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Rajamannar Veeramanoharan

Rajamannar Veeramanoharan
ICMR-Vector Control Research Centre (VCRC) · Indian Council of Medical Research (Dept. Health Research)

Doctor of Philosophy

About

31
Publications
6,617
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142
Citations
Introduction
Vector Biology, Mosquito-borne diseases, Biology of Fleas and their Medical importance, Medically important ectoparasites on rodents and other companion animals.
Education
May 2017 - March 2024
Madurai Kamaraj University
Field of study
  • Zoology
June 1993 - May 1995
Madurai Kamaraj University
Field of study
  • Zoology

Publications

Publications (31)
Article
Full-text available
Malaria remains a significant public health problem in India. Although temperature influences Anopheline mosquito feeding intervals, population density, and longevity, the reproductive potential of the Plasmodium parasite and rainfall influence the availability of larval habitats, and evidence to correlate the impact of climatic factors on the inci...
Article
Full-text available
Aedes aegypti and Aedes albopictus mosquitoes spread major vector-borne viral diseases in tropical and sub-tropical regions of the globe. In this study, we sequenced the genome of Indian Ae. aegypti and Ae. albopictus and mapped to their reference genomes. Comparative genomics were performed between our strain and the reference strains. A total of...
Article
Full-text available
The target of kala-azar elimination was initially set in 2010 and was later extended several times to finally be fixed in 2020, which also passed without success. However, in 2022, India had come very close to complete elimination by achieving a 98.7% decline in kala-azar cases. While, at the final moments of achieving the long-awaited target of el...
Article
Full-text available
Background Understanding the relationship between blood-feeding and mating is important in effectively managing the most well-adapted vector insect, Aedes aegypti (Linnaeus). Although extensive studies have investigated the behavioural aspects of Aedes such as blood-feeding, mating, and their relationship, several knowledge gaps still exist. Theref...
Article
Full-text available
Background objectives: Scrub typhus, caused by Orientia tsutsugamushi present in small mammals harbouring the ectoparasites. A study was undertaken to detect the pathogen present in small mammals and its ectoparasites in the scrub typhus-reported areas. Methods: The small mammals (rodents/shrews) and its ectoparasites were screened for O. tsutsu...
Preprint
Full-text available
Aedes aegypti and Aedes albopictus mosquitoes spread major vector-borne viral diseases in tropical and sub-tropical regions of the globe. In this study, we sequenced the genome of Indian Ae. aegypti and Ae. albopictus and mapped to their reference genomes. Comparative genomics were performed between our strain and the reference strains. A total of...
Preprint
Full-text available
Background Malaria remains a significant public health problem in India. Although temperature influences Anopheline mosquito feeding intervals, population density, and longevity, the reproductive potential of the Plasmodium parasite and rainfall influences the availability of larval habitats, evidence to correlate the climatic factors with malaria...
Article
Full-text available
Fleas (Insecta: Siphonaptera) are India's most important vectors of plague and other flea-borne diseases. In India, the current record is 68 species which represents 2.56% of the total world fauna of the Order Siphonaptera, approximately 2652 flea species, including 35 genera (13.8%), 8 families (44.4%), and 8 subfamilies (29.6%). Due to the abunda...
Article
Full-text available
Background: Rodents and shrew living in the vicinity of human beings perform significant role to harbor different spe­cies of ectoparasites and thus act as the reservoir host for the spread of diseases to human and animals. Methods: This study was undertaken to determine the species composition of the medically important ectoparasites present in t...
Article
Full-text available
Japanese encephalitis (JE) is a very serious public health problem in India and the conducive environment permit its emergence in non-endemic areas in the country. There are constant changes taking place in the pattern of current agricultural practices and vector breeding habitats which had far-reaching consequences on the epidemiology of JE and th...
Article
Full-text available
The diseases transmitted by Aedes mosquitoes, such as dengue, chikungunya, yellow fever, and Zika, are ever-increasing. Rapid and unplanned urbanization adversely impacts various endemic species such as ants and facilitates the breeding of Aedes mosquitoes. We have observed the predatory potential of ants over Aedes eggs in urban breeding habitats,...
Article
Full-text available
Fleas (Insecta, Siphonaptera) are important vectors of plague and murine typhus in many parts of the world. Currently, about 2700 flea species were described in the world. The most common vector flea Xenopsylla cheopis is found throughout India, but X. astia, and X. brasiliensis are found less and limited in distribution associated with the domesti...
