Displaying publications 1 - 20 of 28 in total

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  1. Four new species of Cephennomicrus Reitter (Coleoptera, Staphylinidae, Scydmaeninae) from Malaysia
    Jałoszyński P
    Zootaxa, 2015;3911(2):273-9.
    PMID: 25661611 DOI: 10.11646/zootaxa.3911.2.8
    Four new species of Cephennomicrus are described from Malaysia: C. curvidens sp. n., C. gentingensis sp. n. (both from the Genting Highlands, West Malaysia), C. santubongensis sp. n. and C. muluensis sp. n. (both from Sarawak, East Malaysia). Male genitalia of all new taxa are illustrated and diagnostic characters are discussed. 
    Matched MeSH terms: Genitalia, Male
  2. A new species and synonymy in Elacatophora (Coleoptera, Staphylinidae, Scydmaeninae)
    Jałoszyński P
    Zootaxa, 2015;3915(1):143-6.
    PMID: 25662117 DOI: 10.11646/zootaxa.3915.1.9
    A new species of the Oriental genus Elacatophora, E. euconnoides sp. n., is described from the Cameron Highlands, West Malaysia. Diagnostic characters, including the male genitalia, are illustrated and discussed. A new case of subjective synonymy was discovered: Elacatophora minae (Makhan & Ezzatpanah, 2011) is placed as syn. n. of E. soesilae (Makhan & Ezzatpanah, 2011). 
    Matched MeSH terms: Genitalia, Male
  3. Fulltext The probable destructive mechanisms behind COVID-19 on male reproduction system and fertility
    Moshrefi M, Ghasemi-Esmailabad S, Ali J, Findikli N, Mangoli E, Khalili MA
    J Assist Reprod Genet, 2021 Jul;38(7):1691-1708.
    PMID: 33977466 DOI: 10.1007/s10815-021-02097-1
    PURPOSE: The present study aims to summarize the current understanding of probable mechanisms and claims of adverse effects of SARS-CoV-2 on male fertility potential.

    METHODS: Our search was including original articles, reviews, guidelines, letters to the editor, comments on guidelines, and editorials, regarding the male reproductive system. We used the words SARS-CoV-2, coronavirus, severe acute respiratory syndrome coronavirus 2, "2019 ncov," testis, sperm, male factor infertility, fertility treatment, semen, assisted reproductive technology (ART), sexual transmission, and ACE2.

    RESULTS: Data showed coronavirus affects men more than women because of more expression of 2019 nCoV receptors (ACE2 and TMPRSS2) in testicular cells. Also, "Bioinformatics Analysis" suggests that sperm production may be damaged, since "Pseudo Time Analysis" has shown disruption in spermatogenesis. "Gene Ontology" (GO) showed an increase in viral reproduction and a decrease in sperm production-related terms. Recently, SARS-COV-2 mRNA and protein were detected in the semen of patients that had recovered from SARS-CoV-2 infection. Therefore, the probable disruption of blood-testis barrier (BTB) in febrile diseases is suspected in the acute phase of the disease enabling viral entry into the testes. Not only is spermatogenesis disturbed, but also disturbs gonadotropin, androgens, and testosterone secretion during SARS-CoV-2 infection. No sexual transmission has been reported yet; however, detection of the virus in semen still makes the sexual transmission an open question.

    CONCLUSION: There is a concern that male fertility may be disturbed after the SARS-CoV-2 infection. Therefore, follow-up of the reproductive functions and male fertility may be necessary in recovered cases, especially in aged men.

    Matched MeSH terms: Genitalia, Male/pathology*; Genitalia, Male/virology
  4. Fulltext Adverse Effects of Wi-Fi Radiation on Male Reproductive System: A Systematic Review
    Jaffar FHF, Osman K, Ismail NH, Chin KY, Ibrahim SF
    Tohoku J. Exp. Med., 2019 07;248(3):169-179.
