Tuberculin Skin Test Research Articles

English

Objective: To measure Tuberculin Skin Test (TST) at 48 and 72 hours and, if there are differences, to determine the concordance and whether it is of clinical significance (change in the TST score). Material and method: Prospective study of those admitted to prison between March and June 2023, screened by means of TST read at 48 and 72 hours by trained personnel, assessed according to criteria in force in Spain. When the measurement varied, concordance was checked using the kappa index and its clinical significance. To determine variables associated with clinical significance, bivariate and mutivariate analysis was performed using logistic regression. Results: 488 cases were studied. TST was positive in 20.1, 23.4 and 23.8% at 48 hours, 72 hours or any of them, respectively.There was more TST positive in foreigners or BCG vaccinated. The reading varied in 35.2% (mean deviation 5.5 +/–4.4 mm) and was higher at 72 hours (86% of different cases). Inter-reading concordance was excellent overall (κ = 0.892) and in BCG vaccinated (κ = 0.805), but moderate in immunocompromised (κ = 0.421). Discordance was clinically significant in 3.7% and was not associated with any variable. Discussion: TST concordance at 48-72 hours is excellent, but in some patients (3.7% in this work) the score is incorrect, more so in readings at 48 hours. The proportion is low, but can be reduced if the reading is taken at 72 hours and Interferon Gamma Release Assay tests are used in some cases (immunocompromised, etc.).

Novel tuberculosis skin tests for detecting latent tuberculosis infection.

Dear Editor, We are impressed by the article titled "Latent tuberculosis diagnostics: current scenario and review" by Gupta et al. published in your journal. The authors have reviewed the tests used for diagnosis of latent tuberculosis infection and have given a detailed overview of the purified protein derivative-based tuberculin skin test and interferon γ release assays. We would like to draw attention to the fact that in 2022, the World Health Organization has also recommended the use of Mycobacterium tuberculosis antigen-based skin tests for the diagnosis of latent tuberculosis (conditional recommendation, very low certainty of evidence).

Effect of CD4 count on Mycobacterium tuberculosis infection rates in people living with HIV: a comparative study in prison and community

To evaluate the impact of the CD4 count on ESAT6-CFP10 (EC) skin test, QuantiFERON-TB Gold In-tube test (QFT) and tuberculin skin test (TST) in a large prison and communities in Jiangsu Province among people living with HIV (PLHIV). Participants in communities were tested with the QFT and EC skin test and in prison were tested with the QFT, TST and EC skin test. A 4-knotted restricted cubic spline fitted for Logistic models was used to explore the cutoff point of CD4 count and the associations between changes in CD4 count and Mycobacterium tuberculosis (M.tb) infection. Among 1,815 PLHIV included, 19.3% (350) were from prisons and 80.7% (1465) were identified through community screenings. M.tb infection rates were 12.2% and 8.3% through QFT and EC tests, respectively. Odd Ratios (ORs) for infection increased with CD4 counts, peaking at 618 cells/mm3 for EC, 392 cells/mm3 for QFT, then plateaued. However, the pattern differed for EC between prison and screening scenarios. In prison settings, M.tb infection increased with CD4 count from 0 to 350 cells/mm3, plateaued until 500 cells/mm3, and then persistently increased. Conversely, for community, ORs decreased until 300 cells/mm3, followed by an increase between 300 and 729 cells/mm3, after which they continued to rise persistently. Our cross-sectional study among PLHIV revealed a higher rate of M.tb infection in prison compared to the community. The relationship between CD4 count and infection became negative after a certain threshold. This pivotal point differed with detection methods, with QFT showing lower CD4 thresholds than EC.

