ABSTRACT
BACKGROUND: Brucellosis, a zoonosis mainly transmitted by consumption of unpasteurized dairy products as well as direct contact with infected animals, is endemic in Kyrgyzstan. However, Brucella species in humans have not been investigated and the origin of the disease remains poorly known in wide parts of Сentral Asia. Thus, molecular characterization of the circulating strains is a critical first step in understanding Brucella diversity in the country. METHODS: In this study, isolates were collected from patients with suspected brucellosis from different regions in Kyrgyzstan between 2019 and 2020. The detection and identification of Brucella was carried out by Bruce-ladder PCR. Next generation sequencing was used to sequence the 89 Brucella isolates, which were genotyped by cgSNP and cgMLST to identify epidemiological connection between Brucella isolates as well as placing them in the context of the global Brucella phylogeny. RESULTS: The Brucella strains isolated from all regions of Kyrgyzstan were identified as B. melitensis. Based on cgSNP analysis, 18 sequence types were differentiated. The highest numbers of different sequence types were found in Batken (n = 8), Osh (n = 8) and Jalal-Abad (n = 6) oblasts. According to cgSNP and cgMLST analyses, different B. melitensis lineages circulate in Kyrgyzstan, all of them belonging to the Eastern Mediterranean group of the global Brucella phylogeny with the highest similarity to strains from Turkmenistan, Iran and Turkey. CONCLUSION: In the present study, B. melitensis was identified as a causative agent of human brucellosis in Kyrgyzstan and different lineages could be identified. Since this study focused on isolates of human origin, the identity of Brucella species and lineages circulating among animal populations remains elusive. Implementing culture techniques and use of most recent molecular, bioinformatic and epidemiological tools are needed to set up a One Health approach to combat brucellosis in Kyrgyzstan. Further, other Сentral Asian countries need to take part in this effort as brucellosis is a transboundary disease in these regions.
Subject(s)
Brucella melitensis , Humans , Brucella melitensis/genetics , Kyrgyzstan/epidemiology , Asia , Computational Biology , IranABSTRACT
Brucellosis is a globally reemerging and neglected zoonosis causing serious public health problems as well as considerable economic losses due to infection of livestock. Although the epidemiology of brucellosis has been well studied and its various aspects in humans and animals are well understood, it is still one of the most challenging health problems in many developing countries such as Kyrgyzstan. This review describes epidemiological characteristics of brucellosis in humans and animals, its impact on animal production and the role of implemented infection control measures in Kyrgyzstan. Particularly, introduction of mass vaccination in small ruminants evidently contributed to control of brucellosis in Kyrgyzstan, reducing the number of infections in animals as well as humans.
ABSTRACT
This case study is based on an outbreak investigation conducted by multisectoral team from animal and public health offices in Kaktong (a remote village in Zhemgang District Bhutan) during July-September 2010. This outbreak caused by ingestion of infected cow meat which had died after a brief illness (bleeding of unclotted blood from nostrils). The owner of the affected cow had opened the carcass and dressed the meat, which he shared or sold within the village for human consumption. It simulates an epidemiological investigation including active and passive case finding, descriptive and analytical epidemiology, laboratory confirmation, risk communication with implementation of control measures. This case study is designed for the training of front-line public health professional, basic, intermediate and advanced level field epidemiology trainees. The case study will build the capacity of the trainees regarding investigating illnesses caused by animal-human interface.
