"Ropiness" of brood

Introduction to the ropiness test

Figure 29: An AFB infected larva being roped out with a matchstick
Figure 29: An AFB infected larva being roped out with a matchstick

AFB infected larvae at both pre pupal and pupal stages display a characteristic “ropiness” when a small stick is used to slightly stir the diseased tissue in the cell and then the stick is slowly removed (Fig. 29).

The ropiness is thought to be caused by the presence of long chains of the vegetative stage of AFB bacteria intertwining and producing an elastic, binding effect.

The ropiness test is a common technique used to diagnose American foulbrood (for a description of how to accurately perform this test, go to the ropiness test , within the Inspection and Diagnosis section.

A positive ropiness test will almost always correctly diagnose AFB.

Next >>

AFB Quiz
Take the AFB 5 minute quiz

How well do you know what you need to know about AFB and beekeeping? Take our short quiz and find out.

AFB Videos
Videos

Our videos cover everything from your legal obligations to how to recognise AFB, collecting cell and bee samples and more.

AFB Symptoms
Symptoms

There’s a lot of good information here, telling you everything you need to know about recognising AFB: the visual symptoms, smell of AFB and more.

AFB Inspection and Diagnosis
Inspection and Diagnosis

Successfully eliminate AFB by telling the difference between symptoms of AFB and other brood diseases in the hive. We tell you the best methods for inspecting your hives.

AFB Law
The Law

New Zealand beekeepers have a number of legal obligations that must be met regarding AFB disease. Read the shortened list in summary, here.

AFB Elimination
Elimination

Most hives become infected because bees, honey or equipment have been put into a hive from another hive that is infected with AFB. Lower your chances of an  AFB infection by reading this section.

AFB Course Info
AFB Recognition Course Info

Find out when the next AFB Recognition and Competency Courses, or Refresher Courses are available. These are held throughout the year in various New Zealand locations across the South Island and North Island.

AFB App
The AFB App

Get the latest mobile app on Google Play or from Apple’s App Store.