    PMID: 31353326 DOI: 10.1620/tjem.248.169
    Extensive use of Wi-Fi has contributed to radiofrequency electromagnetic radiation (RF-EMR) pollution in environment. Various studies have been conducted to evaluate the effect of RF-EMR emitted by Wi-Fi transmitter on male reproduction health. However, there are conflicting findings between studies. Thus, this review aims to elucidate the possible effects of 2.45 GHz Wi-Fi exposure on both animal and human male reproductive system. A computerized database search performed through MEDLINE via Ovid and PUBMED with the following set of keywords: 'Wi-Fi or WiFi or wireless fidelity or Wi-Fi router or WiFi router or electromagnetic or radiofrequency radiation' AND 'sperm or spermatozoa or spermatogenesis or semen or seminal plasma or testes or testis or testosterone or male reproduction' had returned 526 articles. Only 17 studies conformed to pre-set inclusion criterion. Additional records identified through Google Scholar and reviewed article further revealed six eligible articles. A total of 23 articles were used for data extraction, including 15 studies on rats, three studies on mice, and five studies on human health. Sperm count, motility and DNA integrity were the most affected parameters when exposed to RF-EMR emitted by Wi-Fi transmitter. Unfortunately, sperm viability and morphology were inconclusive. Structural and/or physiological analyses of the testes showed degenerative changes, reduced testosterone level, increased apoptotic cells, and DNA damage. These effects were mainly due to the elevation of testicular temperature and oxidative stress activity. In conclusion, exposure towards 2.45 GHz RF-EMR emitted by Wi-Fi transmitter is hazardous on the male reproductive system.
    Matched MeSH terms: Genitalia, Male/radiation effects*
  5. Scrotal emergencies: An imaging perspective
    Ong CYG, Low HM, Chinchure D
    Med J Malaysia, 2018 12;73(6):445-451.
    PMID: 30647231
    Acute scrotal pain is a common complaint in emergency or primary care practice. A myriad of pathologies need to be considered, and while the clinical history often leads the clinician to the correct diagnosis, radiologists are often called upon to provide further diagnostic information through ultrasonography. Here, we present the sonographic features of various scrotal emergencies, as well as a few pitfalls. Through this, we explore the breadth of urgent pathologies that may be encountered, both traumatic and non-traumatic. For the clinician who performs point-of-care ultrasound, whether in clinic or in the emergency department, we hope that this pictorial article will lay a good foundation for confident and accurate image interpretation.
    Matched MeSH terms: Genitalia, Male/injuries
  6. Comparative morphology of genital cones of genus Ancylostoma Dubini, 1843
    Setasuban P
    Southeast Asian J. Trop. Med. Public Health, 1975 Jun;6(2):230-4.
    PMID: 1166351
    Male worms of Ancylostoma braziliense, A. ceylanicum, A. kusimaense, A. malayanum, A. duodenale, A. caninum, A. tubaeforme, Agriostomum vryburgi and Cyclodontostomum purvisi have the external appendages beside the anogenital aperture. These anogenital structures are morphologically similar and are assumed to be homologous among the species with three pairs of teeth or more. In hookworms with two pairs of teeth, the anogenital structures are complex. Anogenital features can be used as a taxonomic character in separating the species.
    Matched MeSH terms: Genitalia, Male/anatomy & histology*
  7. Gross anatomy and ultrasonographic images of the reproductive system of the Sumatran rhinoceros (Dicerorhinus sumatrensis)
    Zahari ZZ, Rosnina Y, Wahid H, Jainudeen MR
    Anat Histol Embryol, 2002 Dec;31(6):350-4.
    PMID: 12693754
    The Sumatran rhinoceros (Dicerorhinus sumatrensis) is the smallest of all the rhino species. It is one of the rarest mammals in the world and is in imminent danger of extinction. A study was carried out on seven wild-caught females, three wild-caught males and one captive born female Sumatran rhinoceros at the Sumatran Rhinoceros Breeding Centre in Sungai Dusun, Selangor, Malaysia, beginning 1990. As a result of the paucity of scientific information on the reproductive biology of the Sumatran rhinoceros, this study was conducted to obtain information, which could assist in the captive breeding of this endangered and near extinct species. The anatomy of the reproductive system was based on two post-mortem specimens and transrectal real-time ultrasonography in six adult females. Genitalia of the Sumatran rhinoceros were similar to those of other species of rhinoceroses. The cervix consisted of several folds, the uterus was bicornuate with a short body and prominent horns and the ovaries were completely covered by the fimbriated end of the fallopian tube. The internal genitalia could be imaged by ultrasonography. The testes were located within a pendulous scrotum. Two lateral projections were located at the base of the penis. A well-defined process glandis was present at the tip of the penis. The accessory sex glands and the testes could be imaged by ultrasonography.
