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ORIGINAL ARTICLE
Year : 2021  |  Volume : 153  |  Issue : 3  |  Page : 320-326

Journey towards National Institute of One Health in India


1 Centre for Zoonoses, Nagpur Veterinary College, Maharashtra Animal & Fishery Science University, Nagpur, Maharashtra, India
2 Department of Microbiology, Mahatma Gandhi Institute of Medical Sciences, Sevagram, Maharashtra, India
3 Research Centre, Central India Institute of Medical Sciences, Nagpur, Maharashtra, India
4 Division of Epidemiology and Communicable Diseases, Indian Council of Medical Research, New Delhi, India
5 ICAR-National Research Centre on Meat, Hyderabad, Telangana, India

Date of Submission03-Mar-2021
Date of Web Publication23-Apr-2021

Correspondence Address:
Dr. Sandeep P Chaudhari
Department of Veterinary Public Health, Nagpur Veterinary College, Seminary Hills, Nagpur 440 006, Maharashtra
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijmr.IJMR_636_21

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   Abstract 

Background & objectives: Issues such as emerging and re-emerging infectious diseases, antimicrobial resistance, food security, biosafety and biosecurity are associated with changes in land use, population growth, urbanization, global travel and trade and climate change. As a result, a trans-disciplinary approach among human, animal and environmental health disciplines gained support. The Indian Council of Medical Research (ICMR) and Indian Council of Agricultural Research (ICAR) decided to establish a National Institute of One Health at Nagpur, Maharashtra, India. In this context, two collaborative research projects, funded by the ICAR and ICMR were initiated to conduct the epidemiological surveillance of selected zoonotic diseases in Central India.
Methods: Disease surveillance and molecular detection employing standard techniques like enzyme linked immunosorbent assay (ELISA), immuno-fluroscent assay (IFA), standard tube agglutination test (STAT) , Rose Bengal plate test (RBPT) and polymerase chain reaction (PCR) were undertaken based on the disease to be screened.
Results: In animals, the seropositivities for listeriosis (7.66%) and brucellosis (11.69%) were recorded. The occurrence of tuberculosis (3.8%) and leptospirosis (6.33%) was detected by PCR. Through cross-sectional studies from suspected human population with associated risk factors for zoonotic diseases, the seropositivity of brucellosis (1.83-11%), listeriosis (1.01-10.18 %), leptospirosis (8.14-12.67%) and scrub typhus (1.78-20.34%) was recorded. The investigations on scrub typhus indicated bimodal pattern during the months of pre-monsoon and post-monsoon season with a peak in post-monsoon in human cases. Ornithonyssus bacoti mites were identified from the rodents as a vector harbouring Orientia tsutsugamushi. The bovine tuberculosis was detected in 1.43 per cent human cases employing molecular assay.
Interpretation & conclusions: The data indicated the occurrence of important zoonotic diseases adversely affecting the livestock health and human wellbeing. The scientific collaboration between veterinary and medical faculties has set an example for effective implementation of One Health (OH) programme for the establishment of National Institute of OH.

Keywords: Brucellosis - listeriosis - One Health - scrub thypus - surveillance - zoonotic diseases


How to cite this article:
Chaudhari SP, Kalorey DR, Awandkar SP, Kurkure NV, Narang R, Kashyap RS, Rahi M, Barbuddhe SB. Journey towards National Institute of One Health in India. Indian J Med Res 2021;153:320-6

How to cite this URL:
Chaudhari SP, Kalorey DR, Awandkar SP, Kurkure NV, Narang R, Kashyap RS, Rahi M, Barbuddhe SB. Journey towards National Institute of One Health in India. Indian J Med Res [serial online] 2021 [cited 2021 Jun 15];153:320-6. Available from: https://www.ijmr.org.in/text.asp?2021/153/3/320/314501

