Abstract:
:Mosquitoes transmit serious human diseases, causing millions of deaths every year. Use of synthetic insecticides to control vector mosquitoes has caused physiological resistance and adverse environmental effects in addition to high operational cost. Insecticides of botanical origin may serve as suitable alternative biocontrol techniques in the future. The present investigations were made to evaluate the repellent, ovicidal and oviposition-deterrent potential of leaf hexane and chloroform extracts of Aegle marmelos, Andrographis lineata, Andrographis paniculata, Cocculus hirsutus, Eclipta prostrata and Tagetes erecta against Anopheles subpictus Grassi (Diptera:Culicidae). The hexane extract of A. lineata was more effective in exhibiting the repellent action against the mosquito as compared with A. marmelos extract. Complete protections for 150 min were found in hexane extract of A. lineata at 500 ppm against An. subpictus bites. Mean percent hatchability of the ovicidal activity was observed 24 h after treatment. The percent hatchability was inversely proportional to the concentration of extract and directly proportional to the eggs. No hatchability was observed with hexane and chloroform extracts of A. lineata, A. paniculata and hexane extract of T. erecta were exerted at 1,000 ppm. The percentage of effective oviposition repellency of 93.07, 93.95, 98.03, 90.43, 92.63, 81.53, 94.81, 97.50, 97.26, 92.22, 82.85 and 72.77 at 500 ppm and the lowest repellency of 62.03, 53.64, 73.47, 59.05, 57.95, 48.17, 62.22, 72.99, 75.48, 67.77, 40.57 and 52.11 at 31.25 ppm in hexane and chloroform extracts of A. marmelos, A. lineata, A. paniculata, C. hirsutus, E. prostrata and T. erecta, respectively. The oviposition activity index (OAI) values revealed that the solvent plant extracts have deterrent effect, and they caused a remarkable negative response resulting in oviposition of very few eggs. These results clearly reveal that the hexane extract of A. lineata, served as a potential repellent, ovicidal and oviposition- deterrent against An. subpictus.
journal_name
Trop Biomedjournal_title
Tropical biomedicineauthors
Elango G,Abdul Rahuman A,Bagavan A,Kamaraj C,Abduz Zahir A,Rajakumar G,Marimuthu S,Santhoshkumar Tsubject
Has Abstractpub_date
2010-08-01 00:00:00pages
143-54issue
2eissn
0127-5720issn
2521-9855journal_volume
27pub_type
杂志文章abstract::Escherichia coli (E. coli) strains are the major cause of urinary tract infections (UTI) and belong to the large group of extra-intestinal pathogenic E. coli. The purposes of this study were to determine the antibiotic resistance profile, virulence genes and phylogenetic background of E. coli isolates from UTI cases. ...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2014-03-01 00:00:00
abstract::Angiostrongylus cantonensis, the nematode lungworm of rats, has a XX/X0 sex-determination mechanism. The chromosome constitution consists of 10 autosomes, with 2n=12, XX in the female and 2n=11, X0 in the male. Meiosis-I shows five bivalents and one univalent for the male worm, and six bivalents for the female worm. T...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2009-12-01 00:00:00
abstract::In this case series report we aim to report a Disseminated Intravascular Coagulation (DIC)-like syndrome associated with Hemiscorpius lepturus sting in 4 individuals and a novel management protocol for this life-threatening condition that comprised partial exchange transfusion in severe scorpionism. ...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2011-12-01 00:00:00
abstract::In the present study, serum samples from 402 sheep and 216 goats were collected from 5 counties in Jinzhou from August to October 2012 and antibodies to Toxoplasma gondii were detected by modified agglutination test (MAT). Overall, 104 (16.8%) had antibodies to T. gondii with antibody titres of 1:25 to 1:800. Seroposi...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2015-09-01 00:00:00
abstract::Studies were carried out on the residual efficacy of Bacillus thuringiensis H-14 (water dispersible granule, VectoBac ABG 6511) as direct application in the control of Aedes larvae in the field. Field Aedes sp populations in the earthen and glass jars were predetermined before initiation of the trial. On confirmation ...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2006-06-01 00:00:00
abstract::Toxoplasmosis can cause serious disease in immunocompromised patients and to congenitally infected foetuses. Appropriate laboratory investigations in potential cases of acute Toxoplasma infection are important. Excretory secretory antigen (ESA) is immunogenic during both human and experimental infections, theref...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2011-12-01 00:00:00
