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HIV & AIDS Review. International Journal of HIV-Related Problems
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4/2020
vol. 19
 
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Original paper

Oral manifestations in pediatric HIV infection in developing countries based on published research between 2009-2019

Mario P. Mensana
1
,
Alexander P. Nugraha
1
,
Diah S. Ernawati
2

1.
Faculty of Dental Medicine, Universitas Airlangga, Surabaya, East Java, Indonesia
2.
Department of Oral Medicine, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, East Java, Indonesia
HIV AIDS Rev 2020; 19, 4: 222-226
Online publish date: 2020/12/12
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Introduction

Human immunodeficiency virus (HIV) is a retrovirus that causes progressive host immune system failure and over time, allows life-threatening opportunistic infections and cancer to develop, a condition called acquired immunodeficiency syndrome (AIDS) [1, 2]. Globally, HIV infection has become a major health issue, affecting approximately 36.9 million people worldwide and of these, 18.2 million are women of reproductive age and 1.8 million are children under 15 years of age [3]. A significant majority reside in developing countries [4]. Despite the slogan “One World, One Hope”, which has been declared in 1996 as a symbol of global commitment to fight against HIV/AIDS, the tragedy of the HIV epidemic continue to expand in the developing countries, due to a combination of factors including, among others, poor socioeconomic conditions and limited access to health facilities [4]. Many developing countries, such as Indonesia, do not screen for HIV as a part of its routine antenatal care [5]. Consequently, the transmission of HIV to children, which mostly occurs through vertical transmission from infected mothers through pregnancy, labor, and breastfeeding, becomes more prevalent. HIV infection in children worsens at a more progressive rate due to their immature immune system. As an infant relies on the maternal immune system during the early days of life, disturbance in a mother’s immune system due to HIV infection also negatively affects the immunity of newborn [6]. Within one year, an estimated 26% postnatally and 52% perinatally HIV- infected infants die due to complications of the infection [7]. With the declining immunity, a higher frequency of pathogenic microorganisms and normal flora infections may occur, manifesting in the oral cavity. HIV-infected children have a higher prevalence of oral soft tissue lesions compared to the general pediatric population, which varies according to the progression of the disease [8]. The objective of this literature search was to review recent findings on oral manifestations prevalent in pediatric HIV patients confined to developing countries.

Material and methods

A literature search was done in accordance with the Preferred Reporting Items for Systematic Reviews and Meta Analyses (PRISMA) in PubMed databases, using the keywords: “HIV”, “children”, and “oral manifestation”. Included papers were restricted to an observational cross-sectional research, providing data on HIV-infected children living in developing countries published within the last 10 years (2009-2019), which assessed the presence of intraoral soft tissue lesions (Figure 1). Data were gathered and tabulated, followed by the calculation of weighted average prevalence of each lesion.

Results

A total of 186 articles related to “HIV”, “children”, and “oral manifestation” keywords were reviewed, yet only 12 articles were selected based on the location and design of the study, inclusion criteria, methodology used, parameters studied, and data presentation. The majority of studies were conducted in India (5 articles) (Table 1). Candidiasis was the most common oral manifestations found in HIV-positive children, followed by angular cheilitis, ulcer, and hyperpigmentation, with a mean prevalence of 44.2%, 27.2%, 11.1%, and 6.5% respectively (Table 2).

Discussion

Between 2009-2019, research on oral manifestations in children with HIV/AIDS living in developing countries are limited, despite its importance in early diagnosis and in monitoring the progression of the infection to AIDS. Although labo­ratory tests, such as CD4+ lymphocyte count and HIV viral load, are the most accurate markers in determining the course of the infection, these tests are not applicable in many resource-limited settings in developing countries. Inspecting oral lesions, which are present in 70-90% of HIV- infected individuals during different stages of the disease, is therefore the simplest, most cost-effective, and non-invasive procedure to perform by clinicians [22]. Since 1993, various oral conditions associated with HIV/AIDS in children have been described by EC-Clearinghouse. These conditions observed in children are different to adults. HIV-positive children most commonly present with oral candidiasis, which includes angular cheilitis, herpes simplex virus (HSV) infection, linear gingival erythema (LGE), parotid enlargement, and recurrent aphthous ulcers [23]. Findings from the 12-research reviewed in this paper are consistent with the EC-Clearinghouse classification, as candidiasis (44.2%), angular cheilitis (27.2%), and ulcers (11.1%) were still the most common manifestations observed. Oral candidiasis was consistently observed in all 12 research, and angular cheilitis and ulcers were reported in most of the reviewed research, being identified in 9 and 10 research, respectively. As the EC-Clearinghouse classification was made before the advent of antiretroviral therapy (ART), hyperpigmentation of oral mucosa was not considered common in children. Zidovudine (AZT), one of ARTs commonly provided to HIV-positive children, has been reported to cause oral brownish pigmentation [24]. AZT or its metabolites is assumed to increase melanin production or being accumulated in the mucosa forming complexes with melanin or iron [25]. With the increasing number of children receiving AZT, hyperpigmentation is expected to be more prevalent. According to the EC-Clearinghouse classification, LGE and HSV infection are also common findings in children with HIV infection. In this review, LGE and HSV were reported in 8 and 6 out of 12 research, respectively, yet with lower prevalence.
Oral hairy leukoplakia (OHL), Kaposi’s sarcoma, and necrotizing ulcerative gingivitis (NUG) are more common in adult than in children. However, these lesions can also be observed in children, as being identified in 5, 2, and 1 research, respectively. The presence of these lesions is pathognomonic of HIV infection and commonly indicates moderate or severe progression of the disease; therefore, an appropriate follow-up is essential [23]. It is the limitation of this study to determine the presence of oral manifestation based on ARV therapy and degree of immune suppression (CD4 cell count), as not all included studies presented complete demographic characteristics of the study population. Furthermore, all studies employed a one-time oral examination without subsequent follow-up assessment. Therefore, the criteria for children on ART and non-ART excluded the period of therapy, except a study of Baghirath et al., who recorded lower oral manifestations in children on long-term ART therapy (≥ 3 years) compared to short-term treatment (< 3 years) [13]. Longitudinal studies with regular screenings for oral lesions need to be conducted in order to accurately assess the efficacy of ART in suppressing oral manifestations.
In general, the studies included in this review consistently revealed a lesser number of children on ART presenting with oral lesions, except for oral pigmentation, which becomes more prevalent. Further studies need to focus on comparing oral manifestations in HIV-positive children in developing and developed countries.

Conclusions

Studies on oral manifestation in HIV-positive children are very limited, despite an extremely high-rate of infection in developing countries. Candidiasis remains to be the most common opportunistic infection found in HIV-positive children.

Conflict of interest

The authors declare no conflict of interest with respect to the research, authorship, and/or publication of this article.
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