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An infectious bronchitis virus Mass-like strain from Brazil causing kidney damage and tropism in a broiler flock
  1. Filipe Santos Fernando1,
  2. Thaiane Coelho Kasmanas1,
  3. Priscila Diniz Lopes1,
  4. Helio José Montassier1 and
  5. Mário Sérgio Assayag Jr2
  1. 1 Department of Veterinary Pathology, Laboratory of Virology and Immunology, Universidade Estadual Paulista Júlio de Mesquita Filho (FCAV– UNESP), Jaboticabal, São Paulo, Brazil
  2. 2 Department of Virology, Animal Health Laboratory, Nuporanga, São Paulo, Brazil
  1. Correspondence to Dr Filipe Santos Fernando; filipe.fernando{at}


In this case, the authors showed an infectious bronchitis virus (IBV) strain from Massachusetts (Mass) genotype with nephropathogenic characteristics. This virus has great importance for causing damage to poultry production related to feed conversion, association with secondary infections and carcass condemnation in the slaughterhouse. IBV comprises several genotypes, and among these genotypes some pathogenic characteristics are specific, such as the strong pathogenesis of some Mass strains for the respiratory tract. However, the authors isolated IBV/Brazil/NUP/0316 strain and showed that when isolated from broilers it causes mild to moderate renal damage, besides presenting high amino acid sequence identity with other pathogenic strains isolated in countries far from Brazil.

  • Ibv
  • chicken
  • Massachusetts
  • nephropathogenic
  • pathogenicity
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  • Contributors Field Study: FSF, TCK, MSA. Virus Isolation: FSF, TCK. RT-qPCR: FSF, TCK. RT-PCR and sequencing: FSF, TCK, PDL, HJM. Histopathology: FSF, TCK. Redaction: FSF, TCK, PDL, MSA.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Data sharing statement There are no additional data available for this paper.

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