    Matched MeSH terms: Genitalia, Male/anatomy & histology*; Genitalia, Male/physiology; Genitalia, Male/ultrasonography
  8. Fulltext Penetration mechanics of elongated female and male genitalia of earwigs
    Matsumura Y, Kamimura Y, Lee CY, Gorb SN, Rajabi H
    Sci Rep, 2021 04 12;11(1):7920.
    PMID: 33846369 DOI: 10.1038/s41598-021-86864-1
    We unveiled the penile penetration mechanics of two earwig species, Echinosoma horridum, whose intromittent organ, termed virga, is extraordinarily long, and E. denticulatum, whose virga is conversely short. We characterised configuration, geometry, material and bending stiffness for both virga and spermatheca. The short virga of E. denticulatum has a material gradient with the stiffer base, whereas the long virga of E. horridum and the spermathecae of both species are homogeneously sclerotised. The long virga of E. horridum has a lower bending stiffness than the spermatheca. The virga of E. denticulatum is overall less flexible than the spermatheca. We compared our results to a previous study on the penetration mechanics of elongated beetle genitalia. Based on the comparison, we hypothesised that the lower stiffness of the male intromittent organ comparing to the corresponding female structure is a universal prerequisite for the penetration mechanics of the elongated intromittent organ in insects.
    Matched MeSH terms: Genitalia, Male/anatomy & histology; Genitalia, Male/physiology*; Genitalia, Male/ultrastructure
  9. Crocodylian conservation and evolution insights from an anatomical and histological examination of phalli from male false gharial (Tomistoma schlegelii)
    Moore BC, Fitri WN, Augustine L
    Anat Histol Embryol, 2020 May;49(3):390-401.
    PMID: 32154618 DOI: 10.1111/ahe.12542
    As wild population threats for the endangered false gharial (Tomistoma schlegelii) persist, conservation breeding programs, including developing semen collection techniques for subsequent artificial insemination, are becoming important species conservation measures. Developing reproductive biology understanding of a species is important to developing best practices and hopefully maximizing reproductive successes. However, information on crocodylians functional copulatory anatomy in general is lacking. To that end, zoological facilities and conservation centres have the exceptional opportunity to contribute new understandings that may not otherwise be attainable regarding crocodylian reproductive anatomy, particularly during routine physical examinations or post-mortem necropsies. Therefore, to better understand T. schlegelii reproductive biology, to contribute knowledge in support of zoo breeding conservation efforts and to contribute to what is known overall about crocodylian reproduction, we investigated phallic anatomy of adult male Tomistoma from two zoological populations, the St. Louis Zoo, USA and Sungai Dusun Wildlife Reserve, Peninsular Malaysia. Here, we present the gross anatomical features and histological analysis of underlying tissue-level details in pursuit of a better understanding of copulatory function and associated gamete transfer mechanisms. While much of the overall Tomistoma phallic morphology and inferred function corresponds to that of other crocodylian species and speaks to conserved aspects of functional anatomy across taxa, species-specific aspects of glans and glans tip morphology are also identified. These novelties are discussed in a general function and overall broader evolutionary contexts.
    Matched MeSH terms: Genitalia, Male/anatomy & histology*
  10. Revision of the genus Procoryphaeus Mazur, 1984 (Coleoptera: Histeridae: Histerinae: Exosternini)
    Lackner T
    Zootaxa, 2015;4044(2):289-300.
