Trends of measles in Tanzania : A 5-year review of case-based surveillance data, 2018-2022
Copyright © 2023 The Author(s). Published by Elsevier Ltd.. All rights reserved..
OBJECTIVES: Tanzania observed a gradual increase in the number of measles cases since 2019 with a large outbreak recorded during 2022. This study describes the trend of measles in Tanzania over a 5-year period from 2018-2022.
METHODS: This was a descriptive study conducted using routine measles case-based surveillance system including 195 councils of the United Republic of Tanzania.
RESULTS: Between 2018 and 2022 there were 12,253 measles cases reported. Out of 10,691 (87.25%) samples tested by enzyme-linked immunosorbent assay, 903 (8.4%) were measles immunoglobulin M positive. The highest number of laboratory-confirmed measles cases was in 2022 (64.8%), followed by 2020 (13.8%), and 2019 (13.5%). Out of 1279 unvaccinated cases, 213 (16.7%) were laboratory-confirmed measles cases compared to 77/723 (10.6%) who were partially vaccinated and 71/1121 (6.3%) who were fully vaccinated (P < 0.001). Children aged between 1-4 years constituted the most confirmed measles cases after laboratory testing, followed by those aged 5-9 years. There was a notable increase in the number of laboratory-confirmed measles cases in children <1 year and 10-14 years during 2022 compared to previous years. The vaccination coverage of the first dose of measles-containing vaccine (MCV1) was maintained >90% since 2013 while MCV2 increased gradually reaching 88% in 2022.
CONCLUSIONS: Accumulation of susceptible children to measles due to suboptimal measles vaccination coverage over the years has resulted in an increase in the number of laboratory-confirmed measles cases in Tanzania with more cases recorded during the COVID-19 pandemic. Strengthening surveillance, routine immunization, and targeted strategies are key to achieving the immunity levels required to interrupt measles outbreaks.
| Medienart: |
E-Artikel |
|---|
| Erscheinungsjahr: |
2024 |
|---|---|
| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:139 |
|---|---|
| Enthalten in: |
International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases - 139(2024) vom: 15. Feb., Seite 176-182 |
| Sprache: |
Englisch |
|---|
| Beteiligte Personen: |
Michael, Fausta [VerfasserIn] |
|---|
| Links: |
|---|
| Themen: |
|---|
| Anmerkungen: |
Date Completed 15.01.2024 Date Revised 10.02.2024 published: Print-Electronic Citation Status MEDLINE |
|---|
| doi: |
10.1016/j.ijid.2023.12.007 |
|---|
| funding: |
|
|---|---|
| Förderinstitution / Projekttitel: |
|
| PPN (Katalog-ID): |
NLM366136321 |
|---|
| LEADER | 01000caa a22002652 4500 | ||
|---|---|---|---|
| 001 | NLM366136321 | ||
| 003 | DE-627 | ||
| 005 | 20240210233008.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 231227s2024 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1016/j.ijid.2023.12.007 |2 doi | |
| 028 | 5 | 2 | |a pubmed24n1287.xml |
| 035 | |a (DE-627)NLM366136321 | ||
| 035 | |a (NLM)38122965 | ||
| 035 | |a (PII)S1201-9712(23)00809-3 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 100 | 1 | |a Michael, Fausta |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Trends of measles in Tanzania |b A 5-year review of case-based surveillance data, 2018-2022 |
| 264 | 1 | |c 2024 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ƒaComputermedien |b c |2 rdamedia | ||
| 338 | |a ƒa Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Date Completed 15.01.2024 | ||
| 500 | |a Date Revised 10.02.2024 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2023 The Author(s). Published by Elsevier Ltd.. All rights reserved. | ||
| 520 | |a OBJECTIVES: Tanzania observed a gradual increase in the number of measles cases since 2019 with a large outbreak recorded during 2022. This study describes the trend of measles in Tanzania over a 5-year period from 2018-2022 | ||