Mycobacterium tuberculosis infection and tuberculosis disease in the first decade of life: a South African birth cohort study

Paediatric tuberculosis leads to more than 200 000 deaths annually. We aimed to investigate the incidence of Mycobacterium tuberculosis infection and tuberculosis disease in the first decade of life in the Drakenstein Child Health Study (DCHS), a South African cohort in a community with high tuberculosis and HIV incidence. In this prospective birth cohort study, we enrolled pregnant women aged 18 years or older who were between 20 and 28 weeks' of gestation in a peri-urban setting outside of Cape Town, South Africa. We followed up their children for tuberculosis until age 10 years. To measure M tuberculosis infection tuberculin skin tests were administered to children at age 6 months, 12 months, and then annually in children with a negative test, and at the time of a lower respiratory tract infection. Tuberculin skin test conversion was defined by an induration reaction of 10 mm or more. To measure tuberculosis disease, active surveillance was done throughout follow-up. Each episode of presumed tuberculosis disease was investigated using sputum induction, tested with Xpert MTB/RIF and liquid culture for M tuberculosis. Survival analyses were performed and multivariable Cox regression was used to measure factors associated with M tuberculosis infection or disease. Between March 5, 2012, and March 31, 2015, 1137 women and their 1143 children (248 [21·7%] of 1143 children were HIV-exposed, two [0·2%] children with HIV) were included in the analysis. Children were followed up for 8870 person-years (median follow-up 9·1 years [IQR 8·2-10·2]). The annual risk of tuberculin conversion during follow-up was 6·6 infections per 100 person-years (95% CI 5·8-7·3) but ranged from 4-9 infections per 100 person-years over the follow-up period. 98 children developed tuberculosis (1105 cases per 100 000 person-years; 95% CI 906-1347). The cumulative hazard of tuberculin conversion was 36% (95% CI 32-41) at age 8 years and the cumulative hazard of tuberculosis disease was 10% (8-12) at age 10 years. Preventive treatment was associated with a reduction in tuberculosis disease among children who had tuberculin conversion (adjusted hazard ratio 0·23 [95% CI 0·12-0·47]). Most cases of tuberculosis disease (78 [79%; 95% CI 69-86] of 98 children) occurred among children who had tuberculin skin test conversion but were not administered preventive treatment. In this prospective South African birth cohort, M tuberculosis transmission was consistently high throughout the first decade of life leading to approximately 10% of children developing tuberculosis disease. A multipronged approach to decrease paediatric tuberculosis is needed that combines preventive treatment for children at risk, reducing community M tuberculosis transmission, and active case finding. Bill & Melinda Gates Foundation, Medical Research Council South Africa, and National Research Foundation South Africa.

Accuracy of Xpert and alternative sampling methods to diagnose childhood pulmonary tuberculosis, a prospective cohort study

ObjectivesThe aim of the study was to estimate sensitivity and specificity of childhood pulmonary tuberculosis (CPTB) diagnostic tests, including Xpert and alternative samples such as nasopharyngeal aspirate and stool. We used latent class analysis to overcome the lack of gold standard. MethodsWe included 1165 children suspected of having CPTB in a prospective cohort study conducted in Ivory Coast, Madagascar, and Cameroon. We used Bayesian latent class analysis to evaluate the performance of multiple diagnostic tests for CPTB: smear microscopy, mycobacterial culture, and Xpert MTB/RIF carried out on different types of samples (sputum after 10 years of age, gastric aspirate before 10 of age, nasopharyngeal aspirate, stool), tuberculin skin test (TST), and chest X-ray. ResultsMedian age was 3.5 years (95% credible interval [1.3–8.2]). Smear microscopy was highly specific in all types of samples but lacked sensitivity (sputum 31% (95% credible interval [18–46]), gastric aspirate 36% [27–45], nasopharyngeal aspirate 24% [17–32], stool 24% [17–32]). Culture sensitivity was slightly higher in gastric (75% [65–83]) than nasopharyngeal aspirate (64% [54–72]). Xpert sensitivity was similar in gastric (69% [59–78]) and nasopharyngeal aspirate (66% [57–74]) but lower in sputum (58% [43–74]) and stools (53% [44–62]). Xpert was highly specific in all respiratory samples (sputum 96% [96–100], gastric aspirate 100% [99–100], nasopharyngeal aspirate 100% [99–100]). ConclusionsXpert performed on nasopharyngeal aspirate shows similar accuracy than culture. It was also similar to that in gastric aspirate. It highlights it’s an interesting CPTB diagnostic combination.