    PMID: 26624713 DOI: 10.11646/zootaxa.4044.2.6
    The genus Procoryphaeus Mazur, 1984 is revised herein. It contains three species: Procoryphaeus violaceus (Lewis, 1905) from Thailand: Tenasserim Mountains; Malaysia: Borneo: Sabah; Indonesia: Java, Sumatra and Papua, Procoryphaeus pilosus (Lewis, 1893) from Tanimbar Island, Indonesia and Procoryphaeus wallacei (Marseul, 1864) from Indonesia: Papua. All type specimens are figured, and male genitalia of P. violaceus are drawn. Lectotypes of Pachycraerus (Coryphaeus) wallacei Marseul, 1864, Coryphaeus violaceus Lewis, 1905 and Coryphaeus pilosus Lewis, 1893 are designated. The exact identities of P. violaceus and P. wallacei species remain unclear since they are morphologically very similar and both respective type specimens are females. A key to species is given.
    Matched MeSH terms: Genitalia, Male
  11. Fulltext Four new species of the genus Philanthaxia Deyrolle, 1864 from Southeast Asia and comments on P. iris Obenberger, 1938 (Coleoptera, Buprestidae, Thomassetiini)
    Bílý S, Nakládal O
    Zookeys, 2011.
    PMID: 21998499 DOI: 10.3897/zookeys.116.1403
    Descriptions of four new species of the genus Philanthaxia Deyrolle, 1864: Philanthaxia pseudoaeneasp. n. (Thailand), Philanthaxia jaklisp. n. (Indonesia, Sumatra), Philanthaxia chalcogenioidessp. n. (Indonesia, Sabah) and Philanthaxia lombokanasp. n. (Indonesia, Lombok) are given. The new species and male genitalia are illustrated and compared with the most similar congeners. Sexual dimorphism of Philanthaxia iris Obenberger, 1938 is described and discussed.
    Matched MeSH terms: Genitalia, Male
  12. Fulltext Seven new species of Resartor Gustafsson et Bush, 2017 (Phthiraptera: Ischnocera: Philopteridae) from Asian 'babblers' (Passeriformes: Leiothrichidae, Paradoxornithidae)
    Gustafsson DR, Chu X, Bush SE, Zou F
    Folia Parasitol., 2018 Dec 20;65.
    PMID: 30593007 DOI: 10.14411/fp.2018.020
    Seven new species of chewing lice in the genus Resartor Gustafsson et Bush, 2017 are described and illustrated. They are: Resartor albofulvus sp. n. ex Heterophasia desgodinsi desgodinsi (Oustalet); Resartor apimimus sp. n. ex Heterophasia picaoides wrayi (Ogilvie-Grant); Resartor aterrimus sp. n. ex Minla ignotincta mariae La Touche; Resartor extraneus sp. n. ex Lioparus chrysotis swinhoii (Verreaux); Resartor guangxiensis sp. n. ex Trochalopteron milnei sinianum Stresemann; Resartor longisuturalis sp. n. ex Actinodura cyanouroptera wingatei (Ogilvie-Grant); Resartor seminudus sp. n. ex Leiothrix argentauris tahanensis (Yen). All species differ in the shape of the head, shape of the male genitalia and abdominal chaetotaxy. A checklist and a key to the species of Resartor are provided.
    Matched MeSH terms: Genitalia, Male
  13. Fulltext Binucleation of male accessory gland cells in the common bed bug Cimex lectularius
    Takeda K, Yamauchi J, Miki A, Kim D, Leong XY, Doggett SL, et al.
    Sci Rep, 2019 04 24;9(1):6500.
