MyMedR

Observations on the development of a new filaria (Breinlia booliati, Singh and Ho, 1973) of a rat Rattus sabanus in the mosquito Aedes togoi

Ho BC, Singh M, Lim BL

J Helminthol, 1973;47(2):135-40.

PMID: 4724313

Matched MeSH terms: Larva/growth & development

Description of the final stadium larvae of Onychargia atrocyana Selys, 1865 from Sarawak, identified using DNA barcoding (Odonata: Zygoptera: Platycnemididae), with an overview of larval characters in the Platycnemididae

Orr AG, Dow RA

Zootaxa, 2015;4040(3):384-92.

PMID: 26624673 DOI: 10.11646/zootaxa.4040.3.9

The final stadium larva of Onychargia atrocyana Selys, 1865, is described and illustrated based on two female specimens collected at Gunung Mulu National Park, Sarawak, East Malaysia. The larvae were identified by matching the mitochondrial marker COI with that of known adult specimens from Gunung Mulu, Bintulu and Kuching in Sarawak and from Pahang state in West Malaysia. The specimens presented close matches with all adults in this gene. As O. atrocyana is a taxonomically isolated species with no close congeners in Borneo the determination is beyond doubt. O. atrocyana is the only member of the Onychargiinae for which the larva is known. It is compared with the known larvae of other platycnemidid subfamilies, and the possible significance of larval morphology in higher classification of the group is discussed.

Matched MeSH terms: Larva

Zoothamnium duplicatum infestation of cultured horseshoe crabs (Limulus polyphemus)

Shinn AP, Mühlhölzl AP, Coates CJ, Metochis C, Freeman MA

J Invertebr Pathol, 2015 Feb;125:81-6.

PMID: 25499897 DOI: 10.1016/j.jip.2014.12.002

An outbreak of the sessile peritrich Zoothamnium duplicatum in a pilot, commercial-scale Limulus polyphemus hatchery resulted in the loss of ∼96% (40,000) second/third instar larvae over a 61day period. peritrich growth was heavy, leading to mechanical obstruction of the gills and physical damage. The peritrichs were controlled without resultant loss of juvenile crabs by administering 10ppm chlorine in freshwater for 1h and the addition of aquarium grade sand; a medium into which the crabs could burrow and facilitate cleaning of the carapace. Peritrich identity was confirmed from a partial SSU rDNA contiguous sequence of 1343bp (99.7% similarity to Z. duplicatum).

Matched MeSH terms: Larva/drug effects; Larva/growth & development; Larva/parasitology

Simulium hiroyukii, a new species of the subgenus Gomphostilbia (Diptera: Simuliidae) from Mount Murud, Sarawak, Malaysia

Ya'cob Z, Takaoka H, Sofian-Azirun M

Zootaxa, 2015;3911(3):424-32.

PMID: 25661622 DOI: 10.11646/zootaxa.3911.3.8

Simulium (Gomphostilbia) hiroyukii is described based on females, males, pupae and larvae collected in Mount Murud, Sarawak, Malaysia. This new species is assigned to the Simulium darjeelingense species-group of the subgenus Gomphostilbia, and is characterized by the darkened fore coxae and the pupal gill with eight long filaments, of which middle and dorsal triplets have elongated primary and secondary stalks, respectively.

Matched MeSH terms: Larva

New species and records of black flies (Diptera: Simuliidae) from Vinh Phuc Province, Vietnam

Takaoka H, Sofian-Azirun M, Ya'cob Z, Chen CD, Lau KW, Pham HT

Zootaxa, 2014;3838(3):347-66.

PMID: 25081781 DOI: 10.11646/zootaxa.3838.3.6

Four new species of black flies are described, and three others are reported as newly recorded, based on adults reared from pupae, pupae and larvae collected in and near Tam Dao National Park, Vinh Phuc Province, Vietnam. New species include Simulium (Gomphostilbia) hongthaii sp. nov., S. (G.) tamdaoense sp. nov. (both species placed in the asakoae species-group), S. (Simulium) taythienense sp. nov. and S. (S.) xuandai sp. nov. (the two latter species placed in the striatum species-group). Newly recorded species are S. (G.) brinchangense Takaoka, Sofian-Azirun & Hashim, S. (Nevermannia) aureohirtum Brunetti and S. (S.) brevipar Takaoka & Davies. These discoveries increase the number of species of black flies known in Vietnam from 21 to 28.

