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Physalia physalis

L Prieto, D Macías, A Peliz, J Ruiz
In 2010, the Mediterranean basin experienced Portuguese Man-of-War (Physalia physalis) swarms that had dramatic consequences, including the region's first recorded human fatality attributed to a jellyfish sting. Despite the impact of jellyfish on coastal economic activity and the importance of the tourism industry for the Mediterranean region (accounting for 15% of global tourism), no scientific consensus has been achieved regarding the causes of this episode. Here, we analyse the meteorological and oceanographic conditions of the North-East Atlantic Ocean during the months previous to the appearance of P...
2015: Scientific Reports
Christelle Bouchard, Peter A V Anderson
This study investigated the localization of a voltage-gated calcium channel (VGCC) β subunit in the tentacles and cnidocytes of the Portuguese man-of-war using confocal immunocytochemistry. An antibody specific to the Ca(2+) channel β subunit of the Portuguese-man-of-war (PpCaVβ) was generated, and characterized by Western immunoblotting. The antibody labeling was widespread in the ectoderm of cnidosacs of the tentacles. The binding of the antibody on isolated cnidocytes was distributed at the base of the cell and appeared as multiple strong fluorescent plaques located around the basal hemisphere of the cell...
December 2014: Biological Bulletin
Jasmine Purushothaman, Lubna Al Kharusi, Claudia E Mills, Hamed Ghielani, Mohammad Al Marzouki
A bloom of the hydromedusan jellyfish, Timoides agassizii, occurred in February 2011 off the coast of Sohar, Al Batinah, Sultanate of Oman, in the Gulf of Oman. This species was first observed in 1902 in great numbers off Haddummati Atoll in the Maldive Islands in the Indian Ocean and has rarely been seen since. The species appeared briefly in large numbers off Oman in 2011 and subsequent observation of our 2009 samples of zooplankton from Sohar revealed that it was also present in low numbers (two collected) in one sample in 2009; these are the first records in the Indian Ocean north of the Maldives...
2013: Zootaxa
D Mebs
BACKGROUND: Jellyfish are distributed worldwide; they cause local skin injuries upon contact which are often followed by systemic signs of envenoming. OBJECTIVES: Which jellyfish species are of medical importance, which skin reactions and systemic symptoms occur, which first-aid measures and treatment options exist? METHODS: Review of the medical literature and discussion of first-aid and therapeutic options. RESULTS: Jellyfish capable of causing skin injuries occur in almost all oceans...
October 2014: Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete
Vidal Haddad Jr, Rossana Virga, Adriano Bechara, Fábio Lang da Silveira, André Carrara Morandini
INTRODUCTION: Portuguese man-of-war, Physalia physalis (Linnaeus, 1758), are cnidarians capable of discharging intracellular organelles filled with venom, resulting in severe envenomation in humans. METHODS: We report the clinical and therapeutic aspects of 331 accidents involving Portuguese man-of-war in an outbreak on the coast of the State of São Paulo, Brazil. RESULTS: The clinical manifestations of envenomation were rare and mild and mostly local, systemic reactions; there was a low rate of late complications...
September 2013: Revista da Sociedade Brasileira de Medicina Tropical
Marley García Parra, C Lianet Monzote Fidalgo, C Olga Castañeda Pasarón, Neivys García Delgado, Aneysi Pérez Hernández
INTRODUCTION: infections caused by protozoa of the genus Leishmania are a global health problem with a high prevalence in underdeveloped countries. There is no vaccine against this disease at present and the treatment used is poor, so the search for more effective and safe medicines is an urgent need. OBJECTIVE: to assess the in vitro antileishmanial activity of six aqueous and hydroalcohol extracts from marine organisms. METHODS: the activity of six extracts against Leishmania amazonensis promastigots and amastigots as well as their toxicity against peritoneal macrophages in BALB/c mice...
January 2012: Revista Cubana de Medicina Tropical
Dalmiro J Cazorla-Perfetti, Jesus Loyo, Lusneida Lugo, María E Acosta, Pedro Morales, Vidal Haddad, Alfonso J Rodriguez-Morales
Stings caused by jellyfish and jellyfish-like colonies are common all around the world, with serious manifestations and occasional deaths reported in some countries. Between December 2006 and 2007, epidemiological, clinical and treatment aspects of stings caused by the Portuguese man-of-war (Physalia physalis) in 59 patients consulting the ambulatory emergency in Adicora, Falcon State, Venezuela, were studied. Most of the stings occurred in males (59%) preschool and school-aged children (49%), visitors from other areas of the country (92%) during holidays when bathing or diving at the beach (97%)...
September 2012: Travel Medicine and Infectious Disease
Yamin José Risk, João Luiz Costa Cardoso, Vidal Haddad Junior
We report the case of a 42-year old woman who was envenomed by a Portuguese man-o'-war (Physalia physalis). She presented an anomalous reaction manifested by purpuric papules that appeared after the initial phase of envenoming (around 24 hours later), when linear erythematous and edematous papules were observed. Late-onset reactions in accidents involving cnidarians commonly include chronic eruptions and local pigmentation.
