1. O'Garra A, Redford PS, McNab FW, Bloom CI, Wilkinson RJ,and Berry M PR. . The Immune Response in Tuberculosis. · Annual Review of Immunology. 2013;31: 475-527
2. World Health Organization. Tuberculosis; key fact global TB report 2018.
3.Black GF, Fine PEM, Warndorff DK et al. Relationship between IFN-gamma and skin test resposiveness to Mycobacterium tuberculosis PPD in healthy, non-BCG-vaccinated young adults in Northern Malawi. The International Journal of Lung Diseases2001; 5:664-72.
4. Storgaard L, Rodrigues A, Martins C, et al. Development of BCG Scar and Subsequent Morbidity and Mortality in Rural Guinea-Bissau. Clin Infect Dis. 2015; 61:950–959. doi: 10.1093/cid/civ452.
5.World Health Organization. Global tuberculosis programme and global programme on vaccines. Statement on BCG revaccination for the prevention of tuberculosis. Wkly Epidemiol Rec. 1995;70(32):229–31.
6. Jason J, Archibald LK, Nwanyanwu OC et al. Clinical and immune impact of Mycobacterium bovis BCG vaccination scarring. Infection and Immunity 2002; 70:6188-95.
7. Santiago EM, Lawson E, Gillenwater K, Kalangi S, Lescano AG, Du Quella G, et al. A Prospective Study of Bacillus Calmette-Guérin Scar Formation and Tuberculin Skin Test Reactivity in Infants in Lima, Peru. Pediatrics. 2003; 112:e298. [
8.Sherjil A, Col Iqbal J. Absence of scar formation in infants after BCG vaccination. Professional Med J. 2006;13: 637–41.
9. Atimati AO, Osarogiagbon OW. Prevalence of BCG scar among BCG-vaccinated children in a southern Nigeria tertiary hospital. Niger J Paed. 2014;41: 229–33.
10.Nelson LJ, Wells CD. Global epidemiology of childhood tuberculosis. Int J Tuberc Lung Dis. 2004;8:636–647.
11. Hemmati M, Ghadiri K, , and Rezaei M. Tuberculin Reactivity in School Age Children; Five-year Follow-up in Iran. Iran J Pediatr Mar 2011; Vol 21 (No 1), Pp:39-44
12. National TB program, Sudan 2012.
13. Chee CB, Soh CH, Boudville IC, Chor SS, Wang YT. Interpretation of the tuberculin skin test in Mycobacterium bovis BCG-vaccinated Singaporean schoolchildren. Am J Respir Crit Care Med. 2001;164(6):958-61
14.Pang Y, Kang W, Zhao A, Liu G, Du W, Xu M, Wang G, Zhao Y,Zheng S. The effect of bacille Calmette-Guérin vaccination at birth on immune response in China. Vaccine 2015; 33 (1):209-213.
15. Hu Y, Chen Y, Liang H, and Wang Y. An Overview of Coverage of BCG Vaccination and Its Determinants Based on Data from the Coverage Survey in Zhejiang Province. Int J Environ Res Public Health. 2018; 15(6): 1155
16.Ismaiel WMA, Khalil EAG, Bygbjerg C, Osman FM, Musa AM & El-Hassan AM. Coverage and efficacy of BCG vaccination in displaced populations: a measure of effectiveness of an Expanded Programme of Immunization. Khartoum Medical Journal 2008; 1(1): 30-33
17.Addo KK, van den Hof S, Mensah GI, Hesse A, Bonsu C, Koram KA, Afutu FK, Bonsu FA. A tuberculin skin test survey among Ghanaian school children. BMC Public Health. 2010;10:35. doi: 10.1186/1471-2458-10-35.
18.Gambo MJ, Lawan UM, Ahmad HR, Ogala WN. Assessment of tuberculin reactivity of
BCG‑vaccinated infants in Zaria, Nigeria. Nigerian Journal of Basic and Clinical Sciences. 2014; 11 (2)
19. Beshir MR, Zidan AE, El-Saadny HF, Ramadan RA, KaramNA, Amin EK, Mohamed MZ, and Abdelsamad NM. Evaluation of the Immune Response to Interferon Gamma Release Assay and tuberculin Skin Test Among BCG Vaccinated Children in East of Egypt A Cross-Sectional Study.(Medicine . 2016; 95(17):e3470)
20. Lee S W, Oh SY, Lee JB, Choi CM, Kim HJ. Tuberculin Skin Test Distribution following a Change in BCG Vaccination Policy. Plos. 2014;23. https://doi.org/10.1371/journal.pone.0086419
21. Garly M, Martins CL, Balé C, Baldé MA, Hedegaard KL, Gustafson P, et al. BCG scar and positive tuberculin reaction associated with reduced child mortality in West Africa A non-specific beneficial effect of BCG? Vaccine.2003; 21: 2782–2790.
