Подпишитесь на нашу рассылку, чтобы быть в курсе последних событий
Нажмите здесь
  • BLS

Biological agents transmissibility

Biological agents and transmissibility

Some transmission routes are more likely to infect than others.

In general, three macro-categories can be identified: direct transmission, indirect transmission and vector transmission.




Transmission by ingestion

This may be accidental ingestion through aerosols or splashes for example.

Per droplet si intende il passaggio di goccioline di grandi dimensioni generate dalla persona infetta (generalmente tramite starnuti, tosse oppure parlando): se espulse a breve distanza possono raggiungere le mucose del soggetto suscettibile.


Contact transmission

It may occur in the case of:

  • skin contact (physical transfer of micro-organisms from an infected, or colonised, person to a susceptible person), especially if the skin has open wounds.
  • Contact means transmission via the haematogenous route, i.e. contact with the blood of infected animals or humans: it becomes a relevant route in hospitals, veterinary clinics, animal husbandry and livestock farms.




Carried transmission

This refers to the passage through common vehicles and concerns those biological agents that can be transmitted by other materials such as water, food, or drugs.


Airborne transmission

This method of transmission can occur as a result of two circumstances:

  • when 'aerosols' are dispersed in the air;
  • when the infectious agent is on the surface of fine, inhalable dust.

In the case of so-called 'aerosols', for example, the biological agent manages to remain in the air for a longer period of time, thus increasing the likelihood of contagion.

By definition, aerosols are small liquid or solid particles (less than 5μm in diameter) suspended within a certain gas, such as the air we breathe.


How do aerosols form?

These very fine volatile particles are formed by the mechanical dispersion of a substance.

Some typical examples of aerosols are clouds and fog, in which very fine water droplets are suspended, or atmospheric particulate matter, consisting of a mix of solid microparticles of organic pollutants (carbon residues, metals, fibres, etc.).

In the industrial sector, numerous products are used in aerosol form, such as insecticides, paints, hairsprays, furniture waxes, deodorants, etc., which are emitted in dispersed form through the action of liquefied or compressed gases.

Just consider particle dispersion from spray cans.


Transmission by droplet

This refers to the passage of large droplets generated by the infected person (usually through sneezing, coughing or talking): if expelled a short distance away, they can reach the mucous membranes of the susceptible person.




Occurs when animals or insects (mosquitoes, flies, ticks, mice, etc.) help carry and transmit the infection.


Stay informed, stay safe.


Autopromotec 2022
Préventica 2022

Статьи по Теме

Октябрь 5, 2022 Safety & Health at Work 2022

BLS è a Safety and Health at Work 2022 Rotterdam (Olanda), 5-6 ottobre 2022 BLS partecipa alla sesta edizione della fiera biennale olandese per i professionisti della sicurezza sul lavoro. In un momento come questo, lavorare in condizioni di sicurezza e salute è diventato un tema attuale e prioritario per tutti. Questo evento è un […]

Февраль 15, 2022 BLS Articles | Hazard and risk compared

Sapresti definire la differenza tra un rischio e un pericolo? Prima di ricorrere a un dispositivo di protezione delle vie respiratorie, bisogna adottare tutte le misure atte a ridurre al minimo il rischio derivante dall’attività lavorativa.     Cosa si intende con rischio? Un rischio corrisponde all'eventualità di subire un danno, connessa a circostanze più […]

Сентябрь 20, 2022 Safety Expo 2022

BLS è a Safety Expo 2022 Bergamo (Italia), 21-22 settembre 2022 L'evento di riferimento in Italia per la salute e la sicurezza dei luoghi di lavoro e la prevenzione incendi è tornato. Questa V edizione con i suoi 16000 MQ di esposizione è ricca di convegni, tavole rotonde, approfondimenti, corsi di formazione, spettacoli, prodotti, servizi e tecnologie.  Vieni a trovarci. Siamo allo stand […]

Подпишитесь на рассылку новостей
Получайте информацию о наших мероприятиях, новых изделиях, каталогах и предстоящих мероприятиях.

Свяжитесь с нами

Обращайтесь к нам с любыми вопросами, мы ответим в течение 48 часов.
Запросить информацию

Società a Socio Unico
via dei Giovi, 41 - 20032 Cormano (MI) - Italia
t/f +39 02 39310212 / 66200473
Privacy Policy - Cookie Policy

Юридический адрес
via dei Giovi, 41 – 20032 Cormano (MI) - Italia
Capitale Sociale | Share Capital: Euro 600.000,00 i.v.
C.C.I.A.A. - R.E.A.: MI 1186898
Partita IVA | VAT N°: IT12296780153
C.F. e Iscrizione al Registro delle Imprese di Milano: 07822320151

BLS IBERIA / Av. Pau Casals, 8 08182 Sant Feliu de Codines Barcelona - Spain
BLS NORTHWEST / Reeweg, 132 3343 AP H.I. Ambacht Rotterdam - The Netherlands
BLS DO BRASIL / Rua Alvarenga Peixoto, 307 05095-010 Sao Paulo - SP - Brazil
BLS GERMANY / Dünner Straße 249 D-41066 Mönchengladbach - Germany
BLS FRANCE / 18 Porte du Grand Lyon 01700 Neyron - France