Matched MeSH terms: Larva/anatomy & histology; Larva/classification; Larva/growth & development

Fulltext Aural myiasis in a neonate in peninsular Malaysia

Ahmad NW, Ismail A, Jeffery J, Ibrahim S, Hadi AA, Ibrahim MN, et al.

Parasit Vectors, 2009;2(1):63.

PMID: 20003466 DOI: 10.1186/1756-3305-2-63

Myiasis is a pathological condition in humans and animals caused by various species of dipterous larvae. Myiasis which occurs in a newborn baby is referred as neonatal myiasis. It is a rare condition and there are only a few reports to date. A case of neonatal aural myiasis in a two day old infant is reported in this paper.

Matched MeSH terms: Larva

Fulltext A new genus and species of arboreal toad with phytotelmonous larvae, from the Andaman Islands, India (Lissamphibia, Anura, Bufonidae)

Chandramouli SR, Vasudevan K, Harikrishnan S, Dutta SK, Janani SJ, Sharma R, et al.

Zookeys, 2016.

PMID: 26877687 DOI: 10.3897/zookeys.555.6522

A new bufonid amphibian, belonging to a new monotypic genus, is described from the Andaman Islands, in the Bay of Bengal, Republic of India, based on unique external morphological and skeletal characters which are compared with those of known Oriental and other relevant bufonid genera. Blythophryne gen. n. is distinguished from other bufonid genera by its small adult size (mean SVL 24.02 mm), the presence of six presacral vertebrae, an absence of coccygeal expansions, presence of an elongated pair of parotoid glands, expanded discs at digit tips and phytotelmonous tadpoles that lack oral denticles. The taxonomic and phylogenetic position of the new taxon (that we named as Blythophryne beryet gen. et sp. n.) was ascertained by comparing its 12S and 16S partial genes with those of Oriental and other relevant bufonid lineages. Resulting molecular phylogeny supports the erection of a novel monotypic genus for this lineage from the Andaman Islands of India.

Matched MeSH terms: Larva

Fulltext Intricate predatory decisions by a mosquito-specialist spider from Malaysia

Jackson RR, Li D, Woon JR, Hashim R, Cross FR

R Soc Open Sci, 2014 Oct;1(2):140131.

PMID: 26064534 DOI: 10.1098/rsos.140131

Paracyrba wanlessi is a southeast Asian jumping spider (Salticidae) that lives in the hollow internodes of fallen bamboo and preys on the larvae, pupae and adults of mosquitoes. In contrast to Evarcha culicivora, an East African salticid that is also known for actively targeting mosquitoes as preferred prey, there was no evidence of P. wanlessi choosing mosquitoes on the basis of species, sex or diet. However, our findings show that P. wanlessi chooses mosquitoes significantly more often than a variety of other prey types, regardless of whether the prey are in or away from water, and regardless of whether the mosquitoes are adults or juveniles. Moreover, a preference for mosquito larvae, pupae and adults is expressed regardless of whether test spiders are maintained on a diet of terrestrial or aquatic prey and regardless of whether the diet includes or excludes mosquitoes. Congruence of an environmental factor (in water versus away from water) with prey type (aquatic versus terrestrial mosquitoes) appeared to be important and yet, even when the prey were in the incongruent environment, P. wanlessi continued to choose mosquitoes more often than other prey.

Matched MeSH terms: Larva

Female Armigeres (Leicesteria) flavus holding an egg raft with her hind legs

Miyagi I, Toma T, Okazawa T, Mogi M, Hashim R

J Am Mosq Control Assoc, 2005 Dec;21(4):466-8.

PMID: 16506575

During a mosquito survey in Ulu Gombak, Selangor, Peninsular Malaysia, October 2-16, 2003, we observed a peculiar oviposition habit of Armigeres flavus. This strange behavior is described and illustrated with photographs; although it is well known, no detailed description has been made previously.