July 2012: Anais Brasileiros de Dermatologia
C M Diaz-Garcia, D Fuentes-Silva, C Sanchez-Soto, D Domínguez-Pérez, N García-Delgado, C Varela, G Mendoza-Hernández, A Rodriguez-Romero, O Castaneda, M Hiriart
Physalia physalis is a marine cnidarian from which high molecular weight toxins with hemolytic and neurotoxic effects have been isolated. In the present work, two novel toxins, PpV9.4 and PpV19.3 were purified from P. physalis by bioactive guideline isolation. It involved two steps of column chromatography, gel filtration and RP-HPLC. The molecular weights were 550.7 and 4720.9 Da for PpV9.4 and PpV19.3, respectively. In the light of the Edman sequencing results, the structure of these toxins included the presence of modified amino acids...
2012: Current Medicinal Chemistry
Magali Labadie, Bénédicte Aldabe, Nathalie Ong, Aude Joncquiert-Latarjet, Vincent Groult, Amélie Poulard, Mathieu Coudreuse, Laurie Cordier, Patrick Rolland, Pierre Chanseau, Luc de Haro
CONTEXT: The Portuguese man-o-war is a cnidaria classically found in tropical waters. It can cause serious and even life-threatening envenomation in swimmers, surfers and seafarers. Presence of the Atlantic species Physalia physalis has long been reported in European coastal waters but was always an exceptional event. OBJECTIVE: To describe the experience of the Bordeaux Poison centre about Physalia stings since the first collective episode reported in 2008. METHODS: Clinical retrospective description of cases series of Physalia envenomations reported to the local poison centre from 2008 to 2011 inclusive...
August 2012: Clinical Toxicology
Maria do Carmo Araújo Palmeira Queiroz, Juliana Nascimento de Andrade Rabelo Caldas
It is reported the case of a 21-year-old female bather with a skin lesion, heart-shaped ,characteristic of attack by jellyfish.
May 2011: Anais Brasileiros de Dermatologia
Laura M Birsa, Peter G Verity, Richard F Lee
Jellyfish tentacles in contact with human skin can produce pain swelling and redness. The pain is due to discharge of jellyfish nematocysts and associated toxins and discharge can be caused by a variety of mechanical and chemical stimuli. A series of tests were carried out with chemicals traditionally used to treat jellyfish stings e.g. acetic acid ammonia meat tenderizer baking soda and urea to determine if these chemicals stimulated or inhibited nematocyst discharge and if they brought relief to testers who were exposed to jellyfish tentacles...
May 2010: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
Shawn C Oppegard, Peter A Anderson, David T Eddington
BACKGROUND: Cnidocysts isolated from cnidarian organisms are attractive as a drug-delivery platform due to their fast, efficient delivery of toxins. The cnidocyst could be utilized as the means to deliver therapeutics in a wearable drug-delivery patch. Cnidocysts have been previously shown to discharge upon stimulation via electrical, mechanical, and chemical pathways. Cnidocysts isolated from the Portuguese Man O' War jellyfish (Physalia physalis) are attractive for this purpose because they possess relatively long threads, are capable of puncturing through hard fish scales, and are stable for years...
2009: Journal of Biological Engineering
G Iosilevskii, D Weihs
Physalia physalis, commonly known as the Portuguese man-of-war (PMW), is a peculiar looking colony of specialized polyps. The most conspicuous members of this colony are the gas-filled sail-like float and the long tentacles, budding asymmetrically beneath the float. This study addresses the sailing of the PMW, and, in particular, the hydrodynamics of its trailing tentacles, the interaction between the tentacles and the float and the actual sailing performance. This paper attempts to provide answers for two of the many open questions concerning P...
July 6, 2009: Journal of the Royal Society, Interface
No abstract text is available yet for this article.
November 1947: Journal of the Marine Biological Association of the United Kingdom
Dirk M Elston
No abstract text is available yet for this article.
September 2007: Cutis; Cutaneous Medicine for the Practitioner
C Bouchard, R B Price, C G Moneypenny, L F Thompson, M Zillhardt, L Stalheim, P A V Anderson
Cnidocytes were dissociated from the tentacles of the Portuguese Man O'War Physalia physalis using heat treatment, and purified using density centrifugation. Visual observation confirmed that these cnidocytes contained a nucleus, a cnidocyst and an apical stereocilium, confirming that the cells were intact. A cnidocyte-specific amplified cDNA library was then prepared using RNA isolated from the cnidocytes, and screened for voltage-gated ion channel subunits using conventional molecular cloning techniques. A variety of channel proteins were identified and full-length sequence obtained for two of them, a Ca(2+) channel beta subunit (PpCa(V)beta) and a Shaker-like K(+) channel (PpK(V)1)...
August 2006: Journal of Experimental Biology
No abstract text is available yet for this article.
October 1962: Biochemical Journal
No abstract text is available yet for this article.
July 1961: Proceedings of the Society for Experimental Biology and Medicine
Vidal Haddad, Fábio Lang da Silveira, João Luiz Costa Cardoso, André Carrara Morandini
Forty-nine accidents caused by jellyfish (Cnidaria) were observed during a period of 5 years on the southeastern coast of Brazil. Most of them involved male patients (65.3%), the injured areas being mainly the legs (71.3%) and the trunk (65.3%). Twenty accidents with Chiropsalmus quadrumanus, four with Physalia physalis and 20 with unidentified jellyfish presented intense pain, linear plaques and systemic symptoms. The five cases with Olindias sambaquiensis caused mild pain, round plaques and no systemic symptoms...
October 2002: Toxicon: Official Journal of the International Society on Toxinology
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