    PMID: 31019205 DOI: 10.1038/s41598-019-42844-0
    The insect male accessory gland (MAG) is an internal reproductive organ responsible for the synthesis and secretion of seminal fluid components, which play a pivotal role in the male reproductive strategy. In many species of insects, the effective ejaculation of the MAG products is essential for male reproduction. For this purpose, the fruit fly Drosophila has evolved binucleation in the MAG cells, which causes high plasticity of the glandular epithelium, leading to an increase in the volume of seminal fluid that is ejaculated. However, such a binucleation strategy has only been sporadically observed in Dipteran insects, including fruit flies. Here, we report the discovery of binucleation in the MAG of the common bed bug, Cimex lectularius, which belongs to hemimetabolous Hemiptera phylogenetically distant from holometabolous Diptera. In Cimex, the cell morphology and timing of synchrony during binucleation are quite different from those of Drosophila. Additionally, in Drosophila, the position of the two nuclei in the adult stage changes as a result of the mating history or the nutrient conditions; however, it remains stable in Cimex. These differences suggest that binucleation in the Cimex MAG plays a unique role in the male reproductive system that is distinct from that of Drosophila.
    Matched MeSH terms: Genitalia, Male
  14. Does SARS-CoV-2 infection cause sperm DNA fragmentation? Possible link with oxidative stress
    Sengupta P, Dutta S
    Eur J Contracept Reprod Health Care, 2020 Oct;25(5):405-406.
    PMID: 32643968 DOI: 10.1080/13625187.2020.1787376
    Matched MeSH terms: Genitalia, Male/immunology; Genitalia, Male/metabolism; Genitalia, Male/virology
  15. Comparative morphology of spermatozoa and reproductive systems of zorapteran species from different world regions (Insecta, Zoraptera)
    Dallai R, Gottardo M, Mercati D, Machida R, Mashimo Y, Matsumura Y, et al.
    Arthropod Struct Dev, 2014 Jul;43(4):371-83.
    PMID: 24657729 DOI: 10.1016/j.asd.2014.03.001
    The male and female reproductive apparatus of Zorotypus magnicaudelli (Malaysia), Zorotypus huxleyi (Ecuador) and Zorotypus weidneri (Brazil) were examined and documented in detail. The genital apparatus and sperm of the three species show only minor differences. The testes are larger in Z. magnicaudelli. Z. huxleyi lacks the helical appendage in the accessory glands. A long cuticular flagellum is present in Z. magnicaudelli and in the previously studied Zorotypus caudelli like in several other species, whereas it is absent in Z. weidneri, Z. huxleyi, Zorotypus hubbardi, Zorotypus impolitus and Zorotypus guineensis. Characteristic features of the very similar sperm are the presence of: a) two dense arches above the axoneme; b) a 9 + 9+2 axoneme with detached subtubules A and B of doublets 1 and 6; c) the axonemal end degenerating with enlarging accessory tubules; d) accessory tubules with 17 protofilaments; e) three accessory bodies beneath the axoneme; and f) two mitochondrial derivatives of equal shape. The first characteristic (a) is unknown outside of Zoraptera and possibly autapomorphic. The sperm structure differs distinctly in Z. impolitus and Z. hubbardi, which produce giant sperm and possess a huge spermatheca. The presence of the same sperm type in species either provided with a sclerotized coiled flagellum in males or lacking this structure indicates that a different organization of the genital apparatus does not necessarily affect the sperm structure. The flagellum and its pouch has probably evolved within Zoraptera, but it cannot be excluded that it is a groundplan feature and was reduced several times. The fossil evidence and our findings suggest that distinct modifications in the genital apparatus occurred before the fragmentation of the Gondwanan landmass in the middle Cretaceous.
    Matched MeSH terms: Genitalia, Male/anatomy & histology; Genitalia, Male/cytology
  16. Gross anatomy and ultrasonographic images of the reproductive system of the Malayan tapir (Tapirus indicus)
    Lilia K, Rosnina Y, Abd Wahid H, Zahari ZZ, Abraham M
    Anat Histol Embryol, 2010 Dec;39(6):569-75.
    PMID: 20809915 DOI: 10.1111/j.1439-0264.2010.01030.x
    The Malayan tapir (Tapirus indicus) is the largest among the four tapir species and is listed as an endangered species. Ultrasound examination and description of the external anatomy of the female reproductive system of three adult females were performed, whereas the internal anatomy was investigated in necropsied samples of four adult females and one subadult female. Descriptions of the male external genitalia were conducted on one adult male. Gross examination revealed the presence of a bicornuate uterus. The uterine cervix is firm and muscular with projections towards its lumen, which is also evident on ultrasonography. The elongated and relatively small ovaries, which have a smooth surface, could not be imaged on ultrasonography, due to their anatomical position. The testes are located inside a slightly pendulous scrotum that is sparsely covered with soft, short hairs. The penis has one dorsal and two lateral penile projections just proximal to the glans penis.