Polymerase Chain Reaction for Detection of Mycobacterium tuberculosis in Granulomatous Anterior Uveitis – An Analysis of 51 Eyes

ABSTRACT Purpose To evaluate the role of polymerase chain reaction (PCR) in detecting Mycobacterium tuberculosis (MTb) in granulomatous anterior uveitis and comparing the results with those of Mantoux test, QuantiFERON-TB Gold test, and High-Resolution Computed Tomography of Chest (HRCT-chest). Methods Data of 51 eyes of 38 patients with clinical features of granulomatous anterior uveitis undergoing anterior chamber fluid aspiration for PCR for MTb targeting IS6110 and MPB64 were studied. Results Out of 38 patients, 25 (65.8%) were positive for MTb genome on PCR. 24 patients were tested for Mantoux, out of which 12 patients (50%) were positive and 12 patients (50%) were negative. 22 out of 38 patients had undergone QuantiFERON-TB Gold (QFT) test, out of which 10 (45.5%) were positive and 12 (54.5%) were negative. 36 out of 38 patients had undergone HRCT. Eight out of 38 (21.1%) patients had significant findings in HRCT-chest, as well as PCR positivity for MTb genome while 12 (31.6%) patients did not have any significant findings on HRCT-chest, but were positive for PCR. Conclusion PCR for MTb is a valuable tool in the diagnosis of tubercular anterior uveitis. PCR can be positive even in cases of negative Mantoux test, QFT, and HRCT-chest in granulomatous anterior uveitis.

Clinical spectrum of pediatric tuberculosis and early diagnosis by clinical, radiological, and CBNAAT in a Tertiary Care Teaching Hospital in South India

Background: In India, an estimated 220,000 children contract tuberculosis (TB) annually, yet the absence of a gold standard test hinders effective diagnosis and reporting of childhood TB. Objective: This study aimed to analyse the clinical profile of childhood tuberculosis, utilizing relevant laboratory investigations for early diagnosis. Methods: A cross-sectional observational study was conducted at a tertiary care hospital in South India from October 2019 to October 2021. Children under 18 with tuberculosis were included. Data on demographics, symptoms, family TB history, nutritional status, and clinical findings were collected. Laboratory tests included complete blood count, ESR, Mantoux test, chest X-rays, and sputum analyses for acid-fast bacilli (AFB). Results: Among 54 children, the most common age group was over 10 years (51.3%), with a male preponderance (53.3%). Pulmonary TB was diagnosed in 44.4% of cases, while 55.5% had extrapulmonary TB, predominantly pleural (40%). Fever (60.5%) and cough (42.7%) were the most common symptoms. The Mantoux test was reactive in 40.7% of patients, particularly among the undernourished. Chest X-rays indicated TB in 93.25% of pulmonary cases, while CBNAAT showed positive results in 10 cases, with a sensitivity of 18.8% and specificity of 81.25%. Conclusions: Diagnosing childhood TB remains complex, relying on symptom evaluation, clinical history, and laboratory tests. Despite advances in diagnostic methods, negative CBNAAT results do not exclude TB, highlighting the need for thorough clinical assessment and investigation.

Reactive arthritis in connective tissue diseases; one should be vigilant for joint tuberculosis.