The public health challenges in today's world such as emerging and re-emerging infectious diseases, antimicrobial resistance, food security, biosafety and bio-security are associated with the changes in land use, population growth, urbanization, global travel and trade and climate change. As a result, a trans-disciplinary approach among human, animal and environmental health disciplines has gained support and visibility. On July 6, 2010 in Nagpur, India, the experts and scientists from medical and veterinary sciences in a national conference organized by the National Association of Welfare of Animals and Research in collaboration with Indian Medical Association (Nagpur Chapter) conceived the concept of establishing of a National Institute for Zoonoses (NIZ) at Nagpur. Since then, deliberations were held at the levels of the Indian Council of Medical Research (ICMR) and Indian Council of Agricultural Research (ICAR). Both the apex organizations were committed towards creating this imperative facility at Maharashtra Animal and Fishery Science University (MAFSU), Nagpur. Discussion on the setting up a dedicated facility was initiated. Subsequently, in March 2019, the ICMR declared to establish 'Centre for One Health (OH)', a satellite centre under National Institute of Virology, Pune in Nagpur. It is contemplated to be an independent institute though nomenclature may change from the NIZ to the National Institute for OH (NIOH). As a step towards activities of the institute, two research projects, funded by ICAR entitled 'Centre for Zoonoses under Niche Area of Excellence' to Nagpur Veterinary College (NVC), Nagpur, and another by ICMR to Mahatma Gandhi Institute of Medical Sciences (MGIMS), Sewagram, and Central India Institute of Medical Research (CIIMS), Nagpur, were sanctioned.


   Material & Methods Top


The study was conducted under the projects 'Centre for Zoonoses' sanctioned by the ICAR and ICMR to NVC and CIIMS, Nagpur, and MGIMS, Sewagram, during 2015 to 2019. The zoonotic diseases namely  Brucellosis More Details, listeriosis, tuberculosis, leptospirosis and scrub typhus were studied at the Centre for Zoonoses at NVC, Nagpur. the MGIMS, Sewagram, was assigned brucellosis, leptospirosis and scrub typhus, CIIMS worked on brucellosis, listeriosis and bovine tuberculosis. The research work with respect to disease surveillance and molecular detection of the pathogens was undertaken.

These studies were approved by the Institutional Ethics Committees (vide reference No. NVC/IAEC/19; MGIMS/IEC/MICR/118/2014 and 01/CIIMS/ICMR/09/14) of NVC, CIIMS and MGIMS. The samples were collected with prior consent of the animal owners and with written consent from human participants.

The team from the NVC, over a period of four years, collected the clinical samples from livestock (blood, serum, nasal swabs and vaginal swabs), other animals (blood and serum) and their human contacts (blood and serum) from different regions of Central India (Maharashtra, Madhya Pradesh, Chhattisgarh and Telangana). The samples were collected randomly. Further the number of samples included for screening for particular disease was based on the clinical symptoms. The details of clinical samples are presented in [Table 1].
Table 1: Details of the clinical samples collected

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At MGIMS, Sewagram, of the 3454 individuals, 1726 (49.97%) suspects with acute undifferentiated fever (AUF) were recruited from a tertiary care hospital. From the community, out of 10,000 population belonging to seven villages, 98 individuals were recruited by house-to-house visits over a period of one and a half year. Further, 166 individuals were selected from 8808 patients attending a rural hospital. The blood samples (2.5 ml) collected from these individuals were screened for seropositivity for brucellosis, leptospirosis and scrub typhus. The CIIMS, Nagpur, collected clinical blood samples from Central Indian population having animal–human interface. A total of 7026 blood samples were collected through cross-sectional studies from suspected populations with associated risk factors for seroprevalence against brucellosis, listeriosis and bovine tuberculosis.

The seroprevalence of listeriosis was studied by in-house standardized listeriolysin-O based indirect IgG ELISA[1],[2]. Screening for brucellosis was conducted on the basis of the detection of antibodies against  Brucella More Details spp. by using in-housed standardized indirect IgG ELISA against lipopolysaccharide (LPS)[3]. Standard tube agglutination test (STAT) and Rose Bengal plate test (RBPT) were performed according to the procedure described by the World Organization for Animal Health (OIE)[4]. The samples from animals were screened for tuberculosis and leptospirosis by targeting the IS1160 gene[5] and secY gene[6], respectively.

Scrub typhus among various occupationally exposed patients, abattoir workers, sanitary workers and livestock owners was detected employing IgM-ELISA (InBios International, USA) and Immuno Fluroscent assay (IFA) (Fuller Laboratories, USA) as per the manufacturer's instructions. The samples from rodents (blood and tissue) and vectors were investigated for the 56 and 47 kDa outer membrane protein genes of Orientia tsutsugamushi[7].