Matched MeSH terms: Larva

Update on temporal and spatial abundance of dengue vectors in Penang, Malaysia

Saifur RG, Hassan AA, Dieng H, Ahmad H, Salmah MR, Satho T, et al.

J Am Mosq Control Assoc, 2012 Jun;28(2):84-92.

PMID: 22894118

It is important to obtain frequent measurements of the abundance, distribution, and seasonality of mosquito vectors to determine the risk of disease transmission. The number of cases of dengue infection has increased in recent years on Penang Island, Malaysia, with recurring epidemics. However, ongoing control attempts are being critically hampered by the lack of up-to-date information regarding the vectors. To overcome this problem, we examined the current situation and distribution of dengue vectors on the island. Residences throughout the urban, suburban, and rural areas were inspected through wet and dry seasons between February 2009 and February 2010. Two vectors were encountered in the survey, with Aedes aegypti present in especially high numbers mostly in urban areas. Similar observations were noted for Ae. albopictus in rural areas. The former species was more abundant in outdoor containers, while the latter showed almost equivalent abundance both outdoors and indoors. The dengue virus was active in both urban and rural areas, and the number of cases of infection was higher in areas where Ae. aegypti was predominant. The abundance of immature Ae. albopictus was positively correlated with rainfall (r2 = 0.461; P < 0.05), but this was not the case for Ae. aegypti. For both species, the size of immature populations tended to increase with increasing intensity of rain, but heavy rains resulted in population loss. In addition to updating data regarding the larval habitats and locations (outdoors and indoors), this study highlighted the importance of spatial vector control stratification, which has the potential to reduce costs in control programs.

Matched MeSH terms: Larva/classification; Larva/physiology; Larva/virology

Evaluation of pyrethroids lambda-cyhalothrin, deltamethrin and permethrin against Aedes albopictus in the laboratory

Sulaiman S, Omar B, Jeffery J, Busparani V

J Am Mosq Control Assoc, 1991 Jun;7(2):322-3.

PMID: 1895095

Three pyrethroids were evaluated in the laboratory against Aedes albopictus females by exposure to insecticide impregnated papers, and to 4th instar Ae. albopictus larvae as insecticide solutions. Lambda-cyhalothrin was found to be the most effective pyrethroid when tested against Aedes albopictus adult females and larvae compared with that of deltamethrin and permethrin.

Matched MeSH terms: Larva

Fulltext Study on the distribution and abundance of Aedes Aegypti and Aedes Albopictus in different environment settings for highrise buildings

Zuhainy Ahmad Zhaki, Nazri Che Dom, Ibrahim Ahmed Alhothily

Malaysian Journal of Medicine and Health Sciences, 2019;15(104):91-98.

MyJurnal

Vector surveillance in high-rise buildings is important to predict and monitor the presence of vectors regarding their abundance and distribution. In this study, the infestation profile of Aedes aegypti and Aedes albopictus species in different environmental settings were investigated. Methods: Four high-rise apartments in four different localities were selected for ovitrap surveillance. Fifty ovitraps were placed in semi indoor and outdoor settings. Results: A total of 507 (42.8%) from ovitraps showed the presence of the Aedes species larvae. Out of these, 170 (33.5%) of the positive ovitraps were those placed in semi indoor and 337 (66.5%) in outdoor. Of the total 16,613 Aedes larvae found, 4,130 (24.9%) were from semi indoor, and 12,483 (75.1%) from outdoor. In terms of distribution, Ae. albopictus was predominantly found in outdoor environments (POI=87.5%; MLT=36.45 larvae). Ae. aegypti was also found in outdoor environments (POI=14.89%; MLT=8.26 larvae). There was a significant difference in POI for both Ae. aegypti and Ae. albopictus in the two different environments but no significant difference was observed in MLT, indicating that the density of the Aedes species in both environments was well distributed. Conclusion: In this study, the patterns of Aedes habitat in high-rise apartments were observed. This study has shown an invasion and adaptation of Aedes mosquitoes into the ecosystems of high-rise buildings. It can be concluded that housing designs and the condition of the surrounding environment affects the infestation profile and the distribution of Aedes mosquitoes.