The incidence of tuberculosis (TB) is increasing worldwide. Bone and joint TB are the most common types of extra-pulmonary TB, but can easily be misdiagnosed, since articular TB commonly mimics other joint diseases, including reactive and degenerative arthritis, and articular manifestations associated with systemic autoimmune diseases. Furthermore, patients with systemic auto-immune diseases are often more prone to mycobacterial infection. The diagnosis of joint TB can be made using a combination of the following methods: clinical evaluation, imaging, tuberculin skin test, interferon-gamma release assays, nucleic acid amplification tests, and Gene X-pert MTB/rifampicin assay.

Bovine tuberculosis reactor cattle in Southwest Ethiopia: Risk factors for bovine tuberculosis

Bovine tuberculosis, caused by Mycobacterium bovis, is a chronic zoonotic disease that persists in Ethiopia despite global control efforts, impacting public health and the economy. However, little is known about the epidemiology of bovine tuberculosis in Southwest Ethiopia. This study aims to assess the prevalence of bovine tuberculosis and identify associated risk factors in dairy cattle. A cross-sectional study was conducted from October 2022 to October 2023 in four districts in the Sheka, Bench-Sheko, and Keffa zones. A multistage sampling approach was employed, resulting in the selection of 1,152 cattle from various herds. Tuberculin skin testing was performed to detect bovine tuberculosis, and data on potential risk factors were collected through questionnaires. Logistic regression models were used to analyze the association between bovine tuberculosis and various risk factors. The overall prevalence of bovine tuberculosis was 4.95% at the cow level and 22.19% at the herd level in the study areas. Significant herd-level risk factors for bovine tuberculosis included lowland areas, larger herd sizes, and the introducing new animals. At the cow level, risk factors included age, breed, body condition, herd size, introduction of new animals, and management system. The study reveals a high prevalence of bovine tuberculosis in dairy cattle in Southwest Ethiopia, identifying key risk factors. Effective control requires targeted interventions, such as improved management practices, enhanced farmer awareness, and a better understanding of and guidance on bovine tuberculosis strategies in Ethiopia. Future research should isolate and characterize M. bovis in the study areas.

Latent tubercolosis infection in the migrant population: an Italian surveillance experience

Abstract Background The Special Reception Center (“Centro Accoglienza Straordinario” or CAS in Italian) concept was born in Italy in 2014 to receive the large number of migrants arriving in Italy. There are around 3100 centres are in Italy, of which 200+ in Tuscany. Each Center’s objective is to support migrants’ social integration through Italian language and job orientation courses. On arrival at a facility, migrants undergo diagnostic and lab tests to highlight potentially infectious diseases; among these, tuberculosis is one of the most frequently encountered. Therefore, the objective of the study is to estimate the prevalence of Latent Tuberculosis Infections (LTBIs) among migrants hosted in CAS centers. Methods From May-December 2023, Amiata Senese, Val d’Orcia and Valdichiana Senese Public Health Unit staff, according to national and departmental guidelines, implemented a number of health surveillance protocols, with close attention to latent tuberculosis infection. This protocol includes the Mantoux TB skin test at the CAS: in case of positivity, subjects are directed to further exams (chest X-ray, TB-IGRA blood test, infectious disease specialist consultation) in order to implement a therapy. Results From May-December 2023, 259 migrants (241 males and 18 females) received the TB skin tests. Average subject age was 26. Pakistan was the most represented nation of origin with 130 migrants (50%), followed by Bangladesh (9.7%) and Ivory Coast (7.3%). 77 migrants showed a positive TB skin test result (29.7%): of these 56 (i.e. 21.6% of the migrants screened) were also positive to the TB-IGRA blood test and treated for LTBI. Conclusions The high prevalence of LTBIs found in the referenced CAS indicates the need to continue/extend these surveillance protocols. Implementing successfully this procedure requires the involvement of a range of professionals from the socio-health sector within a process necessarily coordinated by the Disease Prevention Department. Key messages • Screening and surveillance of infectious diseases among migrant population represent a major public health issue for European health systems. • Detection and treatment of Latent Tubercolosis Infections require a multiprofessional and integrated approach, coordinated by the Disease Prevention Department.