22. World health organization. Information Sheet Observed Rate of Vaccine Reactions Bacille Calmette-Guérin (Bcg). Global Vaccine Safety, Immunization, Vaccines and Biologicals 20, avenue Appia, Ch-1211 Geneva 27, 2012.
23.Liu J TV, Leung AS, Alexander DC, Zhu B. BCG vaccines: their mechanisms of attenuation and impact on safety and protective efficacy. Hum Vaccin. 2009; 5: 70–78.
24.Ritz N, Hanekom WA, Robins-Browne R, Britton WJ and Curtis N. Influence of BCG vaccine strain on the immune response and Protection against tuberculosis. FEMS Microbiol Rev. 2008; 32: 821–841
25.Birk NM, Nissen TN, Ladekarl M, Zingmark V, Kjærgaard J, Jensen TM, Jensen SK, et al. The association between Bacillus Calmette-Guérin vaccination (1331 SSI) skin reaction and subsequent scar development in infants. BMC Infect Dis. 2017; 17. doi: 10.1186/s12879-017-2641-0
26.Dommergues MA, de La Rocque F, Guy C, Lécuyer A, Jacquet A, Guérin N, et al. Local and regional adverse reactions to BCG-SSI vaccination: a 12-month cohort follow-up study. Vaccine 2009; 27:6967-73.
27. Grindulus H, Hayham MIB, Scolt PH, Thompson RD, Wharton BA. Tuberculin response two years after BCG vaccination at birth. Arch Dis Child 1984; 59: 614- 619.
28. Bowerman, R. J. Tuberculin skin testing in BCG-vaccinated populations of adults and children at high risk for tuberculosis in Taiwan. The International Journal of Tuberculosis and Lung Disease 2004; 8 (10):1228-1233 (6)
29.Seddon JA, Paton J, Nademi Z, Keane D,Williams B, Williams A, Welch SB, Liebeschutz S, Riddell A, Bernatoniene J , Patel S, Martinez-Alier N, McMaster P, Kampmann1 B. The impact of BCG vaccination on tuberculin skin test responses in children is age dependent: evidence to be considered when screening children for tuberculosis infection. Thorax 2016;0:1–8. doi:10.1136/thoraxjnl-2015-207687
30. Minime-Lingoupou F, Ouambita-Mabo R, Komangoya-Nzozo A, Senekian D, Bate L, YangoF, Nambea B and Manirakiza A. Current tuberculin reactivity of school children in the Central African Republic. BMC Public Health (2015) 15:496. doi 10.1186/s12889-015-1829-8.
31. Sayyahfar S , Karimi A, Fahimzad A, Shamshiri AR. Comparison of Tuberculin Skin Test result and interferon gamma response to human PPD in BCG scar positive and negative children. Journal of Epidemiology and Global health. 2014; 4(1): 45-50
32. Piñeiro R, Cilleruelo MJ, García-Hortelano M, García-Ascaso M, Medina-Claros A, Mellado MJ. Effect of nutritional status on Tuberculin skin testing. Indian J Pediatr. 2013;80(4):271-5. doi: 10.1007/s12098-012-0773-1.
33. Bozaykut A, Atay E, Sevim H, Atay Z, Ceran O. Effect of BCG vaccine on tuberculin skin tests in 7–11‐year‐old children. Acta pediatrica. 2007.
https://doi.org/10.1111/j.1651-2227.2004.tb02713.x
34.Cobat AL, Barrera LF, Henao H, Arbela´ ez P, Abel L, Garc LF, Schurr Eand Alca A. Tuberculin Skin Test Reactivity Is Dependent on Host Genetic Background in Colombian Tuberculosis Household Contacts, Brief report CID 2012
35. Dhanawade SS, Kumbhar SG, Gore AD, and Patil VN. Scar formation and tuberculin conversion following BCG vaccination in infants: A prospective cohort study. J Family Med Prim Care. 2015; 4(3): 384–387. doi: 10.4103/2249-4863.161327
36.Jentoft HF, Omenaas E, EIDE GE, and Gulsvik A. Tuberculin reactivity: prevalence and predictors in BCG-vaccinated young Norwegian adults. Pediatric Medicine.2002; l(96) 1033-1039
37. Shingadia D, Novelli V. Diagnosis and treatment of tuberculosis in children. Lancet Infect Dis. 2003; 3: 624–632.
38. Kiwanuka JP. Interpretation of tuberculin skin-test results in the diagnosis of tuberculosis in children. African Health Sciences 2005; 5 (2).
39. Chan PC, Chang LY, Wu YC, Lu CY, Kuo HS, Lee CY, Huang LM, Chen CJ. Age-specific cut-offs for the tuberculin skin test to detect latent tuberculosis in BCG-vaccinated children. Int J Tuberc Lung Dis. 2008 Dec;12(12):1401-6.
40. WFP. A Comprehensive Food Security Assessment in Kassala State, Sudan, UN World Food programme, Kassala State Ministry. 2012.