Matched MeSH terms: Larva

Colonization of Rabbit Carcasses by Drain Fly Larvae, Psychoda sp. (Diptera: Psychodidae): The First Report

Azmiera N, Low VL, Heo CC

Acta Parasitol, 2021 Jun;66(2):706-709.

PMID: 33389626 DOI: 10.1007/s11686-020-00313-z

INTRODUCTION: Psychoda sp. is often collected from patchy habitats such as sewers, drains and decomposing organic matters. The discovery of Psychoda sp. in forensic studies indicated that it might have noteworthy value in assisting death investigations.

PURPOSE: This study reports on the first finding of Psychoda larvae collected from decomposing rabbit carcasses placed in Cameron Highlands, Pahang, Malaysia.

METHODS: The larvae were first observed on rabbit carcasses and were collected using tweezers and carefully preserved in 70% ethanol. They were subsequently mounted on microscopy slides using Hoyer's medium and identified as Psychoda sp. morphologically. The identification was also confirmed through a DNA barcoding analysis.

RESULTS: Psychoda sp. larvae were collected on day-10 post-mortem where the rabbit carcasses were at the advanced decay stage of decomposition. The cytochrome c oxidase I (COI) gene sequences of the larvae had 90% similarity with the Psychoda spp. in the database.

CONCLUSION: The finding of these larvae on carrion may provide additional valuable insights into forensic entomology and may assist in death investigations.

Matched MeSH terms: Larva

Fulltext Food Consumption, Developmental Time, and Protein Profile of the Digestive System of the Red Palm Weevil, Rhynchophorus ferrugineus (Coleptera: Dryophthoridae) Larvae Reared on Three Different Diets

Zulkifli AN, Zakeri HA, Azmi WA

J Insect Sci, 2018 Sep 01;18(5).

PMID: 30285257 DOI: 10.1093/jisesa/iey093

The red palm weevil (RPW), Rhynchophorus ferrugineus Olivier (Coleoptera: Dryophthoridae) is one of the most dangerous pests of major cultivated palms including coconut, oil palm, and sago. The larval stage of the weevil causes the most destruction of the palms as it completely destroys the palm cabbage. In this study, the larvae were given three different diets-coconut cabbage, oil palm cabbage, and sago stem, under laboratory conditions for food consumption and developmental time experiment. The protein profiles of the digestive systems of the larvae fed on these three diets were also determined. Although the coconut diet was the most consumed by RPW larvae compared to oil palm and sago diets, the growth rate of RPW larvae on oil palm diet was however significantly shorter than those on the coconut and sago diets: the RPW only need 1 mo and 9 d to complete the larval duration. Proteins profiling of eight 2-DE gel protein spots that range 50-20 kDa were identified by mass spectrometry sequence analysis. Based on the Matrix Science Software, the most dominant protein was cationic trypsin. However, based on the NCBI BLAST tool, aminopeptidase N was the most dominant enzyme. This finding can lead to the development of pest control strategies based on the antinutritional protease inhibitors as potential biocontrol agents. Urgent action to find effective control methods should be taken seriously as this weevil is presumed to be one of the serious pests of oil palm industry in Malaysia.

Matched MeSH terms: Larva/growth & development; Larva/metabolism; Larva/physiology

Redescription of Chironomus javanus and Chironomus kiiensis (Diptera: Chironomidae) Larvae and Adults Collected from a Rice Field in Pulau Pinang, Malaysia

Al-Shami SA, Rawi CS, Ahmad AH, Nor SA

Trop Life Sci Res, 2012 May;23(1):77-86.

PMID: 24575227

Chironomus javanus (Kieffer) and Chironomus kiiensis Tokunaga were redescribed from materials collected from a rice field in Pulau Pinang, Malaysia. The larvae can only be distinguished after careful preparation and examination using a compound microscope, but the pupae were not useful to differentiate C. javanus from C. kiiensis. The adult specimens showed clear body and wing characteristics for rapid and accurate identification.

