[Rifampicin-resistant Mycobacterium bovis BCG strain isolated from an infant with NEMO mutation]. 2015

Cengiz Çavuşoğlu, and Neslihan Edeer Karaca, and Elif Azarsız, and Ezgi Ulusoy, and Necil Kütükçüler
Ege University Faculty of Medicine, Department of Medical Microbiology, Izmir, Turkey. cengizc2003@yahoo.com.

It is well known that disseminated Mycobacterium bovis BCG infection is developed after BCG vaccination in infants with congenital cellular immune deficiencies such as mutations in genes along the interleukin (IL)-12/interferon (IFN)-γ pathway and mutations in nuclear factor-kB essential modulator (NEMO). In this report, a rifampicin-resistant M.bovis BCG strain isolated from an infant with NEMO defect was presented. An 8-month-old male infant with NEMO defect admitted to the pediatric outpatient clinic of our hospital with fever, generalized lymphadenopathy and hepatosplenomegaly. Microscopic examination of the smears prepared from lymph node and liver biopsy specimens revealed abundant amount (3+) of acid-fast bacilli (AFB). Rifampicin-susceptible Mycobacterium tuberculosis complex (MTC) was detected by real-time PCR (GeneXpert MTB/RIF; Cepheid, USA) in the samples. The growth of mycobacteria was determined on the 20th day of culture performed in MGIT960 system (Becton Dickinson, USA). The isolate was identified as M.bovis BCG by GenoType MTBC kit (Hain Lifescience, Germany) and defined as M.bovis BCG [SIT 482 (BOV_1)] by spoligotyping. In the primary anti-tuberculosis drug susceptibility test performed by MGIT960 system, the isolate was found susceptible to rifampicin (RIF), isoniazid (INH), streptomycin (STM) and ethambutol (EMB). Then anti-tuberculosis treatment was started to the patient. However, the patient at the age of 2 years, re-admitted to the hospital with the complaint of hepatosplenomegaly. Smear of spontaneously draining abscess material obtained from subcutaneous nodules revealed intensive AFB positivity (3+) once again. In the present instance RIF-resistant MTC was detected with GeneXpert system in the specimen. The growth of mycobacteria was determined on the 13th day of culture and isolate was identified as M.bovis BCG. The present isolate was found susceptible to INH, STM and EMB but resistant to RIF. A mutation in the rpoB gene (codon 531, S531L) associated with RIF resistance was detected by using the partial sequencing of the rpoB gene. Patient died due to disseminated bovis BCG infection and multiple organ failure. To our knowledge, there are only six RIF-resistant M.bovis BCG strains isolated from patients in the literature. However, this is the first RIF-resistant M.bovis BCG strain isolated from a NEMO-deficient patient.

UI MeSH Term Description Entries
D007153 Immunologic Deficiency Syndromes Syndromes in which there is a deficiency or defect in the mechanisms of immunity, either cellular or humoral. Antibody Deficiency Syndrome,Deficiency Syndrome, Immunologic,Deficiency Syndromes, Antibody,Deficiency Syndromes, Immunologic,Immunologic Deficiency Syndrome,Immunological Deficiency Syndromes,Antibody Deficiency Syndromes,Deficiency Syndrome, Antibody,Deficiency Syndrome, Immunological,Deficiency Syndromes, Immunological,Immunological Deficiency Syndrome,Syndrome, Antibody Deficiency,Syndrome, Immunologic Deficiency,Syndrome, Immunological Deficiency,Syndromes, Antibody Deficiency,Syndromes, Immunologic Deficiency,Syndromes, Immunological Deficiency
D007223 Infant A child between 1 and 23 months of age. Infants
D008099 Liver A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances. Livers
D008198 Lymph Nodes They are oval or bean shaped bodies (1 - 30 mm in diameter) located along the lymphatic system. Lymph Node,Node, Lymph,Nodes, Lymph
D008297 Male Males
D009102 Multiple Organ Failure A progressive condition usually characterized by combined failure of several organs such as the lungs, liver, kidney, along with some clotting mechanisms, usually postinjury or postoperative. MODS,Multiple Organ Dysfunction Syndrome,Organ Dysfunction Syndrome, Multiple,Organ Failure, Multiple,Failure, Multiple Organ,Multiple Organ Failures
D009154 Mutation Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations. Mutations
D009163 Mycobacterium bovis The bovine variety of the tubercle bacillus. It is called also Mycobacterium tuberculosis var. bovis. BCG,Calmette-Guerin Bacillus
D004476 Ectodermal Dysplasia A group of hereditary disorders involving tissues and structures derived from the embryonic ectoderm. They are characterized by the presence of abnormalities at birth and involvement of both the epidermis and skin appendages. They are generally nonprogressive and diffuse. Various forms exist, including anhidrotic and hidrotic dysplasias, FOCAL DERMAL HYPOPLASIA, and aplasia cutis congenita. Anhidrotic Ectodermal Dysplasia,Aplasia Cutis Congenita,Clouston's Syndrome,Ectodermal Defect, Congenital,Hidrotic Ectodermal Dysplasia,Anhydrotic Ectodermal Dysplasia,Aplasia Cutis Congenita, Nonsyndromic,Autosomal Dominant Hidrotic Ectodermal Dysplasia,Clouston Hidrotic Ectodermal Dysplasia,Clouston Syndrome,Clouston's Hidrotic Ectodermal Dysplasia,Congenital Ectodermal Defect,Defect, Congenital Ectodermal,Ectodermal Dysplasia 2, Hidrotic,Ectodermal Dysplasia Anhidrotic,Ectodermal Dysplasia, Anhydrotic,Ectodermal Dysplasia, Hidrotic,Ectodermal Dysplasia, Hidrotic, Autosomal Dominant,Hidrotic Ectodermal Dysplasia, Autosomal Dominant,Hydrotic Ectodermal Dysplasia,Anhidrotic Ectodermal Dysplasias,Anhidrotic, Ectodermal Dysplasia,Anhidrotics, Ectodermal Dysplasia,Anhydrotic Ectodermal Dysplasias,Cloustons Syndrome,Congenital Ectodermal Defects,Defects, Congenital Ectodermal,Dysplasia Anhidrotic, Ectodermal,Dysplasia Anhidrotics, Ectodermal,Dysplasia, Anhidrotic Ectodermal,Dysplasia, Anhydrotic Ectodermal,Dysplasia, Ectodermal,Dysplasia, Hidrotic Ectodermal,Dysplasia, Hydrotic Ectodermal,Dysplasias, Anhidrotic Ectodermal,Dysplasias, Anhydrotic Ectodermal,Dysplasias, Ectodermal,Dysplasias, Hidrotic Ectodermal,Dysplasias, Hydrotic Ectodermal,Ectodermal Defects, Congenital,Ectodermal Dysplasia, Anhidrotic,Ectodermal Dysplasia, Hydrotic,Ectodermal Dysplasias,Ectodermal Dysplasias, Anhidrotic,Ectodermal Dysplasias, Anhydrotic,Ectodermal Dysplasias, Hydrotic,Hidrotic Ectodermal Dysplasias,Hydrotic Ectodermal Dysplasias,Syndrome, Clouston,Syndrome, Clouston's
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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