   Results Top


Brucellosis: Of 9855 serum samples collected from animals, a total of 1152 (11.69%) and 898 (9.12%) samples were found to be positive for brucellosis by ELISA and by RBPT, respectively. Of the 3051 human serum samples tested, 56 (1.83%), 43 (1.40%) and 12 (0.39%) were positive by ELISA, RBPT and STAT, respectively [Table 2]. The antibodies for brucellosis were detected in 6.31 per cent samples collected from the human cases of AUF attending a tertiary care centre. In the samples collected from seven villages to central India, the occurrence of brucellosis was 11 per cent. Through the hospital-based observational retrospective studies, in suspected human cases with associated neurological morbidities, the presence of neurobrucellosis was found to be 8.4 per cent.
Table 2: Region wise per cent positivity to targeted diseases in humans and animals

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Listeriosis: In the present investigation, seropositivity for Listeria IgG was observed to be 7.66 per cent among animals (755/9855), whereas, of the 3346 human serum samples, 1.01 per cent were found to be positive. Of the 88 samples from women with spontaneous abortion, five (5.68%) were positive. Among the 98 samples collected from Central Indian human population, 9.3 per cent were positive for Listeria.

Leptospirosis: From endemic regions of leptospirosis, namely Konkan region and East Vidarbha of Maharashtra and Telangana, animal (1783) and human (1252) blood samples were tested. The secY gene was detected in 113 (6.33%) and 102 (8.14%) samples, respectively [Table 2] and [Table 3]. Among the 1726 human cases of AUF attending a tertiary care centre, 12.67 per cent (218 were positive for leptospirosis. Among the community of seven villages, the positivity for leptospirosis was seven per cent.
Table 3: Species-wise per cent positivity to targeted diseases

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Tuberculosis: A total of 8363 samples from animals were screened for tuberculosis by targeting the IS6110 gene, wherein 318 (3.8%) were found to be positive. Among the Central Indian human population who were in contact with animals; the overall occurrence of tuberculosis was 1.43 per cent and the hospital-based observational retrospective studies showed 12.3 per cent human cases of tuberculus meningitis.

Scrub typhus: A study on scrub typhus among various occupationally exposed patients, abattoir workers, sanitary workers and livestock owners was carried out. Of the, 462 serum samples, 94 (20.34%) were found to be positive by IgM-ELISA and 24 (5.14%) samples turned out to be positive by IFA [Table 2] and [Table 3]. The IFA could identify the infection of O. tsutsugamushi at strain level, viz. Karp, Gilliam, Kato and Boryong.

Blood and tissue samples of rodents trapped from different locations in Central India were processed for the detection of scrub typhus. The 56 kDa outer membrane protein gene of O. tsutsugamushi was detected from 10 of 59 samples, and the 47 kDa protein gene was detected from four of 59 samples by nested-PCR. Ornithonyssus bacoti mites from the rodents were identified as a vector harbouring O. tsutsugamushi. The seasonal variations in the occurrence in O. tsutsugamushi in rodents and mites were studied by PCR detection targeting the 56 and 47 kDa genes. During pre-monsoon season, O. tsutsugamushi was detected in 12 and 10 per cent samples, whereas during post-monsoon season, the respective detection rates were 13.33 and 26.66 per cent predicting a bimodal pattern during the months of pre- and post-monsoon season with a peak in post-monsoon. The study conducted on the human cases having AUF attending a tertiary care centre indicated 15.79 per cent cases of scrub typhus. In the community of seven villages, four per cent positivity for scrub typhus was recorded.


   Discussion Top


The global threats of zoonotic diseases are well known. Surveillance data help to identify areas and populations at increased risk for infection, improving ability to direct and prioritize health interventions, to monitor the effectiveness, timeliness and cost-effectiveness of prevention and control efforts and to identify gaps and new prevention strategies. In recent years, the OH approach to manage endemic and emerging/re-emerging zoonotic diseases has been promoted by international human and animal Health agencies. The presence of important zoonotic diseases, viz. listeriosis, brucellosis, tuberculosis, leptospirosis and scrub typhus, recorded in the present collaborative research was in accordance with Indian reports[1],[8],[9],[10],[11],[12],[13],[14],[15],[16],[17],[18],[19],[20],[21]. The study on vectors revealed novel findings, especially in scrub typhus and listeriosis.

Listeria monocytogenes has potential to infect humans and animals, resulting into septicaemia, gastroenteritis, meningitis, meningio-encephalitis, still birth and abotions[22],[23]. The Listeria strains have been isolated from women with poor obstetric history and premature births[24], buffaloes with reproductive disorders[2],[25] and foods of animal and fish origin[26]. The present study reported 7.66 and 1.01 per cent seropositivity in animals and humans for Listeria IgG, respectively, along with 5.6 per cent cases of spontaneous abortions in women and 9.3 per cent of Listeria meningitis in human patients.