Multidisciplinary approach to asylum seekers health assessment: a 5-year experience in Modena, Italy

Abstract Background Asylum seekers’ well-being represents a global health issue. They face significant challenges to their physical and mental health due to their migratory path. In the Modena province (Northern Italy), a multidisciplinary approach has been applied to the care of asylum seekers by Department of Public Health (DPH), with a team of specialists in infectious diseases, dermatology, gynaecology, obstetrics, psychology and preventive medicine. Asylum seekers receive a first visit, including medical and psychological assessment and screening for infectious diseases. Ad hoc pathways are also active for asylum seekers who need secondary-level care. This study aims to investigate the health status of asylum seekers referred to Modena Centre. Methods This cohort study enrolled asylum seekers hosted in Modena between November 2018 and May 2023. During the first visit, personal and anamnestic data were collected aided by cultural mediators, along with clinical assessment. Furthermore, Tuberculin-Skin-Test (TST) and blood tests for HBV-HCV-HIV-Syphilis were performed. Results A total of 646 migrants were included, 94% were males with a median age of 26 years (range: 15-50), the majority from Bangladesh (39%). Females were mostly from Ivory Coast (36%), median age of 30 years (range: 17-45). Most conditions were treated at the primary care level and were related to cutaneous disease (22%), only 11% of subjects required second-level diagnostics. Positive TSTs were 41% (N = 265). Of them, 55.5% (N = 147) also tested positive for QuantiFERON-TB. Screening for infectious diseases revealed positivity rates of 4% for HBsAg, 1% for HCVAb, 0.8% for HIV and 1.4% for TPPA+RPR. Conclusions The multidisciplinary approach is the innovative and strength point of this protocol for asylum seekers’ health ensuring prompt management of pathologies after their arrival. Moreover, data collection is useful for improving intake services and implementing public health programs for vulnerable individuals. Key messages • The innovation of this protocol for asylum seekers’ health lies in its multidisciplinary approach. • Clinical data collection will support health policies’ choices to protect vulnerable individuals.

Sex differences in tuberculosis infection and disease among people with HIV.

Worldwide, adult men experience an excess burden of tuberculosis (TB) disease compared to women, but few studies have examined sex differences in TB among people with HIV. In this study, we aimed to investigate sex differences in TB infection and disease among people with HIV in Rio de Janeiro, Brazil. Analysis of data from a randomized controlled trial and retrospective cohort study. We analyzed data from two studies conducted between 2005 and 2017. The THRio Study (2005-2012) evaluated increasing tuberculin skin testing (TST) and TB preventive therapy (TPT) and UnivART (2010-2017) was a virtual cohort study of people with HIV and TB with data from four national electronic registries. Among 4,606 people with HIV in THRio, 2,992 (65.0%) had a TST placed and read, of whom 312/1,865 (17%) males and 203/1,127 (18%) females (p = 0.37) had prevalent TB infection. TB disease incidence was higher among males compared to females overall (IRR 1.33, 95% CI 1.04-1.69), among males compared to females who did not receive TPT (IRR 1.30, 95% CI 1.01-1.67), and among males compared to females on ART (IRR 1.64, 95% CI 1.17-2.29). Among 54,957 people with HIV in UnivART, TB disease incidence rates were higher among males than females overall (IRR 1.28, 95% CI 1.18-1.39), among males compared to females on ART (IRR 1.58, 95% CI 1.40-1.77), and among males compared to females not on ART (IRR 1.11, 95% CI 0.99-1.25). In this medium TB and HIV burden setting, TB disease incidence was higher among males than females with HIV, despite similar prevalence of TB infection.