abstract::The emergence of bone marrow micronucleated polychromatic erythrocytes (MN-PCE) in rats experimentally infected with Trypanosoma brucei brucei was examined in order to understand the bone marrow effects in trypanosomiasis infection. Bone marrow was collected for micronucleus assay while blood samples were collected fr...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2014-06-01 00:00:00
abstract::A survey of cockroach fauna was carried out on the 3 inhabited islands of the Ogasawara chain island of Japan, namely, Chichijima island, Hahajima island and Iwo island. Seven species, namely, Periplaneta americana (Linnaeus, 1758), Periplaneta australasiae (Fabricius, 1775), Blattella lituricollis (Walker, 1868), Ony...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2013-03-01 00:00:00
abstract::A study was conducted to evaluate the infection status of Blastocystis hominis in children from four public schools in Phuttamonthon district, Nakhon Pathom province, Thailand during November to December 2004. A total of 814 faecal specimens were used for B. hominis cultivation using Jones' medium. Mixed infections wi...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2006-06-01 00:00:00
abstract::This study reports for the first time molecular detection of Anaplasma platys infection in 4 (13.3%) of 30 Malaysian dogs investigated. A low occurrence (3.3%) of Babesia gibsoni was also noted, being detected in one of the 30 dogs. Rickettsia, Bartonella, Orientia tsutsugamushi, and Ehrlichia DNA were not detected in...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2013-06-01 00:00:00
abstract::In the present study, a total of 1,235 porcine serum samples were collected from 9 counties in Jilin Province (40°52'~46°18'N,121°38'~131°19'E), northeastern China from August to October 2013, and the seroprevalence of Toxoplasma gondii infection was tested by indirect haemagglutination assay (IHA). The results showed...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2015-03-01 00:00:00
abstract::The prevalence of sarcocystosis in cattle and water buffaloes from peninsular Malaysia was investigated in abattoirs in Selangor state, February, 2011, to March, 2012. Fresh muscle samples were collected from the tongue, heart, oesophagus, diaphragm and skeletal muscles of 102 cattle and 18 water buffaloes. Each sampl...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2013-12-01 00:00:00
abstract::Over a one-year period, based on a random cluster sampling design, 661 faecal samples from natural cases of diarrheic calves were taken in Fars province of Iran. The samples were taken from the 267 diarrheic calves of high and 394 diarrheic calves of average producing Holstein dairy cows. Faecal samples were col...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2011-08-01 00:00:00
abstract::Dengue virus (DV) infections are a serious public health problem and there is currently no vaccine or drug treatment. NS2B/NS3 protease, an essential enzyme for viral replication, is one of the promising targets in the search for drugs against DV. In this research work, virtual screening (VS) was carried out on four m...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2013-09-01 00:00:00
abstract::Hand, foot and mouth disease (HFMD) is a common viral infection among infants and children. The major causative agents of HFMD are enterovirus 71 (EV71) and coxsackievirus A16 (CVA16). Recently, coxsackievirus A6 (CVA6) infections were reported in neighboring countries. Infected infants and children may present with f...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2014-12-01 00:00:00
abstract::Scanning electron microscope (SEM) images of two dust mites, Sturnophagoides brasiliensis and Sturnophagoides halterophilus, are presented to provide an improved visualization of the taxonomic characters of these mites. Sturnophagoides halterophilus can be differentiated from S. brasiliensis by their expanded genu and...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2008-12-01 00:00:00
abstract::A cohort study was performed to evaluate the incidence and risk factors of Giardia duodenalis infection in an orphanage in suburban area outside Bangkok, central Thailand. Stool specimens were examined for the presence of G. duodenalis in January 2007, May 2007 and January 2008. Of 892 stool specimens from 481 individ...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2014-09-01 00:00:00
abstract::Signal fly, Scholastes sp. (Diptera: Platystomatidae) was observed associated with animal carcasses in Malaysia. The first observation was on a monkey carcass, which was killed by using a handgun and immediately placed in a forested area in Gombak, Selangor while the second observation was on a pig that died of natura...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2008-12-01 00:00:00