The seropositivities for brucellosis in animals by ELISA and RBPT were 11.69 and 9.12 per cent, respectively. Earlier investigations recorded 6.5 per cent prevalence in organized farms[27]; flock-wise incidence rate in sheep and goats was around 50 per cent[3] and 17.8-55.5 per cent in occupationally exposed veterinarians[28],[29]. Although brucellosis in animals is involved in orchitis, arthritis, still births and late abortions, the most human cases exhibit undulant fever, headache, back pain, myalgia and arthralgia. Occupationally exposed people have more chances of getting infected during animal handling and care. Higher positivity was recorded among the individuals from the regions where livestock farming was intensified[29].

Tuberculosis has been a challenge to healthcare system. Our explorations indicated 1.43 and 3.80 per cent positivity of M. bovis in humans and farm animals, respectively. High occurrence of bovine tuberculosis was recorded in the persons living in tuberculosis-endemic region. These patients lived in poorly ventilated houses and exhibited similar symptoms to M. tuberculosis[30]. Our reports in animals contradicted with earlier finding reporting 15-28 per cent infection of M. tuberculosis in animals[31]; however, 0.4-51.2 per cent prevalence was recorded in different studies[32].

The occurrence of leptospirosis was reported from paddy areas where there are water logging conditions, soil pH is alkaline and rodent population is high[33]. Our findings from animal in the endemic regions of Konkan and East Vidarbha and Telangana recorded 6.33 and 8.14 per cent occurrence in animals and humans, respectively, along with 12.67 per cent among the human cases of AUF attending a tertiary care centre. Additionally, seven per cent positivity was reported in human population of seven selected villages from Central India. Significant reduction in positivity was reported earlier in a tertiary health care centre in north India from 26.90 per cent in 2000-2010 to 6.47 per cent in 2015-2018[34]. Leptospiral antibodies were found in 19.7 per cent rodents and dogs from Mumbai, India of which only 5.93 per cent samples showed the presence of the pathogen as confirmed by quantitative PCR and isolation[35].

Rickettsiosis has been reported from almost all parts of India[36]. We reported 20.34 per cent seropositivity of scrub typhus among various occupationally exposed patients, abattoir workers, sanitary workers and livestock owners of Central India with involvement of O. tsutsugamushi in 5.14 per cent cases. O. tsutsugamushi was detected in rodents, ticks and O. bacoti mites from the study area[37]. Our study demonstrated that the O. bacoti mites harboured this pathogen which could be transmitted among rodent population via bites and rodents might further perpetuate the infection to human being. Earlier, flea-borne rickettsiosis was reported in human from the Western Himalayan region[38].

The major highlight of the study was the collaborative work conducted which provided important links towards strengthening of the One Health approach that linked human and animals for prevention and control of zoonotic infections and their drivers through holistic and interdisciplinary approaches. The infrastructure and technical expertise developed at the Centre for Zoonoses at NVC could be utilized for addressing the public health issues. The training programmes could develop skilled workforce in the various aspects of zoonoses wherein participants from veterinary, medical and other allied fields would participate as a part of capacity building programmes.

In conclusion, the present study indicated the occurrence of important zoonotic diseases that affected both animal and human health. The upcoming NIOH will be developed to serve as national leader in zoonoses and the think tank devoted to One Health involving animals, human, wild life and environment by providing inter-sectoral and inter-disciplinary approach for surveillance, response, research, capacity building and advocacy/communication for prevention and control of zoonotic diseases.

Acknowledgment: Authors acknowledge authorities at Maharashtra Animal and Fishery Science Universiity (MAFSU) Nagpur, Mahatma Gandhi Institute of Medical Sciences (MGIMS), Sevagram and Central India Institute of Medical Sciences (CIIMS), Nagpur for providing the facilities to execute the research work. Authors thank Dr Mohan Gupte, Chairman Joint ICMR-ICAR Committee on Zoonoses, for his valuable contribution in formulating and monitoring the research projects.

Financial support & sponsorship: The financial support was received from the Indian Council of Agricultural Research and the Indian Council of Medical Research, New Delhi.

Conflicts of Interest: None.

 
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