Clinical analysis of 20 cases of perinatal tuberculosis

BackgroundTo analyze the clinical manifestations, diagnostic and therapeutic processes of perinatal tuberculosis in children, providing reference for clinicians in the diagnosis and treatment of this disease.MethodsA retrospective analysis was conducted on the epidemiological history, clinical manifestations, laboratory and imaging findings, and treatment follow-up of 20 cases of perinatal tuberculosis diagnosed in the Second Department of Infectious Disease, Kunming Children’s Hospital, from February 2014 to September 2021.ResultsOf the 20 cases, 13 were male (65.0%) and 7 were female (35.0%). The average age at onset was 35.35 ± 23.03days, with an average time from onset to diagnosis of 24.75 ± 15.55days. Tuberculin skin test (TST) was positive in 1 out of 4 cases (25.0%). Gamma interferon release assays (IGRAs) were positive in 9 out of 17 cases (52.9%).acid-fast staining was positive in 7 out of 16 cases (43.7%), and Mycobacterium tuberculosis nucleic acid polymerase-chain-reaction(PCR) was positive in 14 out of 20 cases (70.0%). Chest CT showed miliary changes in 4 out of 19 cases (21.0%), multiple nodular and patchy opacities in 6 out of 19 cases (31.6%), and pulmonary consolidation and atelectasis in 10 out of 19 cases (52.6%). After anti-tuberculosis treatment, 16 out of 20 cases (80.0%) improved, and no recurrence of tuberculosis was observed during follow-up periods ranging from 9 months to 3 years. The growth and development of these children were similar to those of healthy children.ConclusionThe clinical manifestations and chest imaging features of perinatal tuberculosis are nonspecific. In suspected cases, it is crucial to investigate the mother’s condition thoroughly and complete etiological examinations to achieve early diagnosis and timely treatment, which can improve prognosis.

Management implications of latent TB among under-five children at risk: Insights from a community study in Mumbai, India.

Latent tuberculosis infection (LTBI) management is crucial to WHO's End TB Strategy. Indian guidelines recommend treating under-five children with household TB contacts after ruling out active TB, regardless of TBI testing. However, the precise LTBI burden among children in high TB burden settings like India is unknown. A community-based study in Mumbai's urban slums screened and managed under-five children at LTBI risk to understand its epidemiology and inform TB control interventions. Total 369 eligible under-five children were enrolled for the study. LTBI screening was done using Tuberculin skin test and Interferon gamma release assay. Active TB was ruled out before initiation of TB preventive therapy among LTBI positives. Statistical tests like chi-square, logistic regression analysis and Hosmer-Lemeshow test were used. Overall, LTBI prevalence among under-five children was 12.4% by IGRA and 21.4% by TST. Undernourished children had significantly lower LTBI positivity by IGRA (p = 0.027), while those with household contacts, longer contact duration and drug-resistant tuberculosis (DR-TB) exhibited proportionally greater IGRA positivity (p = <0.001). The study found a lower LTBI prevalence among under-five children compared to adults, with key risk factors being HHC, DR-TB contact, and prolonged exposure. These findings suggest the need to revise or revisit the TPT framework for this age group in India, particularly by implementing a test-and-treat approach.

Systematic review of the economic impact of novel Mycobacterium tuberculosis specific antigen-based skin tests for detection of TB infection compared with tuberculin skin test and interferon-gamma release assays.

