Identification of sibling species status of Anopheles culicifacies breeding in polluted water bodies in Trincomalee district of Sri Lanka

The present study was conducted to determine the prevalence of filariasis causing parasites in adult mosquitoes and vector mosquito larval breeding in four Medical Officer of Health (MOH) areas in Gampaha district, Sri Lanka. Adult female mosquitoes at their resting places were collected using a prokopack aspirator operated twice a day from 7.00 am to 8.00 am and 8.00 pm to 9 pm in predetermined dates. Microfilarial worms in dissected mosquitoes were morphologically identified. Nine species of mosquitoes, namely, Culex quinquefasciatus, Cx. pipiens, Cx. fuscocephala, Cx. gelidus, Armigeres subalbatus, Mansonia uniformis, Ma. annulifera, Aedes aegypti, and Ae. Albopictus, were captured. A total of 1194 mosquito larvae were collected that belonged into three genera, namely, Culex (62.73%), Armigeres (25.62%), and Mansonia (11.64%), from blocked drains, polluted drains, blocked canals, large polluted water bodies, stagnant water bodies, marsh lands, rice field mudflats, and concrete pits. Large polluted water bodies (Shannon-Wiener diversity index/H’ = 1.5591) were the most diversed habitat type. In breeding water, average pH mainly lied in between 6 and 8 and average dissolved oxygen ranged from 3 to 7 mg/L. Cx. quinquefasciatus and Armigeres subalbatus adult female mosquitoes captured from Kelaniya MOH area were positive for microfilariae and were identified as Wuchereria bancrofti and Dirofilaria repens, respectively. This study concludes possible lymphatic filariasis situation is in extremely very low level persistent (0.06%) where transmission cannot be sustained and is restricted only to isolated pockets in the study area. The zoonotic strains of filariasis causing subcutaneous dirofilariasis in humans by Dirofilaria repens is continuing to survive due to the presence of stray dogs that serve as reservoir hosts.

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Anopheles culicifacies sibling species B and E in Sri Lanka differ in longevity and in their susceptibility to malaria parasite infection and common insecticides

Medical and Veterinary Entomology ◽

10.1111/j.1365-2915.2006.00601.x ◽

2006 ◽

Vol 20 (1) ◽

pp. 153-156 ◽

Cited By ~ 16

Author(s):

S. N. Surendran ◽

M. S. Ramasamy ◽

B. G. D. N. K. De Silva ◽

R. Ramasamy

Keyword(s):

Sri Lanka ◽

Sibling Species ◽

Malaria Parasite ◽

Parasite Infection ◽

Anopheles Culicifacies ◽

Malaria Parasite Infection

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Molecular studies of Anopheles culicifacies (Diptera: Culicidae) in Sri Lanka: Sibling species B and E show sequence identity at multiple loci

European Journal of Entomology ◽

10.14411/eje.2006.025 ◽

2006 ◽

Vol 103 (1) ◽

pp. 233-237 ◽

Cited By ~ 6

Author(s):

Sinnathamby Noble SURENDRAN ◽

Nicola J. HAWKES ◽

Andrew STEVEN ◽

Janet HEMINGWAY ◽

Ranjan RAMASAMY

Keyword(s):

Sri Lanka ◽

Sibling Species ◽

Anopheles Culicifacies ◽

Sequence Identity ◽

Multiple Loci ◽

Molecular Studies ◽

Show Sequence Identity

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Conceptual model for minimizing the risk of water pollution in the Kemerovo region

MINING INFORMATIONAL AND ANALYTICAL BULLETIN ◽

10.25018/0236-1493-2020-61-0-107-118 ◽

2020 ◽

pp. 107-118 ◽

Cited By ~ 1

Author(s):

E. Yu. Kulikova ◽

Ju. A. Sergeeva

Keyword(s):

Water Pollution ◽

Conceptual Model ◽

Water Contamination ◽

Coal Industry ◽

Water Bodies ◽

Polluted Water ◽

Mining Operations ◽

Mine Waters ◽

Critical Limit

One of the problems of functioning of coal industry enterprises is the formation of mine waters, which are discharged into water bodies and cause their dangerous pollution. The total volume of water pumped by the enterprise includes up to 15 % for the recycling cycle, the remaining 85% is discharged to surface water bodies. As a result, the ecological balance of coal regions is disturbed, their sanitary and hygienic state on the environment worsens, and the quality of coal is reduced due to the intake of polluted water for technological operations. The volume of mine water contamination increases during mining operations at deeper horizons and in difficult mining and hydrogeological conditions. In turn, this leads to pollution and depletion of underground aquifers and the formation of environmental risk factors. In Kuzbass, all these factors contribute to the development of water crisis, since the state of surface reservoirs has already reached a critical limit. Especially dangerous is the process of liquidation of mines. Closing mines and sections disrupt natural water flows, resulting in all water from the aquifers going to deeper horizons. More pollutants enter the water, which poison the underground hydrosphere of the regions. The paper analyzes the pollutants entering the underground and surface hydro grid at coal-fired plants and offers a Conceptual model for minimizing the risk of water pollution.

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