Preliminary investigation and intervention of the suspected plague outbreak in Madunga, Babati District-Tanzania.

Autor: Mwalimu CD; Ministry of Health, Community Development, Gender, Elderly and Children, Dodoma, Tanzania; Tanzania Field Epidemiology and Laboratory Training Program (TFELTP), Dar es Salaam, Tanzania. Electronic address: dismasi@yahoo.com., Mgode G; Pest Management Centre, Sokoine University of Agriculture, Morogoro, Tanzania., Sabuni C; Pest Management Centre, Sokoine University of Agriculture, Morogoro, Tanzania., Msigwa F; National Health Laboratory, Dar es Salaam, Tanzania., Mghamba J; Ministry of Health, Community Development, Gender, Elderly and Children, Dodoma, Tanzania; Tanzania Field Epidemiology and Laboratory Training Program (TFELTP), Dar es Salaam, Tanzania., Nyanga A; Tanzania Field Epidemiology and Laboratory Training Program (TFELTP), Dar es Salaam, Tanzania., Mohamed A; Tanzania Field Epidemiology and Laboratory Training Program (TFELTP), Dar es Salaam, Tanzania., Kwesi E; Tanzania Field Epidemiology and Laboratory Training Program (TFELTP), Dar es Salaam, Tanzania., Nagu N; Ministry of Health, Community Development, Gender, Elderly and Children, Dodoma, Tanzania., Kishimba R; Ministry of Health, Community Development, Gender, Elderly and Children, Dodoma, Tanzania; Tanzania Field Epidemiology and Laboratory Training Program (TFELTP), Dar es Salaam, Tanzania., John L; Ministry of Health, Community Development, Gender, Elderly and Children, Dodoma, Tanzania; Tanzania Field Epidemiology and Laboratory Training Program (TFELTP), Dar es Salaam, Tanzania., Manoza S; Regional Health Management Team, Manyara, Tanzania., Boay M; Council Health Management Team, Babati District Council, Manyara, Tanzania., Mleli J; Council Health Management Team, Babati District Council, Manyara, Tanzania., Lutambi J; Council Health Management Team, Babati District Council, Manyara, Tanzania., Mwingira VS; National Institute for Medical Research, Amani Research Centre, P.O. Box 81, Muheza, Tanzania., Subi L; Ministry of Health, Community Development, Gender, Elderly and Children, Dodoma, Tanzania., Kweka EJ; Department of Medical Parasitology and Entomology, School of Medicine, Catholic University of Health Sciences, P.O. Box 1464, Mwanza, Tanzania; Tropical Pesticides Research Institute, Division of Livestock and Human Disease Vector Control, Mosquito Section, P.O. Box 3024, Arusha, Tanzania. Electronic address: pat.kweka@gmail.com., Kilonzo B; Pest Management Centre, Sokoine University of Agriculture, Morogoro, Tanzania.
Jazyk: angličtina
Zdroj: Acta tropica [Acta Trop] 2022 Sep; Vol. 233, pp. 106566. Date of Electronic Publication: 2022 Jun 17.
DOI: 10.1016/j.actatropica.2022.106566
Abstrakt: Background: Rodents are known to be reservoirs of plague bacteria, Yesinia pestis in the sylvatic cycle. A preliminary investigation of the suspected plague outbreak was conducted in Madunga Ward, Babati District Council in Manyara Region December-2019-January 2020 Following reported two cases which were clinically suspected as showing plague disease symptoms.
Method: The commensal and field rodents were live trapped using Sherman traps in Madunga Ward, where plague suspect cases were reported and, in the Nou-forest reserve areas at Madunga Ward, Babati District Council, to assess plague risk in the area. Fleas were collected inside the houses using light traps and on the rodents 'body after anaesthetizing the captured rodent to determine flea indices which are used to estimate the risk of plague transmission. Lung impression smears were made from sacrificed rodents to examine for possible bipolar stained Yersinia spp bacilli.
Results: A total of 86 rodents consisting of ten rodent species were captured and identified from the study sites. Nine forest rodent species were collected. Field/fallow rodent species were dominated by Mastomys natalensis. whereas domestic rodent species captured was Rattus rattus. Overall lung impression smear showed bipolar stain were 14 (16.28%) while House Flea Index (HFI) was 3.1 and Rodent Flea Index (RFI) was 1.8.
Conclusion: The findings of this study have shown that, the presence of bipolar stained bacilli in lung impression smears of captured species of rodents indicates (not confirmed) possible circulation of Yesrsinia pests in rodents and the high flea indices in the area which included the most common flea species known to be plague vectors in Tanzania could have played transmission role in this suspected outbreak. The study recommends surveillance follow-up in the area and subject collected samples to the standard plague confirmatory diagnosis.
(Copyright © 2022. Published by Elsevier B.V.)
Databáze: MEDLINE
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