Clinical pneumonia in the hospitalised child in Malawi in the post-pneumococcal conjugate vaccine era: a prospective hospital-based observational study.

Iroh Tam, Pui-Ying ORCID: https://orcid.org/0000-0002-3682-8892, Chirombo, James, Henrion, Marc, Newberry, Laura, Mambule, Ivan, Everett, Dean, Mwansambo, Charles, Cunliffe, Nigel, French, Neil, Heyderman, Robert S and Bar-Zeev, Naor (2022) 'Clinical pneumonia in the hospitalised child in Malawi in the post-pneumococcal conjugate vaccine era: a prospective hospital-based observational study.'. BMJ Open, Vol 12, Issue 2, e050188.

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Abstract

OBJECTIVE

Assess characteristics of clinical pneumonia after introduction of pneumococcal conjugate vaccine (PCV), by HIV exposure status, in children hospitalised in a governmental hospital in Malawi.

METHODS AND FINDINGS

We evaluated 1139 children ≤5 years old hospitalised with clinical pneumonia: 101 HIV-exposed, uninfected (HEU) and 1038 HIV-unexposed, uninfected (HUU). Median age was 11 months (IQR 6-20), 59% were male, median mid-upper arm circumference (MUAC) was 14 cm (IQR 13-15) and mean weight-for-height z score was -0.7 (±2.5). The highest Respiratory Index of Severity in Children (RISC) scores were allocated to 10.4% of the overall cohort. Only 45.7% had fever, and 37.2% had at least one danger sign at presentation. The most common clinical features were crackles (54.7%), nasal flaring (53.5%) and lower chest wall indrawing (53.2%). Compared with HUU, HEU children were significantly younger (9 months vs 11 months), with lower mean birth weight (2.8 kg vs 3.0 kg) and MUAC (13.6 cm vs 14.0 cm), had higher prevalence of vomiting (32.7% vs 22.0%), tachypnoea (68.4% vs 49.8%) and highest RISC scores (20.0% vs 9.4%). Five children died (0.4%). However, clinical outcomes were similar for both groups.

CONCLUSIONS

In this post-PCV setting where prevalence of HIV and malnutrition is high, children hospitalised fulfilling the WHO Integrated Management of Childhood Illness criteria for clinical pneumonia present with heterogeneous features. These vary by HIV exposure status but this does not influence either the frequency of danger signs or mortality. The poor performance of available severity scores in this population and the absence of more specific diagnostics hinder appropriate antimicrobial stewardship and the rational application of other interventions.

Item Type:	Article
Subjects:	QW Microbiology and Immunology > Immunotherapy and Hypersensitivity > QW 806 Vaccination WA Public Health > WA 30 Socioeconomic factors in public health (General) WC Communicable Diseases > Infection. Bacterial Infections > Bacterial Infections > WC 202 Pneumonia (General or not elsewhere classified) WS Pediatrics > WS 20 Research (General)
Faculty: Department:	Clinical Sciences & International Health > Clinical Sciences Department
Digital Object Identifer (DOI):	https://doi.org/10.1136/bmjopen-2021-050188
Depositing User:	Julie Franco
Date Deposited:	24 Feb 2022 14:38
Last Modified:	24 Feb 2022 14:38
URI:	https://archive.lstmed.ac.uk/id/eprint/19968

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