abstract::A total of 29 female black flies were captured by a hand net as they swarmed around humans in Tam Dao National Park, Vinh Phuc Province, Vietnam. They included one species of the subgenus Gomphostilbia (Simulium (Gomphostilbia) asakoae Takaoka & Davies) and five species of the subgenus Simulium, of which one species i...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2014-12-01 00:00:00
abstract::The adulticidal activity of methanol extracts from three Malaysian plants namely Acorus calamus Linn., Litsea elliptica Blume and Piper aduncum Linn. against adult of Aedes aegypti (L.) were studied. Standard WHO bioassay tests were used to evaluate the effectiveness of these plant extracts. The hexane fraction from m...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2004-12-01 00:00:00
abstract::Routine surveillance on resistant status of field mosquito populations is important to implement suitable strategies in order to prevent pest outbreaks. WHO test kit bioassay is the most frequent bioassay used to investigate the susceptibility status of field-collected mosquitoes, as it is relatively convenient ...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2011-08-01 00:00:00
abstract::Poultry farming not only provides high nutritious food but also creates employment opportunity for rural masses. Documented evidences elaborates that helminth parasitism is most deciduous problem of chickens especially in developing world. Ascaridia (A.) galli, a nematode of small intestine, has been considered as the...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2015-03-01 00:00:00
abstract::This study was conducted to investigate the low prevalence of Dirofilaria immitis in dogs in Johor Bahru as reported by veterinary practitioners, using wet blood mount, Knott's Concentration Test and two heartworm antigen test kits (IDEXX Canine SNAP® 4Dx and RapiGEN®). This study also compared the two test kits...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2012-03-01 00:00:00
abstract::Understanding the genetic diversity, extent and distribution of variant forms of Plasmodium vivax parasites is crucial in the development of effective control measures and in Orissa, a hyperendemic state in the eastern part of India, the polymorphic nature of P. vivax isolates is largely lacking. The result of the stu...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2010-12-01 00:00:00
abstract::Crab is an important source of food allergen. Tropomyosin represents the main crab allergen and is responsible for IgE cross-reactivity between various species of crustaceans. Recently, other new crab allergens including arginine kinase have been identified. However, information on allergens of the local Portuni...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2012-09-01 00:00:00
abstract::Piophila casei (Linnaeus) (Diptera: Piophilidae) is reported from human cadavers in two separate forensic cases for the first time in Malaysia. Both bodies were found indoors. The first case, was that of a male of unknown nationality and age and also contained maggots of the muscid Ophyra spinigera (Stein). The second...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2008-08-01 00:00:00
abstract::The present study was carried out to determine the prevalence of Theileria lestoquardi from two districts of Khyber Pukhtoon Khwa (Kohat and Peshawar) in Pakistan and also to report the risk factors associated with the spread of ovine theileriosis. A total of 165 blood samples were collected from sheep (N = 44) and go...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2015-06-01 00:00:00
abstract::Field bioefficacy of residual-sprayed deltamethrin against Aedes vectors was evaluated in an urban residential area in Kuala Lumpur. The trial area consisted of single storey wood-brick houses and a block of flat. The houses were treated with outdoor residual spraying while the flat was used as an untreated control. I...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2005-12-01 00:00:00
abstract::During 2008-2009 a total of 67 individuals of rodents, Tetera indica, Meriones hurrianae, Meriones libycus and Gerbillus nanus were trapped in three areas, Bampor, Daman and Qasre Qand from Iranshahr and Nikshahr districts. There is a significant difference between comparative abundance of four species (P<0.05). A tot...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2013-03-01 00:00:00
abstract::The majority of amoeba infection are asymptomatic, but clinically intestinal amoebiasis or extra intestinal amoebiasis may result. Genital amoebiasis is very rare manifestation of extra intestial amoebiasis, but a case of amoebic scrotal abscess, seen in Surabaya. The invasive form of Entamoeba histolytica trophozoite...
journal_title:Tropical biomedicine
pub_type: 杂志文章
doi:
更新日期:2015-09-01 00:00:00