodfellow and Triiper to change ion 15 of the Judicial Commission, issued in the family name. The most pertinent points are 1958, and the family name formally became summarized below, but readers are invited to Enterobacteriaceae Rahn 1937 nom. fam. cons. refer to a paper by Farmer et al. for a full (Opin. 15, Jud. Comm. 1958) (3, 9). The name discussion of the objections to changing the Enterobacteriaceae became universally accept- name En t ero ha c t e r iacea e (5). ed and was not questioned again until 1973, when the Judicial Commission noted that al- though this name had not been formed according t Submitted for the Subcommittee on the Taxonomy of to Rule 3 of the 1958 International Code of Enterobacteriaceae and based on discussions held at the International Congress of Microbiology, August 1982, Boston, Nomenclature of Bacteria and Viruses, it had Mass., and material circulated to each member of the Subcom- been conserved (12). The Judicial Commission mittee. asked the Enterobacteriaceae subcommittee for 892 VOL. 33, 1983 FAMILY NAME ENTEROBACTERIACEAE 893 a recommendation on this question. In 1975, The 15 was adopted. Once adopted, Opinions are Enterobacteriaceae Subcommittee voted 12 to 2 part of the rules of nomenclature; thus, Entero- to retain the name Enterobacteriaceae. It is bacteriaceae is a legitimate name, not an illegiti- important to note that the Enterobacteriuceae mate name as is often stated by those who wish Subcommittee members were specifically asked to change it. Enterobacteriaceae is maintained to choose one of three names; 12 members voted because it conforms to the rules of nomenclature to keep Enterobacteriaceae, 2 members voted to as specifically covered by Opinion 15 and be- change the family name to “Enterobactera- cause it is probably the most widely known and ceae,” and none voted to change the name to accepted family name in bacteriology. The valid- Escherichiaceae. A revised version ofthe Znter- ity of Opinion 15 and the validity of the name national Code of Nomenclature of Bacteria ap- Enterobacteriaceae have repeatedly been reaf- peared in 1975 (ll), in which Opinion 15, con- firmed in Judicial Commission actions and in the serving Enterobacteriaceae, was reaffirmed. Bacteriological Code for 25 years. In actual In the minutes of their 1978 meeting (pub- practice, Escherichiaceae has been used in the lished in 1979), the members of the Judicial literature once (7), whereas since its introduc- Commission voted to reverse Opinion 15. The tion Enterobacteriaceae has been used, by con- Commission “proposed to conserve the family servative estimates, more than 100,000 times (5). name ‘Enterobacteraceae’ with the type genus A name change would cause a tremendous Enterobacter on the grounds that this would amount of confusion for all nonexperts. It would cause less disturbance than the change to the be particularly difficult for computer program- family name Escherichiaceae with the type ge- mers and those who use computer abstract nus Escherichia” (8). The proposal to change searches. Every program currently in use would the family name to “Enterobacteraceae” was have to be altered to cross-reference Enterobac- formally made by Lapage (10). The Enterobac- teriaceae and Escherichiaceae, a time-consum- teriaceae Subcommittee voted 11 to 0 against ing and expensive task. this proposal, and the American Society for Those who oppose the name Enterobac- Microbiology Subcommittee on Gram-Negative teriaceae have never argued that it is confusing Facultatively Anaerobic Fermentative Rods or misunderstood. Their arguments have been (ASM Subcommittee) voted 7 to 0 against it. solely on the basis that Enterohacteriaceae was Arguments against the proposal were published not formed in accordance with Rule 9 of the 1975 in 1980 (5,6).In 1981 the proposal of Lapage to Bacteriological Code (7, 8, 10). Rule 9 states: change the family name to “Enterobactera- “Names of taxonomic groups (taxa) between ceae” was rejected by the Judicial Commission suborder and genus are formed by the addition (14). of the appropriate suffix to the stem of the name Since the proposal of Goodfellow and Truper of the type genus” (11). Enterobacteriaceae has to change the family name to Escherichiaceae an extra i and does not represent the type genus, was published in 1982, both the Enterobac- which is Escherichia. Although Enterobac- teriaceae Subcommittee and the ASM Subcom- teriaceae does not satisfy Rule 9, it is totally in mittee have unanimously voted (9 to 0 and 8 to 0, accordance with the rules of nomenclature be- respectively) against it. These votes are not cause it was specifically excepted from Rule 9 surprising since the Judicial Commission stated by having been conserved in Opinion 15 (11) (see above) that Escherichiaceae would cause under the Bacteriological Code. This and other more disturbance than “Enterobacteraceae’ ’ exceptions to the rules of nomenclature have (8), and both the Enterobacteriaceae Subcom- been allowed, in accordance with many of the mittee and the ASM Subcommittee have taken a principles and rules of nomenclature. similar view in votes and in discussions. General Consideration 6 of the Code allows The people who work closely with Enterobac- “for emendations of rules” and “for special teriaceae have consistently voted either unani- exceptions to the rules” (11). The conservation mously or overwhelmingly to keep the name. of Enterobacteriaceae under Rule 21b (12) in The objections of the Enterohacteriaceae Sub- Opinion 15 is such an exception. Rule 21b states: committee to the proposal of Escherichiaceae “If the name of a family was not made in are given below. conformity with Rule 21a but its name has been Goodfellow and Truper stated that Enterobac- conserved, then the type genus may be fixed by teriaceae is not formed according to the rules of an Opinion of the Judicial Commission.” The bacteriological nomenclature and that the name following example is given: “The genus Esche- is retained for “merely historical reasons” (7). richia is the type genus of the family Enterobac- When Enterobacteriaceae was formed, there teriaceae (Opinion 15).” Thus, Rule 21b and was no Bacteriological Code. The name became Opinion 15 specifically make Enterobac- conserved, legitimate, and in accordance with teriaceae a legitimate name under the Bacterio- the rules of nomenclature in 1958 when Opinion logical Code. 894 BRENNER INT. J. SYST.BACTERIOL. Principle 1 (11) states: “The essential points in avoidance of confusion in nomenclature. The nomenclature are . (1) aim at stability of proposal of Escherichiaceae is in conflict with names, (2) avoid or reject the use of names Principle 1 because from a practical standpoint, which may cause error or confusion, (3) avoid the proposed name change would cause confu- the useless creation of names.” Retention of the sion and consternation.
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