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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo International Journal of Systematic and Evolutionary Microbiology

Volume 75, Issue 2

sp. nov., a novel bacterium isolated from stable foams formed in wastewater treatment plants and emended description of the genus No Access

Abstract

Three strains, designated as J27, J71 and J72, belonging to the genus , were isolated from stable foams formed in activated sludge wastewater treatment plants (WWTPs) in New South Wales, Australia. Phenotypic and genomic analyses revealed that these strains belong to the family and are closely related to . However, distinct genomic and physiological characteristics, including overall genomic relatedness indices, phylogenomic analysis, genomic metabolic profiles and MALDI-TOF MS (Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry), confirmed their status as a new species.

Ecologically, these strains showed a wide metabolic versatility, like enhanced membrane transport systems for amino acids, metals and phosphate, as well as the ability to synthesize mycolic acids, contributing to their hydrophobic nature and involvement in foam stabilization. Their adaptations likely provide a competitive advantage in WWTPs, where they persist in nutrient-rich, metal-laden and foam-stabilizing environments. The species did not present the typical rod-coccus cycle, described previously as a defining characteristic of the genus. Based on their unique genomic, phenotypic and ecological features, we propose the name sp. nov., with strain J71 (JCM 34493, NCIMB 15450) designated as the type strain. Additional strains include J27 (JCM 33914, NCIMB 15449) and J72 (NCIMB 15448).

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): Actinomycetota , Antrihabitans , Nocardiaceae , stable foams and wastewater treatment plant
Funding
This study was supported by the:
  • Universidad de Salamanca (Award NA)
    • Principal Award Recipient: JhonA. Suescún-Sepúlveda
  • Ministerio de Universidades (Award C21.I4.P1)
    • Principal Award Recipient: Riesco JarrinRaul
  • Ministerio de Ciencia e Innovación (Award TED2021-131105B-I00)
    • Principal Award Recipient: MarthaE. Trujillo
  • Ministerio de Ciencia e Innovación (Award PID2021-124068NB-I00)
    • Principal Award Recipient: MarthaE. Trujillo
© 2025 The Authors
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2026-04-13

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Antrihabitans spumae sp. nov., a novel bacterium isolated from stable foams formed in wastewater treatment plants and emended description of the genus Antrihabitans
Int J Syst Evol Microbiol 75, 006695 (2025); https://doi.org/10.1099/ijsem.0.006695
/content/journal/ijsem/10.1099/ijsem.0.006695
/content/journal/ijsem/10.1099/ijsem.0.006695
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