The Purified Protein Derivative tuberculin skin tests (TST) and blood-based Mycobacterium tuberculosis (M.tb) specific interferon-gamma release assays (IGRA) are the currently used tests for identifying individuals with TB infection for preventive treatment. However, challenges around access and implementation have limited their use. Novel M.tb specific skin tests (TBST) such as Diaskintest, ESAT6-CFP10 (C-TST), C-Tb (also known as Cy-Tb), and DPPD may provide accurate and scalable options but evidence synthesis on their economic impact is lacking. We conducted two separate systematic reviews to compare the costs and cost-effectiveness of (1) the novel skin tests TBST (primary), and (2) TST and IGRA tests (secondary), to support WHO guideline development. We searched for articles presenting economic evaluations of the diagnostic tests using a health provider perspective and related to TB infection in humans. We considered papers written in English, Chinese or Russian. In the primary review, eight studies for novel TBST were found. One study in Brazil assessed cost-effectiveness of C-TST and Diaskintest and seven in Russia assessed the Diaskintest, while none evaluated C-Tb or DPPD. The review showed on average, Diaskintest kit costs (in 2021 USD) $1.60 (1.50 - 1.70), while full unit costs were estimated at $5.07. C-TST unit cost was $9.96. The second review found 32 articles on IGRA and/or the TST. These presented an average TST full unit cost of $37.88, and $87.81 for IGRA. Studies' quality for TBST was limited while high-quality studies were found for TST and IGRA tests. In conclusion, there is limited evidence regarding the costs and cost-effectiveness of novel TBST. Conversely, there is substantial evidence for TST and IGRA tests, but most studies were performed in high-income and low-TB burden settings and their cost-effectiveness varied between and within risk groups without clear economic consensus.

Study of Co-relation between Clinical and Diagnostic Profile of Pediatric Tuberculosis in a Tertiary Care Hospital

Objective: Study of Co-relation between Clinical and Diagnostic profile of Pediatric Tuberculosis in a tertiary care hospital. Methods: This hospital-based observational study was conducted at the Department of Pediatrics, Muzaffarnagar Medical College and Hospital, covering a population of children aged &lt;18 years diagnosed with TB. Data collection spanned 18 months, with a sample size of 100 children. Results: The study identified a predominant TB incidence in children aged 11-17 years (73%) with more females affected (66%) than males. Common symptoms included fever, cough, weight loss, and loss of appetite. Diagnostic findings showed a high use of Chest X-rays and Molecular tests. PTB was the most common form, accounting for 47 cases, EPTB accounting for 48 cases and Disseminated form was seen in 5 cases. Conclusions: Chest X-ray, Tuberculin Skin Test, Molecular Tests, and Blood Tests were universally performed on all patients. Microbiological confirmation is more common in pulmonary tuberculosis cases, while radiology, FNAC/Biopsy, and body fluid analysis are more utilized for extrapulmonary/disseminated cases. Diagnosing tuberculosis (TB) in children is often challenging due to several factors, including the difficulty in obtaining specimens and the typical paucibacillary nature.

Macular Star and Neuroretinitis with Optic Disk Edema

Neuroretinitis is an inflammatory disorder of the eye presenting with unilateral visual loss, optic disc edema, and subsequent formation of a macular star. Neuroretinitis can be classified as idiopathic, infectious and recurrent. Following a detailed patient history, essential work-up should include Bartonella antibody titers, the rapid plasma reagin (RPR) test, the tuberculin skin test, ACE and lysozyme levels, and a two-view chest X-ray. Among infectious etiologies of neuroretinitis, cat scratch disease caused by Bartonella henselae is the most frequently observed, accounting for two-thirds of cases. Recurrent neuroretinitis is characterized by poorer visual recovery and visual field loss. Patients should be informed about the possibility of recurrence to prevent severe vision loss.

Spectrum of Ocular Tuberculosis in Tertiary Care Hospitals of Khyber Pakhtunkhwa Peshawar