Article
Full-text available
Background & objectives: India imposed one of the world's largest nationwide lockdown in the aftermath of COVID-19 pandemic in March 2020 which was partly extended up to December. Some of the impacts of the COVID-19 lockdown on the economy, research, travel, education, and sports were readily apparent; the same was less obvious in the occurrence o...
Article
Full-text available
Mites act as the vectors of zoonotic vector-borne disease scrub typhus caused by the rickettsial pathogen Orientia tsutsugamushi. In India, scrub typhus is transmitted by the mite Leptotrombidium deliense. Rodents are the reservoirs and support the spread of this disease. Sarcoptes scabiei or the itch mite is causing scabies which is a common skin...
Article
Full-text available
The species composition and host preference of medically important fleas monitored in urban, semi-urban, and rural revealed 412(65%) and 222(35%) fleas. From urban and rural habitats 90 and 345 fleas were collected respectively. There was a significant difference between urban and rural habitats in flea abundance. From rodents and domestic animals...
Article
Full-text available
Chiggers, the larval Trombiculid mites are the vectors for scrub typhus. Rodents and shrews are the preferred host. Study made at different habitats of chiggers collected in rodents and shrews, revealed more number to Rattus rattus 95(63%) and Suncus murinus 33(22%). Rattus rattus 31(54%) and Suncus murinus 17(30%) alone contributed more in chigger...
Article
Full-text available
Background: An epidemiological, demographic and seasonal trend analysis of dengue and chikungunya seroprevalence was performed in five districts of Tamil Nadu during 2014-2018.Methods: Serum samples from the suspected patients were screened using IgM antibody ELISA.Results: Dengue and chikungunya seropositivity ranged from 17.9-68.2% and 14.9-58.3%...
Article
Full-text available
Background & objectives: Scrub typhus, an acute febrile Rickettsial disease is caused by the bacterial pathogen Orientia tsutsugamushi which is spread by the bite of infected chigger mite vectors belonging to the family Trombiculidae. A study was undertaken to find out the prevalence of scrub typhus among the indigenous population from Nilgiris, T...
Article
Full-text available
Background & objectives: Dengue emerged as an important public health problem in Tamil Nadu from 2000 onwards, reported in all the districts as an endemic disease of Tamil Nadu except Nilgiris district. So this study was carried out to understand the dengue epidemiology in Nilgiris district. Methods: Block-wise study was made at the Nilgiris dis...
Article
Full-text available
Background & objectives: Scrub typhus is caused by Orientia tsutsugamushi and transmitted by larval trombiculid chigger mites. Rodents and shrews are hosts for chigger mites in the transmission to humans. Wonder and Sherman traps are widely used for trapping rodents and shrews for the collection of ectoparasitic chigger mites. A comparative trappin...
Article
Full-text available
The main goal of this investigation was to record the ectoparasites living on rodents in scrub typhus endemic areas of Kerala state, India. Rodents captured alive using Sherman and wonder traps from four diverse habitations revealed, a total of 59 rodents/shrews constituted by 5 host species from families Muridae and Soricidae. In total, 1135 ectop...
Article
Full-text available
This study was carried out in Madurai district, Tamil Nadu State, South India. Ticks were collected from cows, dogs, goats, cats, and fowls. The overall percentage of tick infestation in these domestic animals was 21.90%. The following ticks were identified: Amblyomma integrum, Haemaphysalis bispinosa, Haemaphysalis paraturturis, Haemaphysalis turt...
Article
Full-text available
Japanese encephalitis virus is the major cause of encephalitis in India. To control the increasing incidence and fatal outbreaks, SA 14-14-2 vaccine was introduced initially in 104 endemic districts in phased manner from 2006 to 2011. As there is no data available before 2008 on the number of Japanese encephalitis (JE) cases excluding cases of Acut...
Article
Full-text available
Aim : Controlling vectors through source reduction measures and larviciding and fogging operation with insecticides are being carried out by the state health department during outbreak period. The present study was conducted to understand the susceptibility status of denguevector Aedesaegypti(Linnaeus, 1762) field strain towards various insecticide...
Article
Full-text available
The vector mosquitoes of dengue and chikungunya fever, Aedes aegypti and Aedes albopictus have adapted to feed on humans and undergo larval and pupal development in natural and artificial freshwater collections. Although several studies reported, still, much information is required to understand the successful survival of Aedes mosquitoes in small...

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