    Matched MeSH terms: Genitalia, Male/anatomy & histology*; Genitalia, Male/ultrasonography*
  17. Effects of androgenic gland ablation on male primary and secondary sexual characteristics in the Malaysian prawn, Macrobrachium rosenbergii (de Man) (Decapoda, Palaemonidae), with first evidence of induced feminization in a nonhermaphroditic decapod
    Nagamine C, Knight AW, Maggenti A, Paxman G
    Gen Comp Endocrinol, 1980 Aug;41(4):423-41.
    PMID: 7409450
    Matched MeSH terms: Genitalia, Male/growth & development; Genitalia, Male/physiology*
  18. Fulltext Psychiatric and surgical management of male genital self-mutilation
    Suraya Y, Saw KC
    Singapore Med J, 1999 Oct;40(10):656-8.
    PMID: 10741196
    Cases of genital self-mutilation are usually seen in the general hospital setting and can be difficult to manage especially in those patients who have psychiatric illness. A joint effort between the psychiatric and the surgical services will be required right from the beginning of hospital admission to diagnosis and later, to follow-up. Psychiatric consultation strategies at the different phases of intervention will be needed to cater for the special needs of the surgical team, patient and family. We describe three cases of genital self- mutilators and the general management of these patients.
    Matched MeSH terms: Genitalia, Male/injuries*; Genitalia, Male/surgery
  19. Fulltext Taxonomy and phylogeny of the genus Gastrocentrum Gorham (Coleoptera, Cleridae, Tillinae), with the description of five new species
    Yang G, Yang X, Shi H
    Zookeys, 2020;979:99-132.
    PMID: 33192133 DOI: 10.3897/zookeys.979.53765
    The genus Gastrocentrum Gorham, 1876 is revised to include nine species. Five new species are described in this genus: G. magnumsp. nov. (NE India), G. regularesp. nov. (Cameron Highlands, Malaysia), G. xiaodongisp. nov. (Gyirong, Xizang, China), G. zayuensesp. nov. (Zayü, Xizang, China), and G. gaoligongensesp. nov. (Fugong, Yunnan, China). Gastrocentrum nitidum Schenkling, 1916 is transferred to the genus Tillus as a new combination. All the species in this genus are described (except G. brevicolle), and a key is provided for their identification. Illustrations of male genitalia, female reproductive organs, and other important structures are provided. An interspecific phylogeny-estimate of Gastrocentrum is presented based on morphological data, with two main clades recognized: a clade containing G. unicolor and G. laterimaculatum, and a clade containing the remaining six species (the latter a polytomy consisting of G. magnumsp. nov., G. dux, and G. regularesp. nov., and a well-supported sub-clade representing the remaining species). Additionally, the taxonomic and phylogenetic importance of female reproductive organs is discussed.
    Matched MeSH terms: Genitalia, Male
  20. Descriptions of the female, male and mature larva of Simulium contractum Takaoka (Diptera: Simuliidae) from Sulawesi, Indonesia
    Takaoka H, Sofian-Azirun M, Chen CD, Halim MRA, Lau KW, Low VL, et al.
    Trop Biomed, 2020 Sep 01;37(3):683-690.
    PMID: 33612782 DOI: 10.47665/tb.37.3.683
    Simulium (Simulium) contractum Takaoka from Sulawesi, Indonesia was known only as the pupa. Its female, male and mature larva are described for the first time. The tentative assignment of this species in the Simulium dumogaense species-group is confirmed by the adult characters including the female and male genitalia. The female and male of this species are similar to those of Simulium (Simulium) tumpaense Takaoka and Roberts but are distinguished by the yellowish femora.
    Matched MeSH terms: Genitalia, Male
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