| 520 | |a METHODS: This was a descriptive study conducted using routine measles case-based surveillance system including 195 councils of the United Republic of Tanzania | ||
| 520 | |a RESULTS: Between 2018 and 2022 there were 12,253 measles cases reported. Out of 10,691 (87.25%) samples tested by enzyme-linked immunosorbent assay, 903 (8.4%) were measles immunoglobulin M positive. The highest number of laboratory-confirmed measles cases was in 2022 (64.8%), followed by 2020 (13.8%), and 2019 (13.5%). Out of 1279 unvaccinated cases, 213 (16.7%) were laboratory-confirmed measles cases compared to 77/723 (10.6%) who were partially vaccinated and 71/1121 (6.3%) who were fully vaccinated (P < 0.001). Children aged between 1-4 years constituted the most confirmed measles cases after laboratory testing, followed by those aged 5-9 years. There was a notable increase in the number of laboratory-confirmed measles cases in children <1 year and 10-14 years during 2022 compared to previous years. The vaccination coverage of the first dose of measles-containing vaccine (MCV1) was maintained >90% since 2013 while MCV2 increased gradually reaching 88% in 2022 | ||
| 520 | |a CONCLUSIONS: Accumulation of susceptible children to measles due to suboptimal measles vaccination coverage over the years has resulted in an increase in the number of laboratory-confirmed measles cases in Tanzania with more cases recorded during the COVID-19 pandemic. Strengthening surveillance, routine immunization, and targeted strategies are key to achieving the immunity levels required to interrupt measles outbreaks | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Measles | |
| 650 | 4 | |a Outbreaks | |
| 650 | 4 | |a Tanzania | |
| 650 | 7 | |a Measles Vaccine |2 NLM | |
| 700 | 1 | |a Mirambo, Mariam M |e verfasserin |4 aut | |
| 700 | 1 | |a Misinzo, Gerald |e verfasserin |4 aut | |
| 700 | 1 | |a Minzi, Omary |e verfasserin |4 aut | |
| 700 | 1 | |a Beyanga, Medard |e verfasserin |4 aut | |
| 700 | 1 | |a Mujuni, Delphinus |e verfasserin |4 aut | |
| 700 | 1 | |a Kalabamu, Florence S |e verfasserin |4 aut | |
| 700 | 1 | |a Nyanda, Elias N |e verfasserin |4 aut | |
| 700 | 1 | |a Mwanyika-Sando, Mary |e verfasserin |4 aut | |
| 700 | 1 | |a Ndiyo, Daniel |e verfasserin |4 aut | |
| 700 | 1 | |a Kasonogo, Richard |e verfasserin |4 aut | |
| 700 | 1 | |a Ismail, Abbas |e verfasserin |4 aut | |
| 700 | 1 | |a Bahati, Andrew |e verfasserin |4 aut | |
| 700 | 1 | |a Hassan, Farida |e verfasserin |4 aut | |
| 700 | 1 | |a Kaale, Eliangiringa |e verfasserin |4 aut | |
| 700 | 1 | |a Chai, John J |e verfasserin |4 aut | |
| 700 | 1 | |a Kinyunyi, Pricillah |e verfasserin |4 aut | |
| 700 | 1 | |a Kyesi, Furaha |e verfasserin |4 aut | |
| 700 | 1 | |a Tinuga, Florian |e verfasserin |4 aut | |
| 700 | 1 | |a Mongi, Dhamira |e verfasserin |4 aut | |
| 700 | 1 | |a Salehe, Abdul |e verfasserin |4 aut | |
| 700 | 1 | |a Muhindi, Bonaventura |e verfasserin |4 aut | |
| 700 | 1 | |a Mdachi, Joseph |e verfasserin |4 aut | |
| 700 | 1 | |a Magodi, Richard |e verfasserin |4 aut | |
| 700 | 1 | |a Mwenesi, Mwendwa |e verfasserin |4 aut | |
| 700 | 1 | |a Nyaki, Honest |e verfasserin |4 aut | |
| 700 | 1 | |a Katembo, Betina |e verfasserin |4 aut | |
| 700 | 1 | |a Tenga, Kelvin |e verfasserin |4 aut | |
| 700 | 1 | |a Kasya, Magdalena |e verfasserin |4 aut | |
| 700 | 1 | |a Mwengee, Willliam |e verfasserin |4 aut | |
| 700 | 1 | |a Mshana, Stephen E |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases |d 1998 |g 139(2024) vom: 15. Feb., Seite 176-182 |w (DE-627)NLM094730857 |x 1878-3511 |7 nnns |
| 773 | 1 | 8 | |g volume:139 |g year:2024 |g day:15 |g month:02 |g pages:176-182 |
| 856 | 4 | 0 | |u http://dx.doi.org/10.1016/j.ijid.2023.12.007 |3 Volltext |
| 912 | |a GBV_USEFLAG_A | ||
| 912 | |a GBV_NLM | ||
| 951 | |a AR | ||
| 952 | |d 139 |j 2024 |b 15 |c 02 |h 176-182 | ||