Purpose: To describe the spectrum of ocular tuberculosis (TB), highlight the difficulty in diagnosis and treatment of such cases encountered in a tertiary care hospital of Peshawar, Pakistan. Study Design: Descriptive Case series. Place and Duration of Study: Khyber teaching hospital MTI Peshawar from Jan 2021 till July 2022. Methods: Eleven cases with Ocular tuberculosis are described. At presentation, complete history was taken and detailed examination was done including fundus examination and OCT macula. For diagnosis, a combination of Tuberculin skin test (TST) and Quantiferon-Gold was performed. On the basis of results of both tests Anti-TB treatment (ATT) was started and continued for an average of 9 months. Results: This study highlights the diverse ocular manifestations of TB in patients, even without a known history of systemic disease. Among 11 patients, 3 presented with panuveitis, 6 with posterior uveitis, and 2 with serpiginous-like choroidopathy with uveitis. Notably, only 2 had a known history of systemic TB. The patients were treated primarily with Anti-Tuberculosis Therapy (ATT) along with steroids or other adjunct therapies. Most cases showed improved vision and stable disease post-treatment, with visual acuity ranging from 6/24 to 6/6. However, two patients were lost to follow-up, leaving their outcomes unknown. Conclusion: In this case series, we explore different cases of Ocular Tuberculosis (OTB) seen at a busy hospital in Peshawar, Pakistan. There are variety of symptoms with which the patients present. The combined use of TST and Quantiferon-Gold proved an effective and affordable approach for diagnosis and timely initiation of ATT in ocular TB.

Magnitude and Determinants of Latent Tuberculosis Among Inmates of Saudi Correctional Facilities: A Cross-Sectional Study.

To estimate the prevalence and determinants of latent tuberculosis (LTBI) among inmates of four correctional facilities in Saudi Arabia. This is a retrospective review of health records. All inmates of four correctional facilities in Saudi Arabia were screened for tuberculosis in 2022. Their LTBI status was defined as more than 10mm Mantoux test result and negative X-ray chest result. The prevalence of LTBI and their determinants like age, gender, country of origin, location of the prison, and human immunodeficiency viruses (HIV) status were studied. We reviewed screening data of 10,042 inmates in four Saudi prisons. The prevalence of LTBI was 7.4%. The risk difference of LTBI was significantly higher in males compared to female inmates (P < 0.001). The highest prevalence of LTBI was noticed among males (7.7%), those older than 60 years old (26.9%), and African expatriates (12.1%). None of the female inmates or those with HIV had LTBI.The binomial regression analysis revealed a highly significant effect of older age on the risk of having LTBI. The prevalence of LTBI was low among inmates at Saudi correctional facilities. The males, old age, and persons from African and Asian countries had a higher risk of LTBI. The prevalence of LTBI among inmates of Saudi prisons could be predicted by knowing their age group.

Role of mothers in preventing tuberculosis in children: A scoping review

Tuberculosis (TB) remains a significant global health challenge, especially for children. The aim of this scoping review was to investigate the role of mothers in preventing childhood TB transmission and highlight effective strategies and associated barriers. A systematic literature search was conducted using PubMed, Web of Science, and Scopus, covering articles up to January 17, 2024. The search included keywords like “mother,” “parents,” “care,” “prevention,” and “tuberculosis.” Eligibility criteria included peer-reviewed articles on maternal health interventions for TB prevention in children and published in English. The study selection process involved screening titles and abstracts, followed by full-text reviews by Rayyan Artificial Intelligence (AI). Eighteen studies were analyzed, revealing the crucial roles of mothers and healthcare workers in TB prevention. The results indicated that in South Africa, only 47% of eligible pregnant women underwent Mantoux testing, with lower rates in rural areas. The isoniazid preventive therapy (IPT) uptake rate was 79%, with geographical variations. Barriers included insufficient patient information, inadequate screening facilities, and healthcare providers' knowledge gaps. Parental involvement, particularly by mothers, is vital for adherence to TB preventive measures. Challenges in integrating TB case-finding with antenatal care and prevention of mother-to-child transmission (PMTCT) services included inconsistent screening and healthcare worker shortages. Enhancing health services, reducing stigma, and integrating TB prevention into existing programs are essential. In conclusion, this review underscores that effective childhood TB prevention requires a coordinated approach that incorporates the efforts of the mother and healthcare worker. Addressing barriers such as contact tracing gaps and diagnostic delays, alongside enhancing maternal health education and support, is essential for improving TB prevention and management. Targeted interventions and collaborative efforts are needed to reduce transmission and improve health outcomes, particularly in bridging rural-urban disparities.