Matched MeSH terms: Larva

Fulltext Redescription of Chironomus javanus and Chironomus kiiensis (diptera: chironomidae) larvae and adults collected from a rice field in Pulau Pinang, Malaysia

Salman A Al-Shami, Che Salmah Md Rawi, Abu Hassan Ahmad, Siti Azizah Mohd Nor

Trop Life Sci Res, 2012;23(1):77-86.

MyJurnal

Chironomus javanus (Kieffer) and Chironomus kiiensis Tokunaga were redescribed from materials collected from a rice field in Pulau Pinang, Malaysia. The larvae can only be distinguished after careful preparation and examination using a compound microscope, but the pupae were not useful to differentiate C. javanus from C. kiiensis. The adult specimens showed clear body and wing characteristics for rapid and accurate identification.

Matched MeSH terms: Larva

Fulltext Effect of salinity on embryo and larval development of oyster Crassostrea iredalei

Ng, Amelia Phei Fang, Teh, Chiew Peng, Poi, Khoy Yen, Tan, Aileen Shau Hwai, Zulfigar Yasin

Trop Life Sci Res, 2016;27(11):23-29.

MyJurnal

The effects of salinity on the embryonic and larvae stage of Crassostrea iredalei
were investigated. Fertilised eggs and one day old D-larvae were subjected to salinities
ranging from 0 to 30 ppt at temperature of 30±2°C. At salinity lower than 10 ppt, 100%
mortality was observed. For embryo development, the highest survival was observed at
salinity 25 ppt with 80.9±2.2% survival with no significant difference compared to 15 and
30 ppt. Shell height and length were both greatest at salinity 30 ppt. Throughout the 11
days culture, the highest larval survival occurred at salinity 15 ppt with no significant
difference compared to all other salinities except 10 ppt. Larval shell sizes showed no
significant differences between salinities, except for 10 ppt. Optimum culture condition for
larvae growth are salinities ranging from 15 to 30 ppt whereby the larval of this species
can tolerate wider range of salinity compared to other oyster species and thus, making it a
competitive species to be cultured.

Matched MeSH terms: Larva

Fulltext Assessment of temperature effects on early larval development survival of hatchery-reared tropical oyster, Crassostrea iredalei

Teh, Chiew Peng, Tan, Aileen Shau Hwai, Vengatesen, Thiyagarajan

Trop Life Sci Res, 2016;27(11):111-116.

MyJurnal

The influence of the cool and warm temperatures on early life development and
survival of tropical oyster, Crassostrea iredalei was studied. D-hinged larvae (day 1 larvae)
were reared to three different temperatures (20°C, 27°C, and 34°C) for nine days. Oyster
larvae reared in temperature 27°C, acted as control (ambient temperature). The highest
survival rate occurred when the larvae were reared in 20°C and 27°C. Larvae reared at
34°C exhibited reduced survival but increase in the growth rate. The growth rate in larvae
reared in high temperature (34°C) was significantly higher compared to larvae reared in
20°C and 27°C (p

Matched MeSH terms: Larva

A survey of snail hosts and larval trematodes collected by peninsular Malaysia and Singapore from 1972 to 1977

Palmieri JR, Sullivan JT, Ow-Yang CK

Southeast Asian J. Trop. Med. Public Health, 1977 Jun;8(2):275-7.

PMID: 918717

Matched MeSH terms: Larva

The persistence of naturally formed mit (Acarina: trombiculidae) foci in Malaysia

Gentry JW, Phang OW, Manikumaran C

Southeast Asian J. Trop. Med. Public Health, 1977 Jun;8(2):214-6.

PMID: 918712

Mite foci were fenced above and below ground to prevent the entry of host animals and to prevent the migration of mites within the soil. Weekly counts were made over a period of thirty weeks with larvae being collected at the beginning and end of the study, but not during the intervening period of hot, dry weather. Post-larval forms can survive for long periods and mite foci can remain productive without being visited by the host animals. Mite foci may be missed by normal survey methods during hot, dry weather.

Matched MeSH terms: Larva

Displaying publications 181 - 200 of 656 in total