Signs and symptoms of human T-lymphotropic virus 1 and 2 infections in paediatric patients

Area of Science:

• Pediatrics
• Infectious Diseases
• Neurology

Background:

• Human T-lymphotropic virus type 1 (HTLV-1) is a significant human retrovirus with potential for vertical transmission.
• While HTLV-1 is known to cause various conditions, its prevalence and specific manifestations in pediatric populations require further elucidation.
• Limited data exists on HTLV-2 in children, necessitating a focus on HTLV-1 in pediatric research.

Purpose of the Study:

• To determine the prevalence of signs and symptoms associated with HTLV-1 infection in pediatric patients.
• To identify common clinical manifestations and early indicators of HTLV-1 in children.
• To inform clinical practice regarding HTLV-1 screening in at-risk pediatric populations.

Main Methods:

• A systematic review of observational studies (cohort, case-control, descriptive) was conducted.
• Searches included major databases (MEDLINE, EMBASE, LILACS) and other literature sources.
• Qualitative analysis was performed on eight included studies; meta-analysis was not conducted due to heterogeneity.

Main Results:

• Eight studies met inclusion criteria; no studies specifically addressed HTLV-2 in children.
• Vertical transmission was observed in nearly all cases, with a predominance of females.
• Common manifestations included infective dermatitis and early neurological signs such as persistent hyperreflexia, clonus, and Babinski sign.

Conclusions:

• HTLV-1 infection in children is primarily vertically transmitted and associated with specific clinical signs.
• Infective dermatitis and early neurological alterations are key indicators of HTLV-1 in pediatric patients.
• Screening for HTLV-1 is recommended for children with these symptoms, particularly those from endemic regions or with walking disturbances.