Mendelian susceptibility to mycobacterial disease in Egyptian children

Nermeen Galal, Jeannette Boutros, Aisha Marsafy, Xiao Fei Kong, Jacqueline Feinberg, Jean Laurent Casanova, Stéphanie Boisson-Dupuis, Jacinta Bustamante

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Background: Tuberculosis remains a major health problem in developing countries especially with the emergence of multidrug resistant strains. Mendelian Susceptibility to Mycobacterial Disease (MSMD) is a rare disorder with impaired immunity against mycobacterial pathogens. Reported MSMD etiologies highlight the crucial role of the Interferon gamma /Interleukin 12 (IFN-y/ IL-12) axis and the phagocyte respiratory burst axis. Purpose: Screen patients with possible presentations for MSMD. Methods: Patients with disseminated BCG infection following vaccination, atypical mycobacterial infections or recurrent tuberculosis infections were recruited from the Primary Immune Deficiency Clinic at Cairo University Specialized Pediatric Hospital, Egypt and immune and genetic laboratory investigations were conducted at Human Genetic of Infectious Diseases laboratory in Necker Medical School, France from 2005-2009. IFN-y level in patient's plasma as well as mutations in the eight previously identified MSMD-causing genes were explored. Results: Nine cases from eight (unrelated) kindreds were evaluated in detail. We detected a high level of IFN-y in plasma in one patient. Through Sanger sequencing, a homozygous mutation in the IFNGR1 gene at position 485 corresponding to an amino acid change from serine to phenylalanine (S485F), was detected in this patient. Conclusion: We report the first identified case of MSMD among Egyptian patients, including in particular a new IFNGR1 mutation underlying IFN-yR1 deficiency. The eight remaining patients need to be explored further. These findings have implications regarding the compulsory Bacillus.

Original languageEnglish (US)
Article numbere2012033
JournalMediterranean Journal of Hematology and Infectious Diseases
Issue number1
StatePublished - 2012
Externally publishedYes

ASJC Scopus subject areas

  • Hematology
  • Infectious Diseases


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