scholarly journals Effects of various environments on number of cocoon and offspring in breeding of southern medicinal leech, Hirudo verbana Carena, 1820

2020 ◽  
Vol 37 (3) ◽  
pp. 207-211
Author(s):  
Bahadır Ugural ◽  
Ramazan Serezli
Keyword(s):  
Medicinal Leech ◽  
Controlled Conditions ◽  
Significant Difference ◽  
Hirudo Verbana ◽  
New Material ◽  
Controlled Environments ◽  
Medicinal Leeches ◽  
Hygienic Conditions

Breeding medicinal leeches in controlled environments is extremely important in order to prevent their extinction. Moreover, due to medicinal leeches coming into contact with the patient's blood, breeding medicinal leeches in hygienic conditions is essential to prevent possible complications. In this study, breeding patterns of Hirudo verbana were studied in controlled conditions and the effects of various moist environments were examined. Peat, hydrogel and chopped sponge materials were compared in terms of number of cocoon and offspring in medicinal leech breeding. Peat and hydrogel environments didn’t show any statistically significant difference for number of cocoon and offspring breeding. Cocoon per leech was 3.13 ± 0.74 for peat and 2.80 ± 0.56 for hydrogel respectively. Offspring per cocoon was 11.81 ± 2.27 for peat and 12.52 ± 1.98 for hydrogel (P>0.05) respectively. In conclusion, hydrogel could be a new material for medicinal leech cocoon deposition environment especially for laboratory breeders.

scholarly journals Functional morphology of suction discs and attachment performance of the Mediterranean medicinal leech ( Hirudo verbana Carena)

2016 ◽  
Vol 13 (117) ◽  
pp. 20160096 ◽  
Author(s):  
Tim Kampowski ◽  
Laura Eberhard ◽  
Friederike Gallenmüller ◽  
Thomas Speck ◽  
Simon Poppinga
Keyword(s):  
Functional Morphology ◽  
High Speed ◽  
Substrate Surface ◽  
Surrounding Medium ◽  
Medicinal Leech ◽  
Force Measurements ◽  
High Speed Video ◽  
Hirudo Verbana ◽  
Substrate Surface Roughness ◽  
Medicinal Leeches

Medicinal leeches use their suction discs for locomotion, adhesion to the host and, in the case of the anterior disc, also for blood ingestion. The biomechanics of their suction-based adhesion systems has been little understood until now. We investigated the functional morphology of the anterior and posterior suckers of Hirudo verbana by using light and scanning electron microscopy. Furthermore, we analysed the adhesion qualitatively and quantitatively by conducting behavioural and mechanical experiments. Our high-speed video analyses provide new insights into the attachment and detachment processes and we present a detailed description of the leech locomotion cycle. Pull-off force measurements of the anterior and posterior suction organs on seven different substrates under both aerial and water-submersed conditions reveal a significant influence of the surrounding medium, the substrate surface roughness and the tested organ on attachment forces and tenacities.

Seasonal Bioaccumulation of Heavy Metals by Medicinal Leech Hirudo verbana

2018 ◽  
Vol 54 (5) ◽  
pp. 56-62
Author(s):  
L. V. Chornaya ◽  
L. A. Kovalchuk ◽  
N. V. Mikshevich
Keyword(s):  
Heavy Metals ◽  
Medicinal Leech ◽  
Hirudo Verbana

Implementation of a Leeches + Antimicrobial Prophylaxis Order Panel to Optimize Medicinal Leech Use at a Tertiary Care Academic Medical Center

2021 ◽  
pp. 089719002199368
Author(s):  
Nicole M. Palm ◽  
Jill C. Wesolowski ◽  
Janet Y. Wu ◽  
Pavithra Srinivas
Keyword(s):  
Antimicrobial Prophylaxis ◽  
Medical Center ◽  
Academic Medical Center ◽  
Tertiary Care ◽  
Medicinal Leech ◽  
Aeromonas Species ◽  
Leech Therapy ◽  
Before And After ◽  
Timing Of Initiation ◽  
Medicinal Leeches

Medicinal leech therapy promotes vascular flow and can be used to salvage grafts. Medicinal leeches have a symbiotic relationship with Aeromonas species and can therefore present a risk of bacterial transmission to patients. Antimicrobial prophylaxis is warranted for the duration of leech therapy, however, an institutional evaluation of 40 patients receiving medicinal leech therapy demonstrated poor adherence with recommendations. An electronic medical record order panel for antimicrobial prophylaxis with medicinal leech therapy was implemented, leading to a subsequent improvement in adherence to prophylaxis use, including significant increases in the ordering of antibiotics and the appropriate timing of initiation in the subsequent 10 patients receiving medicinal leech therapy after panel implementation. Aeromonas infections were rare before and after panel implementation, and developed only in the patient subset with non-optimized prophylaxis.

scholarly journals Exploring the attachment of the Mediterranean medicinal leech ( Hirudo verbana ) to porous substrates

2020 ◽  
Vol 17 (168) ◽  
pp. 20200300
Author(s):  
Tim Kampowski ◽  
Lara-Louise Thiemann ◽  
Lukas Kürner ◽  
Thomas Speck ◽  
Simon Poppinga
Keyword(s):  
High Speed ◽  
Medicinal Leech ◽  
Mechanical Tests ◽  
Artificial Substrates ◽  
Hirudo Verbana ◽  
The Mediterranean ◽  
The Rich ◽  
Attachment Mechanism ◽  
Blood Meals ◽  
Porous Substrates

Haematophagous ectoparasites must ensure a reliable hold to their host during blood meals and, therefore, have evolved a broad spectrum of versatile and effective attachment mechanisms. The Mediterranean medicinal leech ( Hirudo verbana ), for example, uses suction on both smooth and textured air-tight substrates. However, preliminary studies showed that H. verbana is also capable of attaching itself to air-permeable substrates, where suction does not work. Using high-speed videography and mechanical tests, we comparatively investigated the attachment of H. verbana on both smooth and textured air-tight as well as on porous artificial substrates, also considering the influence of mucus on sucker surfaces. In general, the leech-specific locomotion cycle did not differ between the tested surfaces, and the leeches were able to reliably attach to both air-tight and porous substrates. From our results, we conclude that suction is presumably the primary attachment mechanism of H. verbana . However, secondary mechanisms such as mechanical interlocking with surface asperities and pores or capillary forces occurring at the interface between the mucus-covered suckers and the substratum are also employed. In any case, the rich repertoire of applicable attachment principles renders the organs of H. verbana functionally highly resilient.

scholarly journals Effectiveness of medicinal leech therapy on infected postauricular ulcer: a case report

2020 ◽  
Vol 6 (3) ◽  
pp. 578
Author(s):  
Sinjid Ramakrishnan ◽  
Madan Bhandari ◽  
Gopikrishna B. J. ◽  
Sahanasheela K. R.
Keyword(s):  
Case Report ◽  
Medicinal Leech ◽  
High Ratio ◽  
Aesthetic Value ◽  
Leech Therapy ◽  
The Aesthetic ◽  
Medicinal Leeches

<p class="abstract">Trauma induced auricular partial defect very common. Due to the aesthetic value, proper reconstruction has to be done preserving the symmetry of bilateral auricles. The reconstruction of auricle is difficult due to the intricate anatomy of the auricle, limited and inconsistent vascularization and the high ratio of cartilage to skin. Historically, Susruta was the first author to describe about auricular repair. In Ayurveda, medicinal leech therapy is praised for it’s usefulness for the healing of ulcers. In this case report, a male of 30 years with a trauma induced postauricular infected ulcer was successfully treated with the application of medicinal leeches for multiple sittings.</p><p class="abstract"> </p>

Proteins and peptides of the salivary gland secretion of medicinal leeches Hirudo verbana, H. medicinalis, and H. orientalis

2008 ◽  
Vol 73 (3) ◽  
pp. 315-320 ◽  
Author(s):  
I. P. Baskova ◽  
E. S. Kostrjukova ◽  
M. A. Vlasova ◽  
O. V. Kharitonova ◽  
S. A. Levitskiy ◽  
...  
Keyword(s):  
Salivary Gland ◽  
Gland Secretion ◽  
Salivary Gland Secretion ◽  
Hirudo Verbana ◽  
Medicinal Leeches ◽  
Proteins And Peptides

scholarly journals Dental caries and plaque formation from diets containing sucrose or glucose in gnotobiotic rats infected with Streptococcus strain IB-1600

1973 ◽  
Vol 29 (2) ◽  
pp. 221-228 ◽  
Author(s):  
T. H. Grenby ◽  
Frances M. Paterson ◽  
R. A. Cawson
Keyword(s):  
Dental Caries ◽  
Dental Plaque ◽  
Plaque Formation ◽  
Small Scale ◽  
Single Strain ◽  
High Sugar ◽  
Controlled Conditions ◽  
Significant Difference

1. Techniques were devised for the operation of a new small-scale gnotobiotic rat unit.2. The unit was then used to compare the cariogenicity of sucrose and glucose under carefully controlled conditions in the presence of a single strain of a streptococcus, as gnotobiotic experiments by other workers had given conflicting results.3. Streptococcus IB-1600 was implanted into thirty-four rats, which were then fed on high-sugar diets under gnotobiotic conditions for 5 or 8 weeks from weaning. The level of caries was significantly higher on the sucrose than on the glucose diet, but there was no significant difference in the extent of soft coronal dental plaque.

scholarly journals Early-Stage Phenotyping of Root Traits Provides Insights into the Drought Tolerance Level of Soybean Cultivars

Agronomy ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 188
Author(s):  
Elana Dayoub ◽  
Jay Ram Lamichhane ◽  
Céline Schoving ◽  
Philippe Debaeke ◽  
Pierre Maury
Keyword(s):  
Soil Moisture ◽  
Water Stress ◽  
Early Stage ◽  
Canopy Cover ◽  
Early Growth ◽  
Growth Difference ◽  
Controlled Conditions ◽  
Significant Difference ◽  
Soil Moisture Status ◽  
Root And Shoot Traits

Soybean (Glycine max (L.) Merr.) may contribute to the agro-ecological transition of cropping systems in Europe, but its productivity is severely affected by summer drought. New drought-avoidance cropping strategies, such as early sowing, require cultivars with high early plant growth under suboptimal conditions. This study aims at phenotyping early-stage root and shoot traits of 10 cultivars commonly grown in Europe. Cultivars were grown in minirhizotrons under two soil moisture status in controlled conditions. Root and shoot traits were evaluated at 10 days after sowing. Field early growth of two cultivars was also analyzed under early and conventional sowing dates. A significant intraspecific variability (p < 0.05) was found for most investigated shoot and root morpho-physiological traits regardless of the soil moisture status under controlled conditions. However, no significant difference among cultivars (p > 0.05) was found in terms of root architectural traits that were mainly affected by water stress. Total root length was positively correlated with shoot length and shoot dry matter (p < 0.05). Under field conditions, the differences between cultivars were expressed by the canopy cover at emergence, which determines the subsequent canopy cover dynamics. The significant early growth difference among cultivars was not related to the maturity group. Cultivars characterized by high root depth and length, high root density and narrow root angle could be considered as good candidates to cope with water stress via better soil exploration. New agronomic strategies mobilizing the diversity of cultivars could thus be tested to improve soybean water use